/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:23:15,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:23:15,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:23:15,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:23:16,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:23:16,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:23:16,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:23:16,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:23:16,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:23:16,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:23:16,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:23:16,067 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:23:16,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:23:16,067 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:23:16,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:23:16,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:23:16,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:23:16,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:23:16,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:23:16,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:23:16,068 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:23:16,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:23:16,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:23:16,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:23:16,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:23:16,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:23:16,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:23:16,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:23:16,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:23:16,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:23:16,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:23:16,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:23:16,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:23:16,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:23:16,070 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:23:16,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:23:16,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:23:16,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:23:16,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:23:16,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:23:16,289 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:23:16,292 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:23:16,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl [2021-06-12 20:23:16,292 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl' [2021-06-12 20:23:16,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:23:16,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:23:16,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:23:16,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:23:16,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:23:16,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:23:16,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:23:16,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:23:16,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:23:16,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... [2021-06-12 20:23:16,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:23:16,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:23:16,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:23:16,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:23:16,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:23:16,407 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:23:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:23:16,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:23:16,408 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:23:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:23:16,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:23:16,408 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:23:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:23:16,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:23:16,408 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:23:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:23:16,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:23:16,409 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:23:16,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:23:16,724 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-12 20:23:16,725 INFO L202 PluginConnector]: Adding new model word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:23:16 BoogieIcfgContainer [2021-06-12 20:23:16,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:23:16,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:23:16,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:23:16,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:23:16,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:23:16" (1/2) ... [2021-06-12 20:23:16,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af87dca and model type word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:23:16, skipping insertion in model container [2021-06-12 20:23:16,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:23:16" (2/2) ... [2021-06-12 20:23:16,730 INFO L111 eAbstractionObserver]: Analyzing ICFG word-trans.wvr.bpl [2021-06-12 20:23:16,733 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:23:16,733 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:23:16,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:23:16,734 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:23:16,774 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 20:23:16,787 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 20:23:16,798 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:23:16,799 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:23:16,799 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:23:16,799 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:23:16,799 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:23:16,799 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:23:16,799 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:23:16,799 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:23:16,804 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-06-12 20:23:16,817 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:23:16,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:16,825 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:16,825 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash -200100504, now seen corresponding path program 1 times [2021-06-12 20:23:16,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:16,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178043038] [2021-06-12 20:23:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:16,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:16,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178043038] [2021-06-12 20:23:16,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178043038] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:16,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:16,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:16,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96278415] [2021-06-12 20:23:16,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:16,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:16,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:17,004 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:17,137 INFO L93 Difference]: Finished difference Result 230 states and 687 transitions. [2021-06-12 20:23:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:23:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:17,152 INFO L225 Difference]: With dead ends: 230 [2021-06-12 20:23:17,152 INFO L226 Difference]: Without dead ends: 215 [2021-06-12 20:23:17,153 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-12 20:23:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 126. [2021-06-12 20:23:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-06-12 20:23:17,208 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-06-12 20:23:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:17,208 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-06-12 20:23:17,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-06-12 20:23:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:23:17,210 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:17,210 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:17,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:23:17,210 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -393107442, now seen corresponding path program 2 times [2021-06-12 20:23:17,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:17,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385180781] [2021-06-12 20:23:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:17,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:17,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385180781] [2021-06-12 20:23:17,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385180781] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:17,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:17,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:17,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869537478] [2021-06-12 20:23:17,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:17,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:17,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:17,267 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:17,367 INFO L93 Difference]: Finished difference Result 257 states and 779 transitions. [2021-06-12 20:23:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:17,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:23:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:17,371 INFO L225 Difference]: With dead ends: 257 [2021-06-12 20:23:17,371 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 20:23:17,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 20:23:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 132. [2021-06-12 20:23:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-06-12 20:23:17,395 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-06-12 20:23:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:17,396 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-06-12 20:23:17,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-06-12 20:23:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:23:17,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:17,399 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:17,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:23:17,399 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:17,400 INFO L82 PathProgramCache]: Analyzing trace with hash 463457742, now seen corresponding path program 3 times [2021-06-12 20:23:17,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:17,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336861192] [2021-06-12 20:23:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:17,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336861192] [2021-06-12 20:23:17,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336861192] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:17,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:17,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:17,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254855641] [2021-06-12 20:23:17,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:17,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:17,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:17,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:17,446 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:17,512 INFO L93 Difference]: Finished difference Result 244 states and 710 transitions. [2021-06-12 20:23:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:17,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:23:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:17,515 INFO L225 Difference]: With dead ends: 244 [2021-06-12 20:23:17,517 INFO L226 Difference]: Without dead ends: 229 [2021-06-12 20:23:17,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-12 20:23:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 136. [2021-06-12 20:23:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.3333333333333335) internal successors, (450), 135 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 450 transitions. [2021-06-12 20:23:17,534 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 450 transitions. Word has length 14 [2021-06-12 20:23:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:17,534 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 450 transitions. [2021-06-12 20:23:17,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 450 transitions. [2021-06-12 20:23:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:23:17,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:17,535 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:17,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:23:17,535 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash 332136738, now seen corresponding path program 4 times [2021-06-12 20:23:17,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:17,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713586483] [2021-06-12 20:23:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:17,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:17,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713586483] [2021-06-12 20:23:17,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713586483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:17,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:17,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:17,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502001887] [2021-06-12 20:23:17,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:17,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:17,607 INFO L87 Difference]: Start difference. First operand 136 states and 450 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:17,693 INFO L93 Difference]: Finished difference Result 251 states and 743 transitions. [2021-06-12 20:23:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:17,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:23:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:17,695 INFO L225 Difference]: With dead ends: 251 [2021-06-12 20:23:17,696 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 20:23:17,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 20:23:17,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 140. [2021-06-12 20:23:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-12 20:23:17,701 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-12 20:23:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:17,702 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-12 20:23:17,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-12 20:23:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:23:17,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:17,705 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:17,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:23:17,705 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash -515835448, now seen corresponding path program 5 times [2021-06-12 20:23:17,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:17,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344249469] [2021-06-12 20:23:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:17,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:17,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344249469] [2021-06-12 20:23:17,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344249469] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:17,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:17,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:17,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916850570] [2021-06-12 20:23:17,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:17,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:17,793 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:17,882 INFO L93 Difference]: Finished difference Result 279 states and 867 transitions. [2021-06-12 20:23:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:17,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:23:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:17,884 INFO L225 Difference]: With dead ends: 279 [2021-06-12 20:23:17,884 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 20:23:17,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 20:23:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 142. [2021-06-12 20:23:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-12 20:23:17,889 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-12 20:23:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:17,890 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-12 20:23:17,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-12 20:23:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:23:17,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:17,890 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:17,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:23:17,891 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1214544498, now seen corresponding path program 6 times [2021-06-12 20:23:17,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:17,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920768352] [2021-06-12 20:23:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:17,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:17,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920768352] [2021-06-12 20:23:17,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920768352] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:17,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:17,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:17,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541744799] [2021-06-12 20:23:17,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:17,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:17,935 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,025 INFO L93 Difference]: Finished difference Result 270 states and 831 transitions. [2021-06-12 20:23:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:23:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,027 INFO L225 Difference]: With dead ends: 270 [2021-06-12 20:23:18,027 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 20:23:18,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 20:23:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 142. [2021-06-12 20:23:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-12 20:23:18,032 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-12 20:23:18,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,033 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-12 20:23:18,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-12 20:23:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,033 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 20:23:18,034 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1927039172, now seen corresponding path program 1 times [2021-06-12 20:23:18,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285995492] [2021-06-12 20:23:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285995492] [2021-06-12 20:23:18,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285995492] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681435077] [2021-06-12 20:23:18,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,085 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,151 INFO L93 Difference]: Finished difference Result 280 states and 843 transitions. [2021-06-12 20:23:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:18,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,153 INFO L225 Difference]: With dead ends: 280 [2021-06-12 20:23:18,153 INFO L226 Difference]: Without dead ends: 259 [2021-06-12 20:23:18,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-12 20:23:18,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 147. [2021-06-12 20:23:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.3219178082191783) internal successors, (485), 146 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 485 transitions. [2021-06-12 20:23:18,159 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 485 transitions. Word has length 15 [2021-06-12 20:23:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,159 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 485 transitions. [2021-06-12 20:23:18,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 485 transitions. [2021-06-12 20:23:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,159 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:23:18,160 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1938853291, now seen corresponding path program 1 times [2021-06-12 20:23:18,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796997705] [2021-06-12 20:23:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796997705] [2021-06-12 20:23:18,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796997705] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741108734] [2021-06-12 20:23:18,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,230 INFO L87 Difference]: Start difference. First operand 147 states and 485 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,285 INFO L93 Difference]: Finished difference Result 262 states and 767 transitions. [2021-06-12 20:23:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:18,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,287 INFO L225 Difference]: With dead ends: 262 [2021-06-12 20:23:18,287 INFO L226 Difference]: Without dead ends: 229 [2021-06-12 20:23:18,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-12 20:23:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 147. [2021-06-12 20:23:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.287671232876712) internal successors, (480), 146 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 480 transitions. [2021-06-12 20:23:18,291 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 480 transitions. Word has length 15 [2021-06-12 20:23:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,291 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 480 transitions. [2021-06-12 20:23:18,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 480 transitions. [2021-06-12 20:23:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,292 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:23:18,292 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1727583463, now seen corresponding path program 2 times [2021-06-12 20:23:18,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50257256] [2021-06-12 20:23:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50257256] [2021-06-12 20:23:18,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50257256] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152402602] [2021-06-12 20:23:18,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,343 INFO L87 Difference]: Start difference. First operand 147 states and 480 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,404 INFO L93 Difference]: Finished difference Result 278 states and 838 transitions. [2021-06-12 20:23:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:18,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,405 INFO L225 Difference]: With dead ends: 278 [2021-06-12 20:23:18,405 INFO L226 Difference]: Without dead ends: 256 [2021-06-12 20:23:18,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-12 20:23:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 150. [2021-06-12 20:23:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.295302013422819) internal successors, (491), 149 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 491 transitions. [2021-06-12 20:23:18,410 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 491 transitions. Word has length 15 [2021-06-12 20:23:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,410 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 491 transitions. [2021-06-12 20:23:18,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 491 transitions. [2021-06-12 20:23:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,411 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 20:23:18,411 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash -258187012, now seen corresponding path program 2 times [2021-06-12 20:23:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118833109] [2021-06-12 20:23:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118833109] [2021-06-12 20:23:18,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118833109] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432375640] [2021-06-12 20:23:18,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,449 INFO L87 Difference]: Start difference. First operand 150 states and 491 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,506 INFO L93 Difference]: Finished difference Result 281 states and 840 transitions. [2021-06-12 20:23:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:18,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,508 INFO L225 Difference]: With dead ends: 281 [2021-06-12 20:23:18,508 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 20:23:18,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 20:23:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 150. [2021-06-12 20:23:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.2751677852348995) internal successors, (488), 149 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 488 transitions. [2021-06-12 20:23:18,512 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 488 transitions. Word has length 15 [2021-06-12 20:23:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,512 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 488 transitions. [2021-06-12 20:23:18,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 488 transitions. [2021-06-12 20:23:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,513 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 20:23:18,513 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -294876135, now seen corresponding path program 1 times [2021-06-12 20:23:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125820830] [2021-06-12 20:23:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125820830] [2021-06-12 20:23:18,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125820830] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383688083] [2021-06-12 20:23:18,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,545 INFO L87 Difference]: Start difference. First operand 150 states and 488 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,589 INFO L93 Difference]: Finished difference Result 281 states and 835 transitions. [2021-06-12 20:23:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,590 INFO L225 Difference]: With dead ends: 281 [2021-06-12 20:23:18,590 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 20:23:18,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 20:23:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 154. [2021-06-12 20:23:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.281045751633987) internal successors, (502), 153 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 502 transitions. [2021-06-12 20:23:18,595 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 502 transitions. Word has length 15 [2021-06-12 20:23:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,595 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 502 transitions. [2021-06-12 20:23:18,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,595 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 502 transitions. [2021-06-12 20:23:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,595 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 20:23:18,596 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash -487883073, now seen corresponding path program 2 times [2021-06-12 20:23:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669884735] [2021-06-12 20:23:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669884735] [2021-06-12 20:23:18,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669884735] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744461330] [2021-06-12 20:23:18,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,628 INFO L87 Difference]: Start difference. First operand 154 states and 502 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,689 INFO L93 Difference]: Finished difference Result 373 states and 1108 transitions. [2021-06-12 20:23:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:18,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,691 INFO L225 Difference]: With dead ends: 373 [2021-06-12 20:23:18,691 INFO L226 Difference]: Without dead ends: 354 [2021-06-12 20:23:18,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-12 20:23:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 156. [2021-06-12 20:23:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.2838709677419353) internal successors, (509), 155 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 509 transitions. [2021-06-12 20:23:18,696 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 509 transitions. Word has length 15 [2021-06-12 20:23:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,696 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 509 transitions. [2021-06-12 20:23:18,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 509 transitions. [2021-06-12 20:23:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,697 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 20:23:18,697 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,697 INFO L82 PathProgramCache]: Analyzing trace with hash -473139912, now seen corresponding path program 3 times [2021-06-12 20:23:18,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629278186] [2021-06-12 20:23:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629278186] [2021-06-12 20:23:18,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629278186] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420893066] [2021-06-12 20:23:18,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,724 INFO L87 Difference]: Start difference. First operand 156 states and 509 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,767 INFO L93 Difference]: Finished difference Result 298 states and 879 transitions. [2021-06-12 20:23:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,769 INFO L225 Difference]: With dead ends: 298 [2021-06-12 20:23:18,769 INFO L226 Difference]: Without dead ends: 277 [2021-06-12 20:23:18,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-12 20:23:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 156. [2021-06-12 20:23:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.2838709677419353) internal successors, (509), 155 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 509 transitions. [2021-06-12 20:23:18,773 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 509 transitions. Word has length 15 [2021-06-12 20:23:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,773 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 509 transitions. [2021-06-12 20:23:18,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 509 transitions. [2021-06-12 20:23:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,774 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 20:23:18,774 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1293754188, now seen corresponding path program 4 times [2021-06-12 20:23:18,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173197988] [2021-06-12 20:23:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173197988] [2021-06-12 20:23:18,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173197988] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129460941] [2021-06-12 20:23:18,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,798 INFO L87 Difference]: Start difference. First operand 156 states and 509 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,856 INFO L93 Difference]: Finished difference Result 353 states and 1040 transitions. [2021-06-12 20:23:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:18,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,857 INFO L225 Difference]: With dead ends: 353 [2021-06-12 20:23:18,857 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 20:23:18,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 20:23:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 154. [2021-06-12 20:23:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.2679738562091503) internal successors, (500), 153 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 500 transitions. [2021-06-12 20:23:18,862 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 500 transitions. Word has length 15 [2021-06-12 20:23:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,862 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 500 transitions. [2021-06-12 20:23:18,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 500 transitions. [2021-06-12 20:23:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,863 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 20:23:18,863 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1451583151, now seen corresponding path program 3 times [2021-06-12 20:23:18,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616024595] [2021-06-12 20:23:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616024595] [2021-06-12 20:23:18,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616024595] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973151628] [2021-06-12 20:23:18,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,901 INFO L87 Difference]: Start difference. First operand 154 states and 500 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,937 INFO L93 Difference]: Finished difference Result 281 states and 800 transitions. [2021-06-12 20:23:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:18,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,938 INFO L225 Difference]: With dead ends: 281 [2021-06-12 20:23:18,938 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 20:23:18,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 20:23:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 158. [2021-06-12 20:23:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.261146496815287) internal successors, (512), 157 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 512 transitions. [2021-06-12 20:23:18,943 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 512 transitions. Word has length 15 [2021-06-12 20:23:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,943 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 512 transitions. [2021-06-12 20:23:18,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 512 transitions. [2021-06-12 20:23:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:18,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,943 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-12 20:23:18,943 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,944 INFO L82 PathProgramCache]: Analyzing trace with hash 372369077, now seen corresponding path program 3 times [2021-06-12 20:23:18,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088922744] [2021-06-12 20:23:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088922744] [2021-06-12 20:23:18,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088922744] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:18,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:18,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:18,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447337671] [2021-06-12 20:23:18,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:18,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:18,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:18,981 INFO L87 Difference]: Start difference. First operand 158 states and 512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,035 INFO L93 Difference]: Finished difference Result 282 states and 815 transitions. [2021-06-12 20:23:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,038 INFO L225 Difference]: With dead ends: 282 [2021-06-12 20:23:19,038 INFO L226 Difference]: Without dead ends: 263 [2021-06-12 20:23:19,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-12 20:23:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 158. [2021-06-12 20:23:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.261146496815287) internal successors, (512), 157 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 512 transitions. [2021-06-12 20:23:19,042 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 512 transitions. Word has length 15 [2021-06-12 20:23:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,042 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 512 transitions. [2021-06-12 20:23:19,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 512 transitions. [2021-06-12 20:23:19,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:19,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,043 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-12 20:23:19,043 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1827392437, now seen corresponding path program 4 times [2021-06-12 20:23:19,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920715805] [2021-06-12 20:23:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920715805] [2021-06-12 20:23:19,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920715805] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:19,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462976857] [2021-06-12 20:23:19,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:19,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:19,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,087 INFO L87 Difference]: Start difference. First operand 158 states and 512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,141 INFO L93 Difference]: Finished difference Result 273 states and 790 transitions. [2021-06-12 20:23:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,142 INFO L225 Difference]: With dead ends: 273 [2021-06-12 20:23:19,142 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 20:23:19,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 20:23:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 160. [2021-06-12 20:23:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.2641509433962264) internal successors, (519), 159 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 519 transitions. [2021-06-12 20:23:19,146 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 519 transitions. Word has length 15 [2021-06-12 20:23:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,147 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 519 transitions. [2021-06-12 20:23:19,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 519 transitions. [2021-06-12 20:23:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:19,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,148 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-12 20:23:19,149 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash 384286855, now seen corresponding path program 4 times [2021-06-12 20:23:19,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995141300] [2021-06-12 20:23:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995141300] [2021-06-12 20:23:19,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995141300] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:19,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075344231] [2021-06-12 20:23:19,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:19,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,197 INFO L87 Difference]: Start difference. First operand 160 states and 519 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,245 INFO L93 Difference]: Finished difference Result 254 states and 753 transitions. [2021-06-12 20:23:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,246 INFO L225 Difference]: With dead ends: 254 [2021-06-12 20:23:19,247 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 20:23:19,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 20:23:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2021-06-12 20:23:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.251572327044025) internal successors, (517), 159 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 517 transitions. [2021-06-12 20:23:19,251 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 517 transitions. Word has length 15 [2021-06-12 20:23:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,251 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 517 transitions. [2021-06-12 20:23:19,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 517 transitions. [2021-06-12 20:23:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:19,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,252 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-12 20:23:19,252 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1496312779, now seen corresponding path program 5 times [2021-06-12 20:23:19,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004191266] [2021-06-12 20:23:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004191266] [2021-06-12 20:23:19,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004191266] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:19,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881646627] [2021-06-12 20:23:19,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:19,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:19,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,280 INFO L87 Difference]: Start difference. First operand 160 states and 517 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,323 INFO L93 Difference]: Finished difference Result 286 states and 846 transitions. [2021-06-12 20:23:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,324 INFO L225 Difference]: With dead ends: 286 [2021-06-12 20:23:19,324 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 20:23:19,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 20:23:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 160. [2021-06-12 20:23:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.251572327044025) internal successors, (517), 159 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 517 transitions. [2021-06-12 20:23:19,329 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 517 transitions. Word has length 15 [2021-06-12 20:23:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,329 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 517 transitions. [2021-06-12 20:23:19,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 517 transitions. [2021-06-12 20:23:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:19,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,330 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-12 20:23:19,330 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2099945467, now seen corresponding path program 6 times [2021-06-12 20:23:19,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992465492] [2021-06-12 20:23:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992465492] [2021-06-12 20:23:19,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992465492] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:19,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812442434] [2021-06-12 20:23:19,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:19,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,356 INFO L87 Difference]: Start difference. First operand 160 states and 517 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,401 INFO L93 Difference]: Finished difference Result 277 states and 810 transitions. [2021-06-12 20:23:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,402 INFO L225 Difference]: With dead ends: 277 [2021-06-12 20:23:19,402 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 20:23:19,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 20:23:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 158. [2021-06-12 20:23:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.2356687898089174) internal successors, (508), 157 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 508 transitions. [2021-06-12 20:23:19,406 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 508 transitions. Word has length 15 [2021-06-12 20:23:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,406 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 508 transitions. [2021-06-12 20:23:19,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 508 transitions. [2021-06-12 20:23:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:19,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,406 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-12 20:23:19,407 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,407 INFO L82 PathProgramCache]: Analyzing trace with hash 232212098, now seen corresponding path program 5 times [2021-06-12 20:23:19,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939420357] [2021-06-12 20:23:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939420357] [2021-06-12 20:23:19,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939420357] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:19,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931910809] [2021-06-12 20:23:19,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:19,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:19,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,439 INFO L87 Difference]: Start difference. First operand 158 states and 508 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,482 INFO L93 Difference]: Finished difference Result 312 states and 947 transitions. [2021-06-12 20:23:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,483 INFO L225 Difference]: With dead ends: 312 [2021-06-12 20:23:19,483 INFO L226 Difference]: Without dead ends: 285 [2021-06-12 20:23:19,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-12 20:23:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2021-06-12 20:23:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.238993710691824) internal successors, (515), 159 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 515 transitions. [2021-06-12 20:23:19,487 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 515 transitions. Word has length 15 [2021-06-12 20:23:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,488 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 515 transitions. [2021-06-12 20:23:19,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 515 transitions. [2021-06-12 20:23:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:19,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,489 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-12 20:23:19,489 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1046340473, now seen corresponding path program 5 times [2021-06-12 20:23:19,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801945963] [2021-06-12 20:23:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801945963] [2021-06-12 20:23:19,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801945963] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:19,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122157240] [2021-06-12 20:23:19,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:19,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,515 INFO L87 Difference]: Start difference. First operand 160 states and 515 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,592 INFO L93 Difference]: Finished difference Result 371 states and 1121 transitions. [2021-06-12 20:23:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,594 INFO L225 Difference]: With dead ends: 371 [2021-06-12 20:23:19,594 INFO L226 Difference]: Without dead ends: 352 [2021-06-12 20:23:19,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-12 20:23:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 160. [2021-06-12 20:23:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.238993710691824) internal successors, (515), 159 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 515 transitions. [2021-06-12 20:23:19,600 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 515 transitions. Word has length 15 [2021-06-12 20:23:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,600 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 515 transitions. [2021-06-12 20:23:19,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 515 transitions. [2021-06-12 20:23:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:19,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,601 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-12 20:23:19,601 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1131085214, now seen corresponding path program 6 times [2021-06-12 20:23:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832646518] [2021-06-12 20:23:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832646518] [2021-06-12 20:23:19,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832646518] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763427142] [2021-06-12 20:23:19,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:19,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,630 INFO L87 Difference]: Start difference. First operand 160 states and 515 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,693 INFO L93 Difference]: Finished difference Result 377 states and 1137 transitions. [2021-06-12 20:23:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:19,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,695 INFO L225 Difference]: With dead ends: 377 [2021-06-12 20:23:19,695 INFO L226 Difference]: Without dead ends: 356 [2021-06-12 20:23:19,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-12 20:23:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 160. [2021-06-12 20:23:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.238993710691824) internal successors, (515), 159 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 515 transitions. [2021-06-12 20:23:19,700 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 515 transitions. Word has length 15 [2021-06-12 20:23:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,700 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 515 transitions. [2021-06-12 20:23:19,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 515 transitions. [2021-06-12 20:23:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:23:19,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,701 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-12 20:23:19,701 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash -964122021, now seen corresponding path program 6 times [2021-06-12 20:23:19,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984528683] [2021-06-12 20:23:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984528683] [2021-06-12 20:23:19,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984528683] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:23:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728818341] [2021-06-12 20:23:19,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:23:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:23:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,726 INFO L87 Difference]: Start difference. First operand 160 states and 515 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,771 INFO L93 Difference]: Finished difference Result 268 states and 825 transitions. [2021-06-12 20:23:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:23:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,773 INFO L225 Difference]: With dead ends: 268 [2021-06-12 20:23:19,773 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 20:23:19,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 20:23:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2021-06-12 20:23:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.2264150943396226) internal successors, (513), 159 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 513 transitions. [2021-06-12 20:23:19,776 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 513 transitions. Word has length 15 [2021-06-12 20:23:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,777 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 513 transitions. [2021-06-12 20:23:19,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 513 transitions. [2021-06-12 20:23:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:23:19,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,777 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-12 20:23:19,777 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash 360622849, now seen corresponding path program 1 times [2021-06-12 20:23:19,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240607122] [2021-06-12 20:23:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240607122] [2021-06-12 20:23:19,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240607122] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:23:19,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226654540] [2021-06-12 20:23:19,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:23:19,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:23:19,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:23:19,796 INFO L87 Difference]: Start difference. First operand 160 states and 513 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,814 INFO L93 Difference]: Finished difference Result 304 states and 846 transitions. [2021-06-12 20:23:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:23:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,815 INFO L225 Difference]: With dead ends: 304 [2021-06-12 20:23:19,815 INFO L226 Difference]: Without dead ends: 282 [2021-06-12 20:23:19,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-12 20:23:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 160. [2021-06-12 20:23:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.1823899371069184) internal successors, (506), 159 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 506 transitions. [2021-06-12 20:23:19,819 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 506 transitions. Word has length 16 [2021-06-12 20:23:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,819 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 506 transitions. [2021-06-12 20:23:19,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 506 transitions. [2021-06-12 20:23:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:23:19,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,820 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-12 20:23:19,820 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1058721603, now seen corresponding path program 2 times [2021-06-12 20:23:19,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853105037] [2021-06-12 20:23:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853105037] [2021-06-12 20:23:19,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853105037] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:23:19,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905475569] [2021-06-12 20:23:19,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:23:19,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:23:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:23:19,836 INFO L87 Difference]: Start difference. First operand 160 states and 506 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,854 INFO L93 Difference]: Finished difference Result 298 states and 826 transitions. [2021-06-12 20:23:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:23:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,855 INFO L225 Difference]: With dead ends: 298 [2021-06-12 20:23:19,855 INFO L226 Difference]: Without dead ends: 276 [2021-06-12 20:23:19,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-12 20:23:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 153. [2021-06-12 20:23:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.223684210526316) internal successors, (490), 152 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 490 transitions. [2021-06-12 20:23:19,859 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 490 transitions. Word has length 16 [2021-06-12 20:23:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,859 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 490 transitions. [2021-06-12 20:23:19,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 490 transitions. [2021-06-12 20:23:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:23:19,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,860 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-12 20:23:19,860 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,860 INFO L82 PathProgramCache]: Analyzing trace with hash -570116437, now seen corresponding path program 1 times [2021-06-12 20:23:19,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75900513] [2021-06-12 20:23:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75900513] [2021-06-12 20:23:19,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75900513] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:23:19,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874284416] [2021-06-12 20:23:19,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:23:19,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:23:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:23:19,874 INFO L87 Difference]: Start difference. First operand 153 states and 490 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,893 INFO L93 Difference]: Finished difference Result 267 states and 761 transitions. [2021-06-12 20:23:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:23:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,894 INFO L225 Difference]: With dead ends: 267 [2021-06-12 20:23:19,894 INFO L226 Difference]: Without dead ends: 267 [2021-06-12 20:23:19,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-12 20:23:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 145. [2021-06-12 20:23:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.2083333333333335) internal successors, (462), 144 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 462 transitions. [2021-06-12 20:23:19,898 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 462 transitions. Word has length 16 [2021-06-12 20:23:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,898 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 462 transitions. [2021-06-12 20:23:19,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 462 transitions. [2021-06-12 20:23:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:23:19,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,898 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-12 20:23:19,899 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash -581930556, now seen corresponding path program 1 times [2021-06-12 20:23:19,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095111296] [2021-06-12 20:23:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095111296] [2021-06-12 20:23:19,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095111296] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:23:19,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760715761] [2021-06-12 20:23:19,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:23:19,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:23:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:23:19,913 INFO L87 Difference]: Start difference. First operand 145 states and 462 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,927 INFO L93 Difference]: Finished difference Result 261 states and 729 transitions. [2021-06-12 20:23:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:23:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,928 INFO L225 Difference]: With dead ends: 261 [2021-06-12 20:23:19,928 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 20:23:19,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 20:23:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2021-06-12 20:23:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.147887323943662) internal successors, (447), 142 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 447 transitions. [2021-06-12 20:23:19,932 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 447 transitions. Word has length 16 [2021-06-12 20:23:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,932 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 447 transitions. [2021-06-12 20:23:19,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 447 transitions. [2021-06-12 20:23:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:23:19,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,932 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-12 20:23:19,932 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1813140347, now seen corresponding path program 3 times [2021-06-12 20:23:19,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298403101] [2021-06-12 20:23:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298403101] [2021-06-12 20:23:19,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298403101] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:23:19,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420522531] [2021-06-12 20:23:19,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:23:19,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:23:19,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:23:19,944 INFO L87 Difference]: Start difference. First operand 143 states and 447 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,956 INFO L93 Difference]: Finished difference Result 255 states and 710 transitions. [2021-06-12 20:23:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:23:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:23:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,958 INFO L225 Difference]: With dead ends: 255 [2021-06-12 20:23:19,958 INFO L226 Difference]: Without dead ends: 233 [2021-06-12 20:23:19,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-12 20:23:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 143. [2021-06-12 20:23:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.084507042253521) internal successors, (438), 142 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 438 transitions. [2021-06-12 20:23:19,961 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 438 transitions. Word has length 16 [2021-06-12 20:23:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,961 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 438 transitions. [2021-06-12 20:23:19,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 438 transitions. [2021-06-12 20:23:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:23:19,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,962 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-12 20:23:19,962 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1420564495, now seen corresponding path program 2 times [2021-06-12 20:23:19,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605621624] [2021-06-12 20:23:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:19,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:19,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605621624] [2021-06-12 20:23:19,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605621624] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:19,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:19,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:23:19,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006192531] [2021-06-12 20:23:19,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:23:19,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:19,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:23:19,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:23:19,973 INFO L87 Difference]: Start difference. First operand 143 states and 438 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:19,988 INFO L93 Difference]: Finished difference Result 206 states and 573 transitions. [2021-06-12 20:23:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:23:19,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:23:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:19,989 INFO L225 Difference]: With dead ends: 206 [2021-06-12 20:23:19,989 INFO L226 Difference]: Without dead ends: 206 [2021-06-12 20:23:19,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-12 20:23:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2021-06-12 20:23:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.918918918918919) internal successors, (324), 111 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 324 transitions. [2021-06-12 20:23:19,992 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 324 transitions. Word has length 16 [2021-06-12 20:23:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:19,992 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 324 transitions. [2021-06-12 20:23:19,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 324 transitions. [2021-06-12 20:23:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:23:19,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:19,993 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:19,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-12 20:23:19,993 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:19,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1372165464, now seen corresponding path program 2 times [2021-06-12 20:23:19,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:19,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99719331] [2021-06-12 20:23:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99719331] [2021-06-12 20:23:20,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99719331] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:23:20,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737093328] [2021-06-12 20:23:20,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:23:20,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:23:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:23:20,005 INFO L87 Difference]: Start difference. First operand 112 states and 324 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,014 INFO L93 Difference]: Finished difference Result 163 states and 436 transitions. [2021-06-12 20:23:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:23:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:23:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,015 INFO L225 Difference]: With dead ends: 163 [2021-06-12 20:23:20,015 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 20:23:20,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 20:23:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-06-12 20:23:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.9345794392523366) internal successors, (314), 107 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) [2021-06-12 20:23:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 314 transitions. [2021-06-12 20:23:20,017 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 314 transitions. Word has length 16 [2021-06-12 20:23:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,018 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 314 transitions. [2021-06-12 20:23:20,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 314 transitions. [2021-06-12 20:23:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:23:20,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,018 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-12 20:23:20,018 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash -97814091, now seen corresponding path program 4 times [2021-06-12 20:23:20,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163050710] [2021-06-12 20:23:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163050710] [2021-06-12 20:23:20,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163050710] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:23:20,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102667194] [2021-06-12 20:23:20,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:23:20,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:23:20,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:23:20,029 INFO L87 Difference]: Start difference. First operand 108 states and 314 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,039 INFO L93 Difference]: Finished difference Result 123 states and 338 transitions. [2021-06-12 20:23:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:23:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:23:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,040 INFO L225 Difference]: With dead ends: 123 [2021-06-12 20:23:20,040 INFO L226 Difference]: Without dead ends: 108 [2021-06-12 20:23:20,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:23:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-12 20:23:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-06-12 20:23:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-06-12 20:23:20,042 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-06-12 20:23:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,042 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-06-12 20:23:20,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-06-12 20:23:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:20,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,042 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-12 20:23:20,043 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,043 INFO L82 PathProgramCache]: Analyzing trace with hash -524445326, now seen corresponding path program 1 times [2021-06-12 20:23:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312675176] [2021-06-12 20:23:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312675176] [2021-06-12 20:23:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312675176] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:20,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461095581] [2021-06-12 20:23:20,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:20,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:20,075 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,144 INFO L93 Difference]: Finished difference Result 265 states and 721 transitions. [2021-06-12 20:23:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,146 INFO L225 Difference]: With dead ends: 265 [2021-06-12 20:23:20,146 INFO L226 Difference]: Without dead ends: 250 [2021-06-12 20:23:20,146 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-12 20:23:20,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 141. [2021-06-12 20:23:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7928571428571427) internal successors, (391), 140 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 391 transitions. [2021-06-12 20:23:20,149 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 391 transitions. Word has length 17 [2021-06-12 20:23:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,149 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 391 transitions. [2021-06-12 20:23:20,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 391 transitions. [2021-06-12 20:23:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:20,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,149 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-12 20:23:20,150 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,150 INFO L82 PathProgramCache]: Analyzing trace with hash 683107746, now seen corresponding path program 2 times [2021-06-12 20:23:20,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346320447] [2021-06-12 20:23:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346320447] [2021-06-12 20:23:20,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346320447] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:20,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014463285] [2021-06-12 20:23:20,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:20,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:20,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:20,184 INFO L87 Difference]: Start difference. First operand 141 states and 391 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,280 INFO L93 Difference]: Finished difference Result 298 states and 795 transitions. [2021-06-12 20:23:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:20,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:20,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,281 INFO L225 Difference]: With dead ends: 298 [2021-06-12 20:23:20,282 INFO L226 Difference]: Without dead ends: 283 [2021-06-12 20:23:20,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-12 20:23:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-06-12 20:23:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-06-12 20:23:20,285 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-06-12 20:23:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,285 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-06-12 20:23:20,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-06-12 20:23:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:20,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,286 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-12 20:23:20,286 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1015612642, now seen corresponding path program 3 times [2021-06-12 20:23:20,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849935576] [2021-06-12 20:23:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849935576] [2021-06-12 20:23:20,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849935576] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:20,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468708050] [2021-06-12 20:23:20,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:20,327 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,413 INFO L93 Difference]: Finished difference Result 281 states and 763 transitions. [2021-06-12 20:23:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,427 INFO L225 Difference]: With dead ends: 281 [2021-06-12 20:23:20,428 INFO L226 Difference]: Without dead ends: 266 [2021-06-12 20:23:20,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-12 20:23:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-06-12 20:23:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-06-12 20:23:20,431 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-06-12 20:23:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,431 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-06-12 20:23:20,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-06-12 20:23:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:20,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,433 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-12 20:23:20,433 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash 173653428, now seen corresponding path program 4 times [2021-06-12 20:23:20,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494538405] [2021-06-12 20:23:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494538405] [2021-06-12 20:23:20,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494538405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:20,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494578093] [2021-06-12 20:23:20,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:20,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:20,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:20,474 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,546 INFO L93 Difference]: Finished difference Result 289 states and 784 transitions. [2021-06-12 20:23:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,547 INFO L225 Difference]: With dead ends: 289 [2021-06-12 20:23:20,547 INFO L226 Difference]: Without dead ends: 274 [2021-06-12 20:23:20,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-12 20:23:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-06-12 20:23:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-06-12 20:23:20,550 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-06-12 20:23:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,551 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-06-12 20:23:20,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-06-12 20:23:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:20,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,551 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-12 20:23:20,551 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,551 INFO L82 PathProgramCache]: Analyzing trace with hash 147877944, now seen corresponding path program 5 times [2021-06-12 20:23:20,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459084989] [2021-06-12 20:23:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459084989] [2021-06-12 20:23:20,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459084989] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:20,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519786659] [2021-06-12 20:23:20,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:20,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:20,586 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,670 INFO L93 Difference]: Finished difference Result 322 states and 859 transitions. [2021-06-12 20:23:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,671 INFO L225 Difference]: With dead ends: 322 [2021-06-12 20:23:20,671 INFO L226 Difference]: Without dead ends: 307 [2021-06-12 20:23:20,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-12 20:23:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2021-06-12 20:23:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.8322981366459627) internal successors, (456), 161 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 456 transitions. [2021-06-12 20:23:20,675 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 456 transitions. Word has length 17 [2021-06-12 20:23:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,675 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 456 transitions. [2021-06-12 20:23:20,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 456 transitions. [2021-06-12 20:23:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:20,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,675 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-12 20:23:20,675 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1550842444, now seen corresponding path program 6 times [2021-06-12 20:23:20,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550843317] [2021-06-12 20:23:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550843317] [2021-06-12 20:23:20,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550843317] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:20,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746205905] [2021-06-12 20:23:20,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:20,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:20,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:20,708 INFO L87 Difference]: Start difference. First operand 162 states and 456 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,794 INFO L93 Difference]: Finished difference Result 299 states and 814 transitions. [2021-06-12 20:23:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,795 INFO L225 Difference]: With dead ends: 299 [2021-06-12 20:23:20,795 INFO L226 Difference]: Without dead ends: 284 [2021-06-12 20:23:20,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-12 20:23:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 159. [2021-06-12 20:23:20,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-06-12 20:23:20,798 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-06-12 20:23:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,798 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-06-12 20:23:20,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-06-12 20:23:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:20,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,799 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-12 20:23:20,799 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2035892590, now seen corresponding path program 7 times [2021-06-12 20:23:20,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782176420] [2021-06-12 20:23:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782176420] [2021-06-12 20:23:20,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782176420] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:20,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418404158] [2021-06-12 20:23:20,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:20,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:20,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:20,831 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,901 INFO L93 Difference]: Finished difference Result 389 states and 1040 transitions. [2021-06-12 20:23:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:20,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,903 INFO L225 Difference]: With dead ends: 389 [2021-06-12 20:23:20,903 INFO L226 Difference]: Without dead ends: 374 [2021-06-12 20:23:20,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-12 20:23:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 166. [2021-06-12 20:23:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.8484848484848486) internal successors, (470), 165 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 470 transitions. [2021-06-12 20:23:20,907 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 470 transitions. Word has length 17 [2021-06-12 20:23:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,907 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 470 transitions. [2021-06-12 20:23:20,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 470 transitions. [2021-06-12 20:23:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:20,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,907 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-12 20:23:20,907 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash -828339518, now seen corresponding path program 8 times [2021-06-12 20:23:20,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476339149] [2021-06-12 20:23:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476339149] [2021-06-12 20:23:20,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476339149] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:20,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:20,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796685008] [2021-06-12 20:23:20,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:20,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:20,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:20,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:20,941 INFO L87 Difference]: Start difference. First operand 166 states and 470 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,022 INFO L93 Difference]: Finished difference Result 398 states and 1066 transitions. [2021-06-12 20:23:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,023 INFO L225 Difference]: With dead ends: 398 [2021-06-12 20:23:21,023 INFO L226 Difference]: Without dead ends: 383 [2021-06-12 20:23:21,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-12 20:23:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 169. [2021-06-12 20:23:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.880952380952381) internal successors, (484), 168 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 484 transitions. [2021-06-12 20:23:21,027 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 484 transitions. Word has length 17 [2021-06-12 20:23:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,027 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 484 transitions. [2021-06-12 20:23:21,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 484 transitions. [2021-06-12 20:23:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,028 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-12 20:23:21,028 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1767907390, now seen corresponding path program 9 times [2021-06-12 20:23:21,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377707395] [2021-06-12 20:23:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:21,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377707395] [2021-06-12 20:23:21,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377707395] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:21,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:21,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:21,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142373313] [2021-06-12 20:23:21,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:21,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:21,061 INFO L87 Difference]: Start difference. First operand 169 states and 484 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,140 INFO L93 Difference]: Finished difference Result 405 states and 1082 transitions. [2021-06-12 20:23:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,142 INFO L225 Difference]: With dead ends: 405 [2021-06-12 20:23:21,142 INFO L226 Difference]: Without dead ends: 390 [2021-06-12 20:23:21,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-12 20:23:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 161. [2021-06-12 20:23:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.825) internal successors, (452), 160 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 452 transitions. [2021-06-12 20:23:21,146 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 452 transitions. Word has length 17 [2021-06-12 20:23:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,146 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 452 transitions. [2021-06-12 20:23:21,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 452 transitions. [2021-06-12 20:23:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,146 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,146 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-12 20:23:21,146 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1043349262, now seen corresponding path program 10 times [2021-06-12 20:23:21,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485901885] [2021-06-12 20:23:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:21,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485901885] [2021-06-12 20:23:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485901885] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:21,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:21,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:21,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544543877] [2021-06-12 20:23:21,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:21,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:21,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:21,177 INFO L87 Difference]: Start difference. First operand 161 states and 452 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,244 INFO L93 Difference]: Finished difference Result 340 states and 918 transitions. [2021-06-12 20:23:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,245 INFO L225 Difference]: With dead ends: 340 [2021-06-12 20:23:21,245 INFO L226 Difference]: Without dead ends: 325 [2021-06-12 20:23:21,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-12 20:23:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 165. [2021-06-12 20:23:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.841463414634146) internal successors, (466), 164 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 466 transitions. [2021-06-12 20:23:21,249 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 466 transitions. Word has length 17 [2021-06-12 20:23:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,249 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 466 transitions. [2021-06-12 20:23:21,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 466 transitions. [2021-06-12 20:23:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,249 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-12 20:23:21,249 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1480345592, now seen corresponding path program 11 times [2021-06-12 20:23:21,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067964260] [2021-06-12 20:23:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:21,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067964260] [2021-06-12 20:23:21,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067964260] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:21,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:21,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:21,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066627634] [2021-06-12 20:23:21,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:21,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:21,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:21,287 INFO L87 Difference]: Start difference. First operand 165 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,370 INFO L93 Difference]: Finished difference Result 335 states and 909 transitions. [2021-06-12 20:23:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,372 INFO L225 Difference]: With dead ends: 335 [2021-06-12 20:23:21,372 INFO L226 Difference]: Without dead ends: 320 [2021-06-12 20:23:21,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-12 20:23:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2021-06-12 20:23:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-06-12 20:23:21,376 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-06-12 20:23:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,377 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-06-12 20:23:21,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-06-12 20:23:21,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,378 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-12 20:23:21,378 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,378 INFO L82 PathProgramCache]: Analyzing trace with hash -145439044, now seen corresponding path program 12 times [2021-06-12 20:23:21,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008667784] [2021-06-12 20:23:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:21,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008667784] [2021-06-12 20:23:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008667784] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:21,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:21,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:21,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446276765] [2021-06-12 20:23:21,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:21,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:21,413 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,498 INFO L93 Difference]: Finished difference Result 318 states and 879 transitions. [2021-06-12 20:23:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,499 INFO L225 Difference]: With dead ends: 318 [2021-06-12 20:23:21,499 INFO L226 Difference]: Without dead ends: 303 [2021-06-12 20:23:21,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-12 20:23:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 171. [2021-06-12 20:23:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-06-12 20:23:21,503 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-06-12 20:23:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,503 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-06-12 20:23:21,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-06-12 20:23:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,503 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-12 20:23:21,503 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash 161256120, now seen corresponding path program 13 times [2021-06-12 20:23:21,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376646333] [2021-06-12 20:23:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:21,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376646333] [2021-06-12 20:23:21,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376646333] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:21,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:21,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104206557] [2021-06-12 20:23:21,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:21,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:21,543 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,616 INFO L93 Difference]: Finished difference Result 385 states and 1046 transitions. [2021-06-12 20:23:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,618 INFO L225 Difference]: With dead ends: 385 [2021-06-12 20:23:21,618 INFO L226 Difference]: Without dead ends: 370 [2021-06-12 20:23:21,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-12 20:23:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 174. [2021-06-12 20:23:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-06-12 20:23:21,621 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-06-12 20:23:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,621 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-06-12 20:23:21,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-06-12 20:23:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,622 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-12 20:23:21,622 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1057379240, now seen corresponding path program 14 times [2021-06-12 20:23:21,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630326] [2021-06-12 20:23:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:21,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630326] [2021-06-12 20:23:21,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630326] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:21,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:21,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:21,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026016503] [2021-06-12 20:23:21,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:21,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:21,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:21,658 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,732 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-06-12 20:23:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,733 INFO L225 Difference]: With dead ends: 383 [2021-06-12 20:23:21,734 INFO L226 Difference]: Without dead ends: 368 [2021-06-12 20:23:21,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-12 20:23:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 174. [2021-06-12 20:23:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-06-12 20:23:21,737 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-06-12 20:23:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,737 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-06-12 20:23:21,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-06-12 20:23:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,738 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-12 20:23:21,738 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1150316668, now seen corresponding path program 15 times [2021-06-12 20:23:21,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681584170] [2021-06-12 20:23:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:21,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681584170] [2021-06-12 20:23:21,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681584170] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:21,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:21,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:21,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607000887] [2021-06-12 20:23:21,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:21,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:21,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:21,773 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,853 INFO L93 Difference]: Finished difference Result 392 states and 1055 transitions. [2021-06-12 20:23:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,854 INFO L225 Difference]: With dead ends: 392 [2021-06-12 20:23:21,854 INFO L226 Difference]: Without dead ends: 377 [2021-06-12 20:23:21,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-12 20:23:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 177. [2021-06-12 20:23:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.909090909090909) internal successors, (512), 176 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-06-12 20:23:21,864 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-06-12 20:23:21,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,864 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-06-12 20:23:21,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-06-12 20:23:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,864 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-12 20:23:21,865 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash -19872328, now seen corresponding path program 16 times [2021-06-12 20:23:21,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969594151] [2021-06-12 20:23:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:21,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969594151] [2021-06-12 20:23:21,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969594151] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:21,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:21,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:21,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029854537] [2021-06-12 20:23:21,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:21,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:21,900 INFO L87 Difference]: Start difference. First operand 177 states and 512 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:21,975 INFO L93 Difference]: Finished difference Result 376 states and 1032 transitions. [2021-06-12 20:23:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:21,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:21,976 INFO L225 Difference]: With dead ends: 376 [2021-06-12 20:23:21,976 INFO L226 Difference]: Without dead ends: 361 [2021-06-12 20:23:21,976 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-12 20:23:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 174. [2021-06-12 20:23:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-06-12 20:23:21,980 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-06-12 20:23:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:21,980 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-06-12 20:23:21,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-06-12 20:23:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:21,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:21,980 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:21,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-12 20:23:21,980 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash -36809380, now seen corresponding path program 17 times [2021-06-12 20:23:21,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:21,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143731691] [2021-06-12 20:23:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143731691] [2021-06-12 20:23:22,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143731691] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042474234] [2021-06-12 20:23:22,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,014 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,081 INFO L93 Difference]: Finished difference Result 364 states and 991 transitions. [2021-06-12 20:23:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,082 INFO L225 Difference]: With dead ends: 364 [2021-06-12 20:23:22,082 INFO L226 Difference]: Without dead ends: 349 [2021-06-12 20:23:22,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-12 20:23:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 176. [2021-06-12 20:23:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8971428571428572) internal successors, (507), 175 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-06-12 20:23:22,086 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-06-12 20:23:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,086 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-06-12 20:23:22,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-06-12 20:23:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:22,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,086 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:22,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-12 20:23:22,086 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:22,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1103474456, now seen corresponding path program 18 times [2021-06-12 20:23:22,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:22,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643437752] [2021-06-12 20:23:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643437752] [2021-06-12 20:23:22,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643437752] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581201389] [2021-06-12 20:23:22,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,119 INFO L87 Difference]: Start difference. First operand 176 states and 507 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,194 INFO L93 Difference]: Finished difference Result 343 states and 953 transitions. [2021-06-12 20:23:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:22,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,195 INFO L225 Difference]: With dead ends: 343 [2021-06-12 20:23:22,195 INFO L226 Difference]: Without dead ends: 328 [2021-06-12 20:23:22,195 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:22,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-12 20:23:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 174. [2021-06-12 20:23:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-06-12 20:23:22,198 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-06-12 20:23:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,198 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-06-12 20:23:22,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-06-12 20:23:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:22,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,199 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:22,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-12 20:23:22,199 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:22,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1622951230, now seen corresponding path program 19 times [2021-06-12 20:23:22,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:22,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460931183] [2021-06-12 20:23:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460931183] [2021-06-12 20:23:22,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460931183] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883393437] [2021-06-12 20:23:22,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,229 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,298 INFO L93 Difference]: Finished difference Result 360 states and 983 transitions. [2021-06-12 20:23:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:22,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,300 INFO L225 Difference]: With dead ends: 360 [2021-06-12 20:23:22,300 INFO L226 Difference]: Without dead ends: 345 [2021-06-12 20:23:22,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-12 20:23:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 177. [2021-06-12 20:23:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-06-12 20:23:22,303 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-06-12 20:23:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,303 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-06-12 20:23:22,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-06-12 20:23:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:22,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,304 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:22,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-12 20:23:22,304 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:22,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1422092646, now seen corresponding path program 20 times [2021-06-12 20:23:22,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:22,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649222112] [2021-06-12 20:23:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649222112] [2021-06-12 20:23:22,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649222112] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19604854] [2021-06-12 20:23:22,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,337 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,419 INFO L93 Difference]: Finished difference Result 377 states and 1017 transitions. [2021-06-12 20:23:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:22,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,421 INFO L225 Difference]: With dead ends: 377 [2021-06-12 20:23:22,421 INFO L226 Difference]: Without dead ends: 362 [2021-06-12 20:23:22,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-12 20:23:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 179. [2021-06-12 20:23:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-06-12 20:23:22,425 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 17 [2021-06-12 20:23:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,425 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-06-12 20:23:22,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-06-12 20:23:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:22,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,425 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:22,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-12 20:23:22,425 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash 203457286, now seen corresponding path program 21 times [2021-06-12 20:23:22,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:22,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137872272] [2021-06-12 20:23:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137872272] [2021-06-12 20:23:22,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137872272] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732301042] [2021-06-12 20:23:22,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,460 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,531 INFO L93 Difference]: Finished difference Result 354 states and 972 transitions. [2021-06-12 20:23:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,533 INFO L225 Difference]: With dead ends: 354 [2021-06-12 20:23:22,533 INFO L226 Difference]: Without dead ends: 339 [2021-06-12 20:23:22,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-12 20:23:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 177. [2021-06-12 20:23:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-06-12 20:23:22,536 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-06-12 20:23:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,536 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-06-12 20:23:22,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-06-12 20:23:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:22,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,537 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:22,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-12 20:23:22,537 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1026845314, now seen corresponding path program 22 times [2021-06-12 20:23:22,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:22,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247962416] [2021-06-12 20:23:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247962416] [2021-06-12 20:23:22,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247962416] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550869007] [2021-06-12 20:23:22,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,567 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,654 INFO L93 Difference]: Finished difference Result 409 states and 1106 transitions. [2021-06-12 20:23:22,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:22,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,656 INFO L225 Difference]: With dead ends: 409 [2021-06-12 20:23:22,656 INFO L226 Difference]: Without dead ends: 394 [2021-06-12 20:23:22,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-12 20:23:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 180. [2021-06-12 20:23:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.910614525139665) internal successors, (521), 179 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 521 transitions. [2021-06-12 20:23:22,659 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 521 transitions. Word has length 17 [2021-06-12 20:23:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,659 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 521 transitions. [2021-06-12 20:23:22,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 521 transitions. [2021-06-12 20:23:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:22,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,660 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:22,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-12 20:23:22,660 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:22,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1848016830, now seen corresponding path program 23 times [2021-06-12 20:23:22,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:22,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266398463] [2021-06-12 20:23:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266398463] [2021-06-12 20:23:22,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266398463] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566277237] [2021-06-12 20:23:22,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,693 INFO L87 Difference]: Start difference. First operand 180 states and 521 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,782 INFO L93 Difference]: Finished difference Result 407 states and 1110 transitions. [2021-06-12 20:23:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,787 INFO L225 Difference]: With dead ends: 407 [2021-06-12 20:23:22,787 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 20:23:22,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 20:23:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 183. [2021-06-12 20:23:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9395604395604398) internal successors, (535), 182 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 535 transitions. [2021-06-12 20:23:22,791 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 535 transitions. Word has length 17 [2021-06-12 20:23:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,791 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 535 transitions. [2021-06-12 20:23:22,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 535 transitions. [2021-06-12 20:23:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:22,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,792 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:22,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-12 20:23:22,792 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:22,792 INFO L82 PathProgramCache]: Analyzing trace with hash 748230078, now seen corresponding path program 24 times [2021-06-12 20:23:22,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:22,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225184530] [2021-06-12 20:23:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225184530] [2021-06-12 20:23:22,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225184530] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474944163] [2021-06-12 20:23:22,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,829 INFO L87 Difference]: Start difference. First operand 183 states and 535 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,914 INFO L93 Difference]: Finished difference Result 384 states and 1065 transitions. [2021-06-12 20:23:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,916 INFO L225 Difference]: With dead ends: 384 [2021-06-12 20:23:22,916 INFO L226 Difference]: Without dead ends: 369 [2021-06-12 20:23:22,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-12 20:23:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-06-12 20:23:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-06-12 20:23:22,919 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-06-12 20:23:22,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,919 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-06-12 20:23:22,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-06-12 20:23:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:22,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,920 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:22,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-12 20:23:22,920 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:22,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1951172510, now seen corresponding path program 25 times [2021-06-12 20:23:22,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:22,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069664755] [2021-06-12 20:23:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:22,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:22,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069664755] [2021-06-12 20:23:22,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069664755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:22,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:22,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:22,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169582601] [2021-06-12 20:23:22,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:22,952 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:23,032 INFO L93 Difference]: Finished difference Result 403 states and 1103 transitions. [2021-06-12 20:23:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:23,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:23,033 INFO L225 Difference]: With dead ends: 403 [2021-06-12 20:23:23,033 INFO L226 Difference]: Without dead ends: 388 [2021-06-12 20:23:23,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-12 20:23:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 180. [2021-06-12 20:23:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-06-12 20:23:23,036 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-06-12 20:23:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:23,037 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-06-12 20:23:23,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-06-12 20:23:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:23,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:23,037 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-12 20:23:23,037 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159426, now seen corresponding path program 26 times [2021-06-12 20:23:23,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988641574] [2021-06-12 20:23:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988641574] [2021-06-12 20:23:23,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988641574] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:23,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:23,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:23,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233127548] [2021-06-12 20:23:23,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:23,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:23,096 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:23,176 INFO L93 Difference]: Finished difference Result 401 states and 1096 transitions. [2021-06-12 20:23:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:23,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:23,177 INFO L225 Difference]: With dead ends: 401 [2021-06-12 20:23:23,177 INFO L226 Difference]: Without dead ends: 386 [2021-06-12 20:23:23,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-12 20:23:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 178. [2021-06-12 20:23:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-06-12 20:23:23,181 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-06-12 20:23:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:23,181 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-06-12 20:23:23,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-06-12 20:23:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:23,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:23,181 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-12 20:23:23,182 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,182 INFO L82 PathProgramCache]: Analyzing trace with hash -962111962, now seen corresponding path program 27 times [2021-06-12 20:23:23,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884796006] [2021-06-12 20:23:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884796006] [2021-06-12 20:23:23,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884796006] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:23,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:23,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:23,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549035370] [2021-06-12 20:23:23,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:23,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:23,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:23,214 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:23,298 INFO L93 Difference]: Finished difference Result 395 states and 1075 transitions. [2021-06-12 20:23:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:23,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:23,299 INFO L225 Difference]: With dead ends: 395 [2021-06-12 20:23:23,299 INFO L226 Difference]: Without dead ends: 380 [2021-06-12 20:23:23,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-12 20:23:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 181. [2021-06-12 20:23:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9444444444444446) internal successors, (530), 180 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 530 transitions. [2021-06-12 20:23:23,302 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 530 transitions. Word has length 17 [2021-06-12 20:23:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:23,302 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 530 transitions. [2021-06-12 20:23:23,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 530 transitions. [2021-06-12 20:23:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:23,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:23,303 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-12 20:23:23,303 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2132300958, now seen corresponding path program 28 times [2021-06-12 20:23:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467074373] [2021-06-12 20:23:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467074373] [2021-06-12 20:23:23,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467074373] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:23,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:23,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:23,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431688817] [2021-06-12 20:23:23,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:23,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:23,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:23,333 INFO L87 Difference]: Start difference. First operand 181 states and 530 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:23,413 INFO L93 Difference]: Finished difference Result 379 states and 1052 transitions. [2021-06-12 20:23:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:23,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:23,414 INFO L225 Difference]: With dead ends: 379 [2021-06-12 20:23:23,414 INFO L226 Difference]: Without dead ends: 364 [2021-06-12 20:23:23,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-12 20:23:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 178. [2021-06-12 20:23:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-06-12 20:23:23,418 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-06-12 20:23:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:23,418 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-06-12 20:23:23,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-06-12 20:23:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:23,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:23,418 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-12 20:23:23,418 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2145729286, now seen corresponding path program 29 times [2021-06-12 20:23:23,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473871622] [2021-06-12 20:23:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473871622] [2021-06-12 20:23:23,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473871622] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:23,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:23,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:23,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428298461] [2021-06-12 20:23:23,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:23,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:23,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:23,453 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:23,519 INFO L93 Difference]: Finished difference Result 363 states and 1003 transitions. [2021-06-12 20:23:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:23,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:23,519 INFO L225 Difference]: With dead ends: 363 [2021-06-12 20:23:23,519 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 20:23:23,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 20:23:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 180. [2021-06-12 20:23:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-06-12 20:23:23,523 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-06-12 20:23:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:23,523 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-06-12 20:23:23,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-06-12 20:23:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:23,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:23,523 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-12 20:23:23,523 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1008954174, now seen corresponding path program 30 times [2021-06-12 20:23:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26980170] [2021-06-12 20:23:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26980170] [2021-06-12 20:23:23,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26980170] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:23,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:23,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776496724] [2021-06-12 20:23:23,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:23,556 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:23,636 INFO L93 Difference]: Finished difference Result 342 states and 965 transitions. [2021-06-12 20:23:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:23,637 INFO L225 Difference]: With dead ends: 342 [2021-06-12 20:23:23,637 INFO L226 Difference]: Without dead ends: 327 [2021-06-12 20:23:23,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-12 20:23:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 177. [2021-06-12 20:23:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-06-12 20:23:23,640 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-06-12 20:23:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:23,640 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-06-12 20:23:23,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-06-12 20:23:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:23,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:23,640 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-12 20:23:23,641 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1057121422, now seen corresponding path program 31 times [2021-06-12 20:23:23,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906418862] [2021-06-12 20:23:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906418862] [2021-06-12 20:23:23,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906418862] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:23,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:23,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:23,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195474003] [2021-06-12 20:23:23,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:23,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:23,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:23,671 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:23,747 INFO L93 Difference]: Finished difference Result 377 states and 1036 transitions. [2021-06-12 20:23:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:23,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:23,748 INFO L225 Difference]: With dead ends: 377 [2021-06-12 20:23:23,748 INFO L226 Difference]: Without dead ends: 362 [2021-06-12 20:23:23,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-12 20:23:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 186. [2021-06-12 20:23:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9513513513513514) internal successors, (546), 185 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-06-12 20:23:23,751 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-06-12 20:23:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:23,751 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-06-12 20:23:23,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-06-12 20:23:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:23,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:23,752 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-12 20:23:23,752 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2030292802, now seen corresponding path program 32 times [2021-06-12 20:23:23,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130768109] [2021-06-12 20:23:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130768109] [2021-06-12 20:23:23,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130768109] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:23,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:23,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:23,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454186115] [2021-06-12 20:23:23,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:23,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:23,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:23,800 INFO L87 Difference]: Start difference. First operand 186 states and 546 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:23,889 INFO L93 Difference]: Finished difference Result 386 states and 1062 transitions. [2021-06-12 20:23:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:23,890 INFO L225 Difference]: With dead ends: 386 [2021-06-12 20:23:23,890 INFO L226 Difference]: Without dead ends: 371 [2021-06-12 20:23:23,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-12 20:23:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2021-06-12 20:23:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.978723404255319) internal successors, (560), 188 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 560 transitions. [2021-06-12 20:23:23,894 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 560 transitions. Word has length 17 [2021-06-12 20:23:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:23,894 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 560 transitions. [2021-06-12 20:23:23,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 560 transitions. [2021-06-12 20:23:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:23,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:23,895 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-12 20:23:23,895 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,895 INFO L82 PathProgramCache]: Analyzing trace with hash 565954106, now seen corresponding path program 33 times [2021-06-12 20:23:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843945228] [2021-06-12 20:23:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843945228] [2021-06-12 20:23:23,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843945228] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:23,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:23,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:23,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338227196] [2021-06-12 20:23:23,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:23,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:23,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:23,935 INFO L87 Difference]: Start difference. First operand 189 states and 560 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:24,033 INFO L93 Difference]: Finished difference Result 393 states and 1078 transitions. [2021-06-12 20:23:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:24,034 INFO L225 Difference]: With dead ends: 393 [2021-06-12 20:23:24,035 INFO L226 Difference]: Without dead ends: 378 [2021-06-12 20:23:24,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:24,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-12 20:23:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 181. [2021-06-12 20:23:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-06-12 20:23:24,038 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-06-12 20:23:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:24,038 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-06-12 20:23:24,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-06-12 20:23:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:24,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:24,039 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:24,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-12 20:23:24,039 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:24,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2049664750, now seen corresponding path program 34 times [2021-06-12 20:23:24,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:24,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106419061] [2021-06-12 20:23:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:24,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:24,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106419061] [2021-06-12 20:23:24,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106419061] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:24,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:24,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935048104] [2021-06-12 20:23:24,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:24,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:24,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:24,074 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:24,145 INFO L93 Difference]: Finished difference Result 438 states and 1184 transitions. [2021-06-12 20:23:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:24,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:24,146 INFO L225 Difference]: With dead ends: 438 [2021-06-12 20:23:24,146 INFO L226 Difference]: Without dead ends: 423 [2021-06-12 20:23:24,146 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-12 20:23:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 185. [2021-06-12 20:23:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9456521739130435) internal successors, (542), 184 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2021-06-12 20:23:24,149 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 17 [2021-06-12 20:23:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:24,149 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2021-06-12 20:23:24,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2021-06-12 20:23:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:24,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:24,150 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:24,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-12 20:23:24,150 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash 278392308, now seen corresponding path program 35 times [2021-06-12 20:23:24,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:24,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878177781] [2021-06-12 20:23:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:24,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:24,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878177781] [2021-06-12 20:23:24,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878177781] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:24,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:24,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:24,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477953170] [2021-06-12 20:23:24,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:24,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:24,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:24,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:24,181 INFO L87 Difference]: Start difference. First operand 185 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:24,257 INFO L93 Difference]: Finished difference Result 433 states and 1175 transitions. [2021-06-12 20:23:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:24,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:24,258 INFO L225 Difference]: With dead ends: 433 [2021-06-12 20:23:24,258 INFO L226 Difference]: Without dead ends: 418 [2021-06-12 20:23:24,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-12 20:23:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 187. [2021-06-12 20:23:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9623655913978495) internal successors, (551), 186 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-06-12 20:23:24,261 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-06-12 20:23:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:24,262 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-06-12 20:23:24,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-06-12 20:23:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:24,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:24,262 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:24,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-12 20:23:24,262 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1347392328, now seen corresponding path program 36 times [2021-06-12 20:23:24,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:24,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910548599] [2021-06-12 20:23:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:24,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910548599] [2021-06-12 20:23:24,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910548599] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:24,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:24,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:24,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193297573] [2021-06-12 20:23:24,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:24,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:24,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:24,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:24,294 INFO L87 Difference]: Start difference. First operand 187 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:24,391 INFO L93 Difference]: Finished difference Result 416 states and 1145 transitions. [2021-06-12 20:23:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:24,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:24,392 INFO L225 Difference]: With dead ends: 416 [2021-06-12 20:23:24,392 INFO L226 Difference]: Without dead ends: 401 [2021-06-12 20:23:24,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-12 20:23:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 181. [2021-06-12 20:23:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-06-12 20:23:24,395 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-06-12 20:23:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:24,395 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-06-12 20:23:24,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-06-12 20:23:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:24,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:24,396 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:24,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-12 20:23:24,396 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1040697164, now seen corresponding path program 37 times [2021-06-12 20:23:24,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:24,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184098370] [2021-06-12 20:23:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:24,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:24,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184098370] [2021-06-12 20:23:24,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184098370] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:24,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:24,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:24,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969315620] [2021-06-12 20:23:24,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:24,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:24,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:24,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:24,436 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:24,519 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-06-12 20:23:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:24,520 INFO L225 Difference]: With dead ends: 437 [2021-06-12 20:23:24,520 INFO L226 Difference]: Without dead ends: 422 [2021-06-12 20:23:24,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-12 20:23:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 184. [2021-06-12 20:23:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-06-12 20:23:24,523 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-06-12 20:23:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:24,523 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-06-12 20:23:24,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-06-12 20:23:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:24,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:24,524 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:24,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-12 20:23:24,524 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:24,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2035634772, now seen corresponding path program 38 times [2021-06-12 20:23:24,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:24,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313759226] [2021-06-12 20:23:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:24,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:24,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313759226] [2021-06-12 20:23:24,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313759226] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:24,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:24,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:24,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145370089] [2021-06-12 20:23:24,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:24,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:24,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:24,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:24,557 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:24,627 INFO L93 Difference]: Finished difference Result 435 states and 1194 transitions. [2021-06-12 20:23:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:24,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:24,628 INFO L225 Difference]: With dead ends: 435 [2021-06-12 20:23:24,628 INFO L226 Difference]: Without dead ends: 420 [2021-06-12 20:23:24,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-12 20:23:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 182. [2021-06-12 20:23:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-06-12 20:23:24,631 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-06-12 20:23:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:24,631 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-06-12 20:23:24,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-06-12 20:23:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:24,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:24,632 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:24,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-06-12 20:23:24,632 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -51636616, now seen corresponding path program 39 times [2021-06-12 20:23:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:24,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920202875] [2021-06-12 20:23:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:24,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:24,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920202875] [2021-06-12 20:23:24,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920202875] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:24,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:24,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:24,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135306929] [2021-06-12 20:23:24,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:24,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:24,686 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:24,772 INFO L93 Difference]: Finished difference Result 468 states and 1258 transitions. [2021-06-12 20:23:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:24,773 INFO L225 Difference]: With dead ends: 468 [2021-06-12 20:23:24,773 INFO L226 Difference]: Without dead ends: 453 [2021-06-12 20:23:24,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-12 20:23:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 185. [2021-06-12 20:23:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9782608695652173) internal successors, (548), 184 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 548 transitions. [2021-06-12 20:23:24,777 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 548 transitions. Word has length 17 [2021-06-12 20:23:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:24,777 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 548 transitions. [2021-06-12 20:23:24,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 548 transitions. [2021-06-12 20:23:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:24,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:24,777 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:24,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-12 20:23:24,777 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1221825612, now seen corresponding path program 40 times [2021-06-12 20:23:24,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:24,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937986006] [2021-06-12 20:23:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:24,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:24,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937986006] [2021-06-12 20:23:24,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937986006] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:24,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:24,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:24,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267130122] [2021-06-12 20:23:24,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:24,815 INFO L87 Difference]: Start difference. First operand 185 states and 548 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:24,893 INFO L93 Difference]: Finished difference Result 452 states and 1235 transitions. [2021-06-12 20:23:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:24,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:24,894 INFO L225 Difference]: With dead ends: 452 [2021-06-12 20:23:24,895 INFO L226 Difference]: Without dead ends: 437 [2021-06-12 20:23:24,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-12 20:23:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 182. [2021-06-12 20:23:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-06-12 20:23:24,907 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-06-12 20:23:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:24,907 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-06-12 20:23:24,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-06-12 20:23:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:24,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:24,908 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:24,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-06-12 20:23:24,908 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1238762664, now seen corresponding path program 41 times [2021-06-12 20:23:24,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:24,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491543747] [2021-06-12 20:23:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:24,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:24,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491543747] [2021-06-12 20:23:24,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491543747] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:24,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:24,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:24,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603953145] [2021-06-12 20:23:24,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:24,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:24,947 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:25,025 INFO L93 Difference]: Finished difference Result 446 states and 1215 transitions. [2021-06-12 20:23:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:25,026 INFO L225 Difference]: With dead ends: 446 [2021-06-12 20:23:25,026 INFO L226 Difference]: Without dead ends: 431 [2021-06-12 20:23:25,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-12 20:23:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 184. [2021-06-12 20:23:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-06-12 20:23:25,030 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-06-12 20:23:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:25,030 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-06-12 20:23:25,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-06-12 20:23:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:25,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:25,030 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:25,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-06-12 20:23:25,030 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:25,031 INFO L82 PathProgramCache]: Analyzing trace with hash -98478828, now seen corresponding path program 42 times [2021-06-12 20:23:25,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:25,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740687328] [2021-06-12 20:23:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:25,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:25,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740687328] [2021-06-12 20:23:25,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740687328] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:25,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:25,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:25,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781755224] [2021-06-12 20:23:25,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:25,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:25,063 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:25,146 INFO L93 Difference]: Finished difference Result 425 states and 1177 transitions. [2021-06-12 20:23:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:25,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:25,147 INFO L225 Difference]: With dead ends: 425 [2021-06-12 20:23:25,147 INFO L226 Difference]: Without dead ends: 410 [2021-06-12 20:23:25,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:25,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-12 20:23:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 179. [2021-06-12 20:23:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9101123595505616) internal successors, (518), 178 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 518 transitions. [2021-06-12 20:23:25,150 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 518 transitions. Word has length 17 [2021-06-12 20:23:25,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:25,150 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 518 transitions. [2021-06-12 20:23:25,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 518 transitions. [2021-06-12 20:23:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:25,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:25,150 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:25,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-06-12 20:23:25,150 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:25,151 INFO L82 PathProgramCache]: Analyzing trace with hash -485249606, now seen corresponding path program 43 times [2021-06-12 20:23:25,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:25,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725909949] [2021-06-12 20:23:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:25,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725909949] [2021-06-12 20:23:25,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725909949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:25,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:25,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:25,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513065932] [2021-06-12 20:23:25,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:25,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:25,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:25,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:25,186 INFO L87 Difference]: Start difference. First operand 179 states and 518 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:25,276 INFO L93 Difference]: Finished difference Result 323 states and 889 transitions. [2021-06-12 20:23:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:25,277 INFO L225 Difference]: With dead ends: 323 [2021-06-12 20:23:25,277 INFO L226 Difference]: Without dead ends: 308 [2021-06-12 20:23:25,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-12 20:23:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 187. [2021-06-12 20:23:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-06-12 20:23:25,280 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 17 [2021-06-12 20:23:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:25,280 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-06-12 20:23:25,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-06-12 20:23:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:25,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:25,281 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:25,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-06-12 20:23:25,281 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:25,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2038445248, now seen corresponding path program 44 times [2021-06-12 20:23:25,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:25,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869333051] [2021-06-12 20:23:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:25,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:25,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869333051] [2021-06-12 20:23:25,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869333051] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:25,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:25,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:25,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845991982] [2021-06-12 20:23:25,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:25,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:25,323 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:25,424 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-06-12 20:23:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:25,425 INFO L225 Difference]: With dead ends: 353 [2021-06-12 20:23:25,425 INFO L226 Difference]: Without dead ends: 338 [2021-06-12 20:23:25,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-12 20:23:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 189. [2021-06-12 20:23:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-06-12 20:23:25,428 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-06-12 20:23:25,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:25,428 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-06-12 20:23:25,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-06-12 20:23:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:25,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:25,429 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:25,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-06-12 20:23:25,429 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:25,430 INFO L82 PathProgramCache]: Analyzing trace with hash 412660612, now seen corresponding path program 45 times [2021-06-12 20:23:25,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:25,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130101520] [2021-06-12 20:23:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:25,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:25,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130101520] [2021-06-12 20:23:25,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130101520] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:25,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:25,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:25,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705413145] [2021-06-12 20:23:25,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:25,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:25,465 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:25,552 INFO L93 Difference]: Finished difference Result 336 states and 921 transitions. [2021-06-12 20:23:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:25,553 INFO L225 Difference]: With dead ends: 336 [2021-06-12 20:23:25,553 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 20:23:25,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 20:23:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-06-12 20:23:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.901098901098901) internal successors, (528), 182 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 528 transitions. [2021-06-12 20:23:25,556 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 528 transitions. Word has length 17 [2021-06-12 20:23:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:25,556 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 528 transitions. [2021-06-12 20:23:25,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 528 transitions. [2021-06-12 20:23:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:25,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:25,557 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:25,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-06-12 20:23:25,557 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash 379489126, now seen corresponding path program 46 times [2021-06-12 20:23:25,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:25,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499632427] [2021-06-12 20:23:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:25,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:25,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499632427] [2021-06-12 20:23:25,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499632427] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:25,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:25,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:25,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944212556] [2021-06-12 20:23:25,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:25,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:25,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:25,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:25,596 INFO L87 Difference]: Start difference. First operand 183 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:25,676 INFO L93 Difference]: Finished difference Result 324 states and 889 transitions. [2021-06-12 20:23:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:25,677 INFO L225 Difference]: With dead ends: 324 [2021-06-12 20:23:25,677 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 20:23:25,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 20:23:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2021-06-12 20:23:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-06-12 20:23:25,680 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-06-12 20:23:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:25,680 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-06-12 20:23:25,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-06-12 20:23:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:25,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:25,681 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:25,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-06-12 20:23:25,681 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1252190110, now seen corresponding path program 47 times [2021-06-12 20:23:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:25,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201120342] [2021-06-12 20:23:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:25,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:25,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201120342] [2021-06-12 20:23:25,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201120342] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:25,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:25,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:25,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468935109] [2021-06-12 20:23:25,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:25,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:25,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:25,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:25,721 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:25,802 INFO L93 Difference]: Finished difference Result 354 states and 954 transitions. [2021-06-12 20:23:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:25,803 INFO L225 Difference]: With dead ends: 354 [2021-06-12 20:23:25,803 INFO L226 Difference]: Without dead ends: 339 [2021-06-12 20:23:25,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-12 20:23:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 191. [2021-06-12 20:23:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.905263157894737) internal successors, (552), 190 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 552 transitions. [2021-06-12 20:23:25,806 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 552 transitions. Word has length 17 [2021-06-12 20:23:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:25,806 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 552 transitions. [2021-06-12 20:23:25,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 552 transitions. [2021-06-12 20:23:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:25,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:25,807 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:25,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-12 20:23:25,807 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:25,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1416992550, now seen corresponding path program 48 times [2021-06-12 20:23:25,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:25,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111118007] [2021-06-12 20:23:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:25,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:25,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111118007] [2021-06-12 20:23:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111118007] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:25,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:25,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:25,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917675409] [2021-06-12 20:23:25,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:25,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:25,852 INFO L87 Difference]: Start difference. First operand 191 states and 552 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:25,931 INFO L93 Difference]: Finished difference Result 333 states and 916 transitions. [2021-06-12 20:23:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:25,932 INFO L225 Difference]: With dead ends: 333 [2021-06-12 20:23:25,932 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 20:23:25,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 20:23:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 189. [2021-06-12 20:23:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-06-12 20:23:25,935 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-06-12 20:23:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:25,935 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-06-12 20:23:25,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-06-12 20:23:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:25,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:25,936 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:25,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-12 20:23:25,936 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:25,936 INFO L82 PathProgramCache]: Analyzing trace with hash -167418646, now seen corresponding path program 49 times [2021-06-12 20:23:25,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:25,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960336546] [2021-06-12 20:23:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:25,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:25,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960336546] [2021-06-12 20:23:25,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960336546] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:25,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:25,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491947376] [2021-06-12 20:23:25,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:25,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:25,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:25,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:25,976 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,064 INFO L93 Difference]: Finished difference Result 386 states and 1068 transitions. [2021-06-12 20:23:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:26,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,065 INFO L225 Difference]: With dead ends: 386 [2021-06-12 20:23:26,065 INFO L226 Difference]: Without dead ends: 371 [2021-06-12 20:23:26,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-12 20:23:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 194. [2021-06-12 20:23:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.922279792746114) internal successors, (564), 193 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions. [2021-06-12 20:23:26,068 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 17 [2021-06-12 20:23:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,068 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 564 transitions. [2021-06-12 20:23:26,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions. [2021-06-12 20:23:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:26,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,069 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-06-12 20:23:26,069 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1386054006, now seen corresponding path program 50 times [2021-06-12 20:23:26,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115684638] [2021-06-12 20:23:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115684638] [2021-06-12 20:23:26,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115684638] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:26,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:26,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:26,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628914135] [2021-06-12 20:23:26,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:26,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:26,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:26,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:26,101 INFO L87 Difference]: Start difference. First operand 194 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,178 INFO L93 Difference]: Finished difference Result 390 states and 1074 transitions. [2021-06-12 20:23:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,181 INFO L225 Difference]: With dead ends: 390 [2021-06-12 20:23:26,181 INFO L226 Difference]: Without dead ends: 375 [2021-06-12 20:23:26,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-12 20:23:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 192. [2021-06-12 20:23:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-06-12 20:23:26,184 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-06-12 20:23:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,184 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-06-12 20:23:26,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-06-12 20:23:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:26,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,185 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-06-12 20:23:26,185 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash -310342850, now seen corresponding path program 51 times [2021-06-12 20:23:26,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459381533] [2021-06-12 20:23:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459381533] [2021-06-12 20:23:26,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459381533] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:26,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:26,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:26,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092898008] [2021-06-12 20:23:26,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:26,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:26,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:26,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:26,231 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,312 INFO L93 Difference]: Finished difference Result 386 states and 1060 transitions. [2021-06-12 20:23:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,313 INFO L225 Difference]: With dead ends: 386 [2021-06-12 20:23:26,313 INFO L226 Difference]: Without dead ends: 371 [2021-06-12 20:23:26,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-12 20:23:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-06-12 20:23:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-06-12 20:23:26,316 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-06-12 20:23:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,316 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-06-12 20:23:26,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-06-12 20:23:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:26,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,317 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-06-12 20:23:26,317 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash -548101402, now seen corresponding path program 52 times [2021-06-12 20:23:26,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634192777] [2021-06-12 20:23:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634192777] [2021-06-12 20:23:26,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634192777] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:26,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:26,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:26,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780369762] [2021-06-12 20:23:26,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:26,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:26,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:26,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:26,356 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,432 INFO L93 Difference]: Finished difference Result 464 states and 1256 transitions. [2021-06-12 20:23:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:26,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,433 INFO L225 Difference]: With dead ends: 464 [2021-06-12 20:23:26,433 INFO L226 Difference]: Without dead ends: 449 [2021-06-12 20:23:26,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-12 20:23:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-06-12 20:23:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-06-12 20:23:26,437 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-06-12 20:23:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,437 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-06-12 20:23:26,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-06-12 20:23:26,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:26,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,437 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-06-12 20:23:26,438 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1766736762, now seen corresponding path program 53 times [2021-06-12 20:23:26,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19782094] [2021-06-12 20:23:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19782094] [2021-06-12 20:23:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19782094] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:26,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:26,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:26,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596900725] [2021-06-12 20:23:26,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:26,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:26,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:26,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:26,473 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,572 INFO L93 Difference]: Finished difference Result 468 states and 1262 transitions. [2021-06-12 20:23:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:26,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,573 INFO L225 Difference]: With dead ends: 468 [2021-06-12 20:23:26,573 INFO L226 Difference]: Without dead ends: 453 [2021-06-12 20:23:26,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-12 20:23:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 193. [2021-06-12 20:23:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-06-12 20:23:26,576 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-06-12 20:23:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,576 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-06-12 20:23:26,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-06-12 20:23:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:26,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,577 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-06-12 20:23:26,577 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash 440959146, now seen corresponding path program 54 times [2021-06-12 20:23:26,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413151969] [2021-06-12 20:23:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413151969] [2021-06-12 20:23:26,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413151969] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:26,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:26,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:26,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854783494] [2021-06-12 20:23:26,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:26,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:26,610 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,679 INFO L93 Difference]: Finished difference Result 431 states and 1182 transitions. [2021-06-12 20:23:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,679 INFO L225 Difference]: With dead ends: 431 [2021-06-12 20:23:26,680 INFO L226 Difference]: Without dead ends: 416 [2021-06-12 20:23:26,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-12 20:23:26,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2021-06-12 20:23:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.948717948717949) internal successors, (575), 195 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 575 transitions. [2021-06-12 20:23:26,683 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 575 transitions. Word has length 17 [2021-06-12 20:23:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,683 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 575 transitions. [2021-06-12 20:23:26,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 575 transitions. [2021-06-12 20:23:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:26,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,684 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-06-12 20:23:26,684 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash -729229850, now seen corresponding path program 55 times [2021-06-12 20:23:26,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269608155] [2021-06-12 20:23:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269608155] [2021-06-12 20:23:26,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269608155] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:26,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:26,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:26,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215473405] [2021-06-12 20:23:26,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:26,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:26,719 INFO L87 Difference]: Start difference. First operand 196 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,794 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-06-12 20:23:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,795 INFO L225 Difference]: With dead ends: 415 [2021-06-12 20:23:26,795 INFO L226 Difference]: Without dead ends: 400 [2021-06-12 20:23:26,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-12 20:23:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 193. [2021-06-12 20:23:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-06-12 20:23:26,798 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-06-12 20:23:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,798 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-06-12 20:23:26,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-06-12 20:23:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:26,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,799 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-06-12 20:23:26,799 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,799 INFO L82 PathProgramCache]: Analyzing trace with hash -746166902, now seen corresponding path program 56 times [2021-06-12 20:23:26,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141942036] [2021-06-12 20:23:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141942036] [2021-06-12 20:23:26,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141942036] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:26,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:26,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:26,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761753075] [2021-06-12 20:23:26,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:26,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:26,834 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,913 INFO L93 Difference]: Finished difference Result 449 states and 1229 transitions. [2021-06-12 20:23:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:26,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,914 INFO L225 Difference]: With dead ends: 449 [2021-06-12 20:23:26,914 INFO L226 Difference]: Without dead ends: 434 [2021-06-12 20:23:26,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-12 20:23:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 195. [2021-06-12 20:23:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-06-12 20:23:26,918 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-06-12 20:23:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,918 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-06-12 20:23:26,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-06-12 20:23:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:26,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,918 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-06-12 20:23:26,918 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash 394116934, now seen corresponding path program 57 times [2021-06-12 20:23:26,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994788301] [2021-06-12 20:23:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994788301] [2021-06-12 20:23:26,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994788301] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:26,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:26,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:26,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769531881] [2021-06-12 20:23:26,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:26,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:26,954 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:27,038 INFO L93 Difference]: Finished difference Result 428 states and 1191 transitions. [2021-06-12 20:23:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:27,039 INFO L225 Difference]: With dead ends: 428 [2021-06-12 20:23:27,039 INFO L226 Difference]: Without dead ends: 413 [2021-06-12 20:23:27,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-12 20:23:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 192. [2021-06-12 20:23:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-06-12 20:23:27,042 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-06-12 20:23:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:27,042 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-06-12 20:23:27,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-06-12 20:23:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:27,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:27,043 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:27,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-06-12 20:23:27,043 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:27,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:27,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1262551738, now seen corresponding path program 58 times [2021-06-12 20:23:27,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:27,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256674587] [2021-06-12 20:23:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:27,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:27,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256674587] [2021-06-12 20:23:27,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256674587] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:27,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:27,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:27,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641774824] [2021-06-12 20:23:27,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:27,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:27,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:27,073 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:27,145 INFO L93 Difference]: Finished difference Result 429 states and 1161 transitions. [2021-06-12 20:23:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:27,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:27,146 INFO L225 Difference]: With dead ends: 429 [2021-06-12 20:23:27,146 INFO L226 Difference]: Without dead ends: 414 [2021-06-12 20:23:27,146 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-12 20:23:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 194. [2021-06-12 20:23:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.911917098445596) internal successors, (562), 193 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 562 transitions. [2021-06-12 20:23:27,150 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 562 transitions. Word has length 17 [2021-06-12 20:23:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:27,150 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 562 transitions. [2021-06-12 20:23:27,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 562 transitions. [2021-06-12 20:23:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:27,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:27,150 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:27,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-06-12 20:23:27,150 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:27,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2074864322, now seen corresponding path program 59 times [2021-06-12 20:23:27,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:27,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009721636] [2021-06-12 20:23:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:27,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:27,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009721636] [2021-06-12 20:23:27,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009721636] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:27,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:27,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:27,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575585501] [2021-06-12 20:23:27,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:27,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:27,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:27,185 INFO L87 Difference]: Start difference. First operand 194 states and 562 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:27,274 INFO L93 Difference]: Finished difference Result 430 states and 1172 transitions. [2021-06-12 20:23:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:27,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:27,275 INFO L225 Difference]: With dead ends: 430 [2021-06-12 20:23:27,275 INFO L226 Difference]: Without dead ends: 415 [2021-06-12 20:23:27,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:27,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-12 20:23:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 196. [2021-06-12 20:23:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.928205128205128) internal successors, (571), 195 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 571 transitions. [2021-06-12 20:23:27,279 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 571 transitions. Word has length 17 [2021-06-12 20:23:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:27,279 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 571 transitions. [2021-06-12 20:23:27,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 571 transitions. [2021-06-12 20:23:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:27,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:27,280 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:27,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-06-12 20:23:27,280 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash -934580486, now seen corresponding path program 60 times [2021-06-12 20:23:27,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:27,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208718669] [2021-06-12 20:23:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:27,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:27,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208718669] [2021-06-12 20:23:27,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208718669] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:27,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:27,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:27,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015208227] [2021-06-12 20:23:27,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:27,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:27,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:27,321 INFO L87 Difference]: Start difference. First operand 196 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:27,415 INFO L93 Difference]: Finished difference Result 409 states and 1134 transitions. [2021-06-12 20:23:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:27,416 INFO L225 Difference]: With dead ends: 409 [2021-06-12 20:23:27,416 INFO L226 Difference]: Without dead ends: 394 [2021-06-12 20:23:27,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-12 20:23:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 192. [2021-06-12 20:23:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-06-12 20:23:27,419 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-06-12 20:23:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:27,419 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-06-12 20:23:27,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-06-12 20:23:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:27,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:27,420 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:27,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-06-12 20:23:27,420 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash -674451760, now seen corresponding path program 61 times [2021-06-12 20:23:27,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:27,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203523954] [2021-06-12 20:23:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:27,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:27,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203523954] [2021-06-12 20:23:27,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203523954] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:27,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:27,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:27,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537982026] [2021-06-12 20:23:27,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:27,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:27,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:27,450 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:27,541 INFO L93 Difference]: Finished difference Result 328 states and 903 transitions. [2021-06-12 20:23:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:27,542 INFO L225 Difference]: With dead ends: 328 [2021-06-12 20:23:27,542 INFO L226 Difference]: Without dead ends: 313 [2021-06-12 20:23:27,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-12 20:23:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 197. [2021-06-12 20:23:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-06-12 20:23:27,545 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-06-12 20:23:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:27,545 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-06-12 20:23:27,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-06-12 20:23:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:27,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:27,546 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:27,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-06-12 20:23:27,546 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:27,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:27,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1924375180, now seen corresponding path program 62 times [2021-06-12 20:23:27,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:27,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251331338] [2021-06-12 20:23:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:27,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:27,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251331338] [2021-06-12 20:23:27,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251331338] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:27,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:27,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:27,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908470102] [2021-06-12 20:23:27,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:27,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:27,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:27,583 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:27,672 INFO L93 Difference]: Finished difference Result 357 states and 963 transitions. [2021-06-12 20:23:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:27,673 INFO L225 Difference]: With dead ends: 357 [2021-06-12 20:23:27,673 INFO L226 Difference]: Without dead ends: 342 [2021-06-12 20:23:27,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-12 20:23:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 199. [2021-06-12 20:23:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-06-12 20:23:27,676 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-06-12 20:23:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:27,676 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-06-12 20:23:27,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-06-12 20:23:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:27,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:27,677 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:27,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-06-12 20:23:27,677 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:27,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:27,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1151956756, now seen corresponding path program 63 times [2021-06-12 20:23:27,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:27,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877945908] [2021-06-12 20:23:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:27,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877945908] [2021-06-12 20:23:27,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877945908] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:27,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:27,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:27,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268159419] [2021-06-12 20:23:27,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:27,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:27,713 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:27,816 INFO L93 Difference]: Finished difference Result 334 states and 918 transitions. [2021-06-12 20:23:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:27,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:27,817 INFO L225 Difference]: With dead ends: 334 [2021-06-12 20:23:27,817 INFO L226 Difference]: Without dead ends: 319 [2021-06-12 20:23:27,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-12 20:23:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-06-12 20:23:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-06-12 20:23:27,820 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-06-12 20:23:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:27,820 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-06-12 20:23:27,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-06-12 20:23:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:27,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:27,820 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:27,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-06-12 20:23:27,821 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash 263807996, now seen corresponding path program 64 times [2021-06-12 20:23:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:27,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548928398] [2021-06-12 20:23:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:27,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548928398] [2021-06-12 20:23:27,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548928398] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:27,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:27,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:27,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361548252] [2021-06-12 20:23:27,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:27,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:27,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:27,858 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:27,946 INFO L93 Difference]: Finished difference Result 349 states and 945 transitions. [2021-06-12 20:23:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:27,947 INFO L225 Difference]: With dead ends: 349 [2021-06-12 20:23:27,947 INFO L226 Difference]: Without dead ends: 334 [2021-06-12 20:23:27,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-12 20:23:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 199. [2021-06-12 20:23:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-06-12 20:23:27,950 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-06-12 20:23:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:27,950 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-06-12 20:23:27,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:27,950 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-06-12 20:23:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:27,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:27,951 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:27,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-06-12 20:23:27,951 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:27,951 INFO L82 PathProgramCache]: Analyzing trace with hash -954827364, now seen corresponding path program 65 times [2021-06-12 20:23:27,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:27,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162282086] [2021-06-12 20:23:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:27,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:27,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162282086] [2021-06-12 20:23:27,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162282086] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:27,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:27,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:27,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819014443] [2021-06-12 20:23:27,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:27,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:27,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:27,985 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:28,074 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-06-12 20:23:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:28,075 INFO L225 Difference]: With dead ends: 353 [2021-06-12 20:23:28,075 INFO L226 Difference]: Without dead ends: 338 [2021-06-12 20:23:28,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-12 20:23:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2021-06-12 20:23:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-06-12 20:23:28,078 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-06-12 20:23:28,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:28,078 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-06-12 20:23:28,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-06-12 20:23:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:28,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:28,079 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:28,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-06-12 20:23:28,079 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:28,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:28,079 INFO L82 PathProgramCache]: Analyzing trace with hash 120883792, now seen corresponding path program 66 times [2021-06-12 20:23:28,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:28,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865049369] [2021-06-12 20:23:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:28,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:28,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865049369] [2021-06-12 20:23:28,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865049369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:28,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:28,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:28,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489398394] [2021-06-12 20:23:28,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:28,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:28,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:28,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:28,111 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:28,208 INFO L93 Difference]: Finished difference Result 324 states and 891 transitions. [2021-06-12 20:23:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:28,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:28,209 INFO L225 Difference]: With dead ends: 324 [2021-06-12 20:23:28,209 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 20:23:28,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 20:23:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2021-06-12 20:23:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-06-12 20:23:28,212 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-06-12 20:23:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:28,212 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-06-12 20:23:28,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-06-12 20:23:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:28,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:28,212 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:28,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-06-12 20:23:28,213 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash 409284692, now seen corresponding path program 67 times [2021-06-12 20:23:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:28,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405285452] [2021-06-12 20:23:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:28,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:28,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405285452] [2021-06-12 20:23:28,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405285452] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:28,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:28,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:28,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441015458] [2021-06-12 20:23:28,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:28,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:28,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:28,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:28,245 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:28,337 INFO L93 Difference]: Finished difference Result 442 states and 1201 transitions. [2021-06-12 20:23:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:28,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:28,339 INFO L225 Difference]: With dead ends: 442 [2021-06-12 20:23:28,340 INFO L226 Difference]: Without dead ends: 427 [2021-06-12 20:23:28,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-12 20:23:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 198. [2021-06-12 20:23:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-06-12 20:23:28,349 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-06-12 20:23:28,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:28,350 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-06-12 20:23:28,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-06-12 20:23:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:28,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:28,350 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:28,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-06-12 20:23:28,350 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash -840638728, now seen corresponding path program 68 times [2021-06-12 20:23:28,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:28,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122920272] [2021-06-12 20:23:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:28,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:28,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122920272] [2021-06-12 20:23:28,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122920272] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:28,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:28,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:28,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658164686] [2021-06-12 20:23:28,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:28,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:28,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:28,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:28,388 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:28,476 INFO L93 Difference]: Finished difference Result 465 states and 1248 transitions. [2021-06-12 20:23:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:28,477 INFO L225 Difference]: With dead ends: 465 [2021-06-12 20:23:28,477 INFO L226 Difference]: Without dead ends: 450 [2021-06-12 20:23:28,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-12 20:23:28,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 200. [2021-06-12 20:23:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-06-12 20:23:28,481 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-06-12 20:23:28,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:28,481 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-06-12 20:23:28,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-06-12 20:23:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:28,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:28,481 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:28,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-06-12 20:23:28,482 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2059274088, now seen corresponding path program 69 times [2021-06-12 20:23:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:28,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442228745] [2021-06-12 20:23:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:28,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:28,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442228745] [2021-06-12 20:23:28,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442228745] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:28,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:28,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:28,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784701308] [2021-06-12 20:23:28,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:28,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:28,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:28,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:28,520 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:28,619 INFO L93 Difference]: Finished difference Result 442 states and 1203 transitions. [2021-06-12 20:23:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:28,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:28,620 INFO L225 Difference]: With dead ends: 442 [2021-06-12 20:23:28,620 INFO L226 Difference]: Without dead ends: 427 [2021-06-12 20:23:28,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-12 20:23:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 196. [2021-06-12 20:23:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-06-12 20:23:28,624 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-06-12 20:23:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:28,624 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-06-12 20:23:28,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-06-12 20:23:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:28,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:28,626 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:28,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-06-12 20:23:28,626 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:28,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1005390608, now seen corresponding path program 70 times [2021-06-12 20:23:28,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:28,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538544039] [2021-06-12 20:23:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:28,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:28,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538544039] [2021-06-12 20:23:28,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538544039] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:28,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:28,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:28,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333968720] [2021-06-12 20:23:28,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:28,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:28,658 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:28,737 INFO L93 Difference]: Finished difference Result 393 states and 1085 transitions. [2021-06-12 20:23:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:28,738 INFO L225 Difference]: With dead ends: 393 [2021-06-12 20:23:28,738 INFO L226 Difference]: Without dead ends: 378 [2021-06-12 20:23:28,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-12 20:23:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 199. [2021-06-12 20:23:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-06-12 20:23:28,741 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-06-12 20:23:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:28,741 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-06-12 20:23:28,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-06-12 20:23:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:28,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:28,742 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:28,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-06-12 20:23:28,742 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:28,742 INFO L82 PathProgramCache]: Analyzing trace with hash 184219092, now seen corresponding path program 71 times [2021-06-12 20:23:28,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:28,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563471454] [2021-06-12 20:23:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:28,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:28,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563471454] [2021-06-12 20:23:28,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563471454] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:28,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:28,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:28,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274671590] [2021-06-12 20:23:28,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:28,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:28,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:28,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:28,776 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:28,855 INFO L93 Difference]: Finished difference Result 391 states and 1089 transitions. [2021-06-12 20:23:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:28,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:28,856 INFO L225 Difference]: With dead ends: 391 [2021-06-12 20:23:28,856 INFO L226 Difference]: Without dead ends: 376 [2021-06-12 20:23:28,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-12 20:23:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 202. [2021-06-12 20:23:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.955223880597015) internal successors, (594), 201 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 594 transitions. [2021-06-12 20:23:28,859 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 594 transitions. Word has length 17 [2021-06-12 20:23:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:28,859 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 594 transitions. [2021-06-12 20:23:28,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 594 transitions. [2021-06-12 20:23:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:28,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:28,859 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:28,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-06-12 20:23:28,860 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:28,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1514501296, now seen corresponding path program 72 times [2021-06-12 20:23:28,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:28,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410217202] [2021-06-12 20:23:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:28,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:28,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410217202] [2021-06-12 20:23:28,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410217202] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:28,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:28,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:28,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011138627] [2021-06-12 20:23:28,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:28,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:28,902 INFO L87 Difference]: Start difference. First operand 202 states and 594 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:28,992 INFO L93 Difference]: Finished difference Result 368 states and 1044 transitions. [2021-06-12 20:23:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:28,993 INFO L225 Difference]: With dead ends: 368 [2021-06-12 20:23:28,993 INFO L226 Difference]: Without dead ends: 353 [2021-06-12 20:23:28,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-12 20:23:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 196. [2021-06-12 20:23:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-06-12 20:23:28,996 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-06-12 20:23:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:28,996 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-06-12 20:23:28,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-06-12 20:23:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:28,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:28,997 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:28,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-06-12 20:23:28,997 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:28,997 INFO L82 PathProgramCache]: Analyzing trace with hash 81063412, now seen corresponding path program 73 times [2021-06-12 20:23:28,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:28,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930567730] [2021-06-12 20:23:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:29,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930567730] [2021-06-12 20:23:29,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930567730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:29,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:29,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:29,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844110547] [2021-06-12 20:23:29,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:29,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:29,029 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:29,129 INFO L93 Difference]: Finished difference Result 445 states and 1229 transitions. [2021-06-12 20:23:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:29,130 INFO L225 Difference]: With dead ends: 445 [2021-06-12 20:23:29,130 INFO L226 Difference]: Without dead ends: 430 [2021-06-12 20:23:29,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-12 20:23:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 199. [2021-06-12 20:23:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-06-12 20:23:29,135 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-06-12 20:23:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:29,135 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-06-12 20:23:29,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-06-12 20:23:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:29,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:29,136 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:29,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-06-12 20:23:29,136 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:29,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1137571948, now seen corresponding path program 74 times [2021-06-12 20:23:29,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:29,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186699392] [2021-06-12 20:23:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:29,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:29,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186699392] [2021-06-12 20:23:29,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186699392] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:29,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:29,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:29,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637625169] [2021-06-12 20:23:29,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:29,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:29,169 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:29,263 INFO L93 Difference]: Finished difference Result 443 states and 1222 transitions. [2021-06-12 20:23:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:29,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:29,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:29,265 INFO L225 Difference]: With dead ends: 443 [2021-06-12 20:23:29,265 INFO L226 Difference]: Without dead ends: 428 [2021-06-12 20:23:29,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-12 20:23:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 197. [2021-06-12 20:23:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-06-12 20:23:29,268 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-06-12 20:23:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:29,268 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-06-12 20:23:29,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-06-12 20:23:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:29,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:29,268 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:29,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-06-12 20:23:29,268 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:29,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1070123960, now seen corresponding path program 75 times [2021-06-12 20:23:29,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:29,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264182620] [2021-06-12 20:23:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:29,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:29,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264182620] [2021-06-12 20:23:29,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264182620] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:29,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:29,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:29,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950681804] [2021-06-12 20:23:29,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:29,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:29,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:29,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:29,301 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:29,385 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-06-12 20:23:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:29,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:29,386 INFO L225 Difference]: With dead ends: 437 [2021-06-12 20:23:29,386 INFO L226 Difference]: Without dead ends: 422 [2021-06-12 20:23:29,386 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-12 20:23:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 200. [2021-06-12 20:23:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-06-12 20:23:29,390 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-06-12 20:23:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:29,390 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-06-12 20:23:29,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-06-12 20:23:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:29,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:29,390 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:29,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-06-12 20:23:29,390 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:29,391 INFO L82 PathProgramCache]: Analyzing trace with hash -100065036, now seen corresponding path program 76 times [2021-06-12 20:23:29,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:29,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548511702] [2021-06-12 20:23:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:29,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:29,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548511702] [2021-06-12 20:23:29,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548511702] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:29,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:29,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:29,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388147232] [2021-06-12 20:23:29,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:29,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:29,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:29,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:29,425 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:29,514 INFO L93 Difference]: Finished difference Result 421 states and 1178 transitions. [2021-06-12 20:23:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:29,515 INFO L225 Difference]: With dead ends: 421 [2021-06-12 20:23:29,515 INFO L226 Difference]: Without dead ends: 406 [2021-06-12 20:23:29,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-12 20:23:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 197. [2021-06-12 20:23:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-06-12 20:23:29,518 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-06-12 20:23:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:29,518 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-06-12 20:23:29,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-06-12 20:23:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:29,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:29,519 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:29,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-12 20:23:29,519 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash -117002088, now seen corresponding path program 77 times [2021-06-12 20:23:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:29,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530709475] [2021-06-12 20:23:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:29,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:29,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530709475] [2021-06-12 20:23:29,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530709475] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:29,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:29,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:29,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104188879] [2021-06-12 20:23:29,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:29,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:29,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:29,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:29,552 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:29,631 INFO L93 Difference]: Finished difference Result 405 states and 1129 transitions. [2021-06-12 20:23:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:29,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:29,632 INFO L225 Difference]: With dead ends: 405 [2021-06-12 20:23:29,632 INFO L226 Difference]: Without dead ends: 390 [2021-06-12 20:23:29,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-12 20:23:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 199. [2021-06-12 20:23:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-06-12 20:23:29,635 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-06-12 20:23:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:29,635 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-06-12 20:23:29,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-06-12 20:23:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:29,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:29,636 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:29,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-06-12 20:23:29,636 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:29,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1023281748, now seen corresponding path program 78 times [2021-06-12 20:23:29,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:29,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992564210] [2021-06-12 20:23:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:29,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:29,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992564210] [2021-06-12 20:23:29,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992564210] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:29,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:29,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925951404] [2021-06-12 20:23:29,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:29,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:29,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:29,672 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:29,749 INFO L93 Difference]: Finished difference Result 384 states and 1091 transitions. [2021-06-12 20:23:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:29,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:29,750 INFO L225 Difference]: With dead ends: 384 [2021-06-12 20:23:29,750 INFO L226 Difference]: Without dead ends: 369 [2021-06-12 20:23:29,750 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-12 20:23:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 195. [2021-06-12 20:23:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-06-12 20:23:29,753 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-06-12 20:23:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:29,753 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-06-12 20:23:29,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-06-12 20:23:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:29,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:29,753 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:29,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-06-12 20:23:29,753 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1228196736, now seen corresponding path program 79 times [2021-06-12 20:23:29,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:29,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062668852] [2021-06-12 20:23:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:29,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:29,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062668852] [2021-06-12 20:23:29,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062668852] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:29,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:29,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:29,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245525769] [2021-06-12 20:23:29,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:29,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:29,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:29,787 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:29,874 INFO L93 Difference]: Finished difference Result 425 states and 1163 transitions. [2021-06-12 20:23:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:29,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:29,876 INFO L225 Difference]: With dead ends: 425 [2021-06-12 20:23:29,876 INFO L226 Difference]: Without dead ends: 410 [2021-06-12 20:23:29,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-12 20:23:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 200. [2021-06-12 20:23:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-06-12 20:23:29,879 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-06-12 20:23:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:29,879 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-06-12 20:23:29,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-06-12 20:23:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:29,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:29,879 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:29,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-06-12 20:23:29,879 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:29,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:29,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1848135200, now seen corresponding path program 80 times [2021-06-12 20:23:29,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:29,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932018379] [2021-06-12 20:23:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:29,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:29,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932018379] [2021-06-12 20:23:29,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932018379] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:29,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:29,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:29,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379953521] [2021-06-12 20:23:29,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:29,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:29,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:29,918 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:30,011 INFO L93 Difference]: Finished difference Result 429 states and 1169 transitions. [2021-06-12 20:23:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:30,012 INFO L225 Difference]: With dead ends: 429 [2021-06-12 20:23:30,012 INFO L226 Difference]: Without dead ends: 414 [2021-06-12 20:23:30,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-12 20:23:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 198. [2021-06-12 20:23:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-06-12 20:23:30,015 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-06-12 20:23:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:30,015 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-06-12 20:23:30,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-06-12 20:23:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:30,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:30,015 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:30,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-06-12 20:23:30,016 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1371120940, now seen corresponding path program 81 times [2021-06-12 20:23:30,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:30,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238706257] [2021-06-12 20:23:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:30,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:30,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238706257] [2021-06-12 20:23:30,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238706257] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:30,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:30,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:30,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201612384] [2021-06-12 20:23:30,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:30,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:30,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:30,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:30,054 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:30,151 INFO L93 Difference]: Finished difference Result 429 states and 1163 transitions. [2021-06-12 20:23:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:30,152 INFO L225 Difference]: With dead ends: 429 [2021-06-12 20:23:30,152 INFO L226 Difference]: Without dead ends: 414 [2021-06-12 20:23:30,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-12 20:23:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 196. [2021-06-12 20:23:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-06-12 20:23:30,155 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-06-12 20:23:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:30,155 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-06-12 20:23:30,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-06-12 20:23:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:30,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:30,156 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:30,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-06-12 20:23:30,156 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1608879492, now seen corresponding path program 82 times [2021-06-12 20:23:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:30,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283372876] [2021-06-12 20:23:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:30,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:30,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283372876] [2021-06-12 20:23:30,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283372876] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:30,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:30,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:30,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736387067] [2021-06-12 20:23:30,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:30,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:30,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:30,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:30,195 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:30,278 INFO L93 Difference]: Finished difference Result 451 states and 1224 transitions. [2021-06-12 20:23:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:30,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:30,278 INFO L225 Difference]: With dead ends: 451 [2021-06-12 20:23:30,279 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 20:23:30,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 20:23:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 199. [2021-06-12 20:23:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-06-12 20:23:30,282 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-06-12 20:23:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:30,282 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-06-12 20:23:30,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-06-12 20:23:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:30,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:30,282 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:30,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-06-12 20:23:30,282 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:30,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1467452444, now seen corresponding path program 83 times [2021-06-12 20:23:30,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:30,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221481754] [2021-06-12 20:23:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:30,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:30,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221481754] [2021-06-12 20:23:30,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221481754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:30,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:30,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:30,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844247145] [2021-06-12 20:23:30,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:30,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:30,315 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:30,399 INFO L93 Difference]: Finished difference Result 455 states and 1230 transitions. [2021-06-12 20:23:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:30,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:30,400 INFO L225 Difference]: With dead ends: 455 [2021-06-12 20:23:30,400 INFO L226 Difference]: Without dead ends: 440 [2021-06-12 20:23:30,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-12 20:23:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 197. [2021-06-12 20:23:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-06-12 20:23:30,403 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-06-12 20:23:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:30,403 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-06-12 20:23:30,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-06-12 20:23:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:30,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:30,404 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:30,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-06-12 20:23:30,404 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash -619818944, now seen corresponding path program 84 times [2021-06-12 20:23:30,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:30,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59944316] [2021-06-12 20:23:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:30,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:30,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59944316] [2021-06-12 20:23:30,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59944316] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:30,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:30,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:30,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319515087] [2021-06-12 20:23:30,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:30,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:30,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:30,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:30,438 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:30,525 INFO L93 Difference]: Finished difference Result 422 states and 1158 transitions. [2021-06-12 20:23:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:30,526 INFO L225 Difference]: With dead ends: 422 [2021-06-12 20:23:30,526 INFO L226 Difference]: Without dead ends: 407 [2021-06-12 20:23:30,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-12 20:23:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 200. [2021-06-12 20:23:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-06-12 20:23:30,529 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-06-12 20:23:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:30,529 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-06-12 20:23:30,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-06-12 20:23:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:30,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:30,530 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:30,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-12 20:23:30,530 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1790007940, now seen corresponding path program 85 times [2021-06-12 20:23:30,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:30,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28021741] [2021-06-12 20:23:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:30,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28021741] [2021-06-12 20:23:30,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28021741] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:30,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:30,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:30,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15394308] [2021-06-12 20:23:30,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:30,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:30,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:30,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:30,567 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:30,657 INFO L93 Difference]: Finished difference Result 406 states and 1135 transitions. [2021-06-12 20:23:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:30,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:30,658 INFO L225 Difference]: With dead ends: 406 [2021-06-12 20:23:30,658 INFO L226 Difference]: Without dead ends: 391 [2021-06-12 20:23:30,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-12 20:23:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 197. [2021-06-12 20:23:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-06-12 20:23:30,661 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-06-12 20:23:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:30,661 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-06-12 20:23:30,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-06-12 20:23:30,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:30,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:30,661 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:30,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-06-12 20:23:30,661 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:30,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1806944992, now seen corresponding path program 86 times [2021-06-12 20:23:30,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:30,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250683868] [2021-06-12 20:23:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:30,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:30,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250683868] [2021-06-12 20:23:30,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250683868] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:30,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:30,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:30,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919168647] [2021-06-12 20:23:30,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:30,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:30,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:30,699 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:30,787 INFO L93 Difference]: Finished difference Result 440 states and 1205 transitions. [2021-06-12 20:23:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:30,788 INFO L225 Difference]: With dead ends: 440 [2021-06-12 20:23:30,788 INFO L226 Difference]: Without dead ends: 425 [2021-06-12 20:23:30,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-12 20:23:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-06-12 20:23:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-06-12 20:23:30,791 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-06-12 20:23:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:30,792 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-06-12 20:23:30,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-06-12 20:23:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:30,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:30,792 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:30,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-06-12 20:23:30,792 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -666661156, now seen corresponding path program 87 times [2021-06-12 20:23:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:30,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090102637] [2021-06-12 20:23:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:30,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:30,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090102637] [2021-06-12 20:23:30,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090102637] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:30,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:30,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:30,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511980482] [2021-06-12 20:23:30,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:30,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:30,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:30,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:30,832 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:30,912 INFO L93 Difference]: Finished difference Result 419 states and 1167 transitions. [2021-06-12 20:23:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:30,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:30,913 INFO L225 Difference]: With dead ends: 419 [2021-06-12 20:23:30,913 INFO L226 Difference]: Without dead ends: 404 [2021-06-12 20:23:30,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-12 20:23:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 196. [2021-06-12 20:23:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-06-12 20:23:30,916 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-06-12 20:23:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:30,916 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-06-12 20:23:30,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-06-12 20:23:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:30,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:30,916 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:30,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-06-12 20:23:30,917 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:30,917 INFO L82 PathProgramCache]: Analyzing trace with hash 201773648, now seen corresponding path program 88 times [2021-06-12 20:23:30,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:30,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068658305] [2021-06-12 20:23:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:30,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:30,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068658305] [2021-06-12 20:23:30,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068658305] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:30,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:30,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:30,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526170308] [2021-06-12 20:23:30,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:30,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:30,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:30,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:30,947 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:31,030 INFO L93 Difference]: Finished difference Result 382 states and 1052 transitions. [2021-06-12 20:23:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:31,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:31,031 INFO L225 Difference]: With dead ends: 382 [2021-06-12 20:23:31,031 INFO L226 Difference]: Without dead ends: 367 [2021-06-12 20:23:31,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-12 20:23:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 198. [2021-06-12 20:23:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-06-12 20:23:31,034 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-06-12 20:23:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:31,034 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-06-12 20:23:31,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-06-12 20:23:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:31,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:31,034 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:31,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-06-12 20:23:31,035 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1159324884, now seen corresponding path program 89 times [2021-06-12 20:23:31,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:31,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008648782] [2021-06-12 20:23:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:31,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:31,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008648782] [2021-06-12 20:23:31,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008648782] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:31,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:31,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:31,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678747258] [2021-06-12 20:23:31,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:31,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:31,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:31,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:31,067 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:31,156 INFO L93 Difference]: Finished difference Result 383 states and 1063 transitions. [2021-06-12 20:23:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:31,157 INFO L225 Difference]: With dead ends: 383 [2021-06-12 20:23:31,157 INFO L226 Difference]: Without dead ends: 368 [2021-06-12 20:23:31,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-12 20:23:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 200. [2021-06-12 20:23:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-06-12 20:23:31,160 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-06-12 20:23:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:31,160 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-06-12 20:23:31,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-06-12 20:23:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:23:31,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:31,161 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:31,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-06-12 20:23:31,161 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:31,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1995358576, now seen corresponding path program 90 times [2021-06-12 20:23:31,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:31,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904121886] [2021-06-12 20:23:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:31,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904121886] [2021-06-12 20:23:31,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904121886] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:23:31,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:23:31,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:23:31,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709011236] [2021-06-12 20:23:31,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:31,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:31,202 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:31,294 INFO L93 Difference]: Finished difference Result 362 states and 1025 transitions. [2021-06-12 20:23:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:31,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 20:23:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:31,294 INFO L225 Difference]: With dead ends: 362 [2021-06-12 20:23:31,294 INFO L226 Difference]: Without dead ends: 347 [2021-06-12 20:23:31,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-12 20:23:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2021-06-12 20:23:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-06-12 20:23:31,297 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-06-12 20:23:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:31,297 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-06-12 20:23:31,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-06-12 20:23:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:31,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:31,298 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:31,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-06-12 20:23:31,298 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1106194689, now seen corresponding path program 1 times [2021-06-12 20:23:31,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:31,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351053107] [2021-06-12 20:23:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:31,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:31,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351053107] [2021-06-12 20:23:31,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351053107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:31,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890416698] [2021-06-12 20:23:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890416698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:31,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:31,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:23:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604093332] [2021-06-12 20:23:31,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:23:31,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:23:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:31,586 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2021-06-12 20:23:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:31,724 INFO L93 Difference]: Finished difference Result 363 states and 1031 transitions. [2021-06-12 20:23:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:31,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 18 [2021-06-12 20:23:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:31,732 INFO L225 Difference]: With dead ends: 363 [2021-06-12 20:23:31,732 INFO L226 Difference]: Without dead ends: 344 [2021-06-12 20:23:31,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:23:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-12 20:23:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-06-12 20:23:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-06-12 20:23:31,740 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 18 [2021-06-12 20:23:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:31,740 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-06-12 20:23:31,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2021-06-12 20:23:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-06-12 20:23:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:31,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:31,742 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:31,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 20:23:31,960 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1981219535, now seen corresponding path program 2 times [2021-06-12 20:23:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:31,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627689633] [2021-06-12 20:23:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:31,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627689633] [2021-06-12 20:23:31,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627689633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417791297] [2021-06-12 20:23:31,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:32,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:32,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:32,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:32,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:32,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417791297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:32,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:32,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 20:23:32,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044525913] [2021-06-12 20:23:32,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:23:32,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:32,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:23:32,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:23:32,081 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-06-12 20:23:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:32,123 INFO L93 Difference]: Finished difference Result 354 states and 1020 transitions. [2021-06-12 20:23:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:32,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 18 [2021-06-12 20:23:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:32,124 INFO L225 Difference]: With dead ends: 354 [2021-06-12 20:23:32,124 INFO L226 Difference]: Without dead ends: 319 [2021-06-12 20:23:32,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:23:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-12 20:23:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 216. [2021-06-12 20:23:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9813953488372094) internal successors, (641), 215 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 641 transitions. [2021-06-12 20:23:32,129 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 641 transitions. Word has length 18 [2021-06-12 20:23:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:32,129 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 641 transitions. [2021-06-12 20:23:32,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-06-12 20:23:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 641 transitions. [2021-06-12 20:23:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:32,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:32,129 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 20:23:32,345 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 948617417, now seen corresponding path program 1 times [2021-06-12 20:23:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624516498] [2021-06-12 20:23:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:32,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624516498] [2021-06-12 20:23:32,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624516498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150160034] [2021-06-12 20:23:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:32,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:32,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150160034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:32,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:32,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:23:32,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290911243] [2021-06-12 20:23:32,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:23:32,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:32,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:23:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:32,548 INFO L87 Difference]: Start difference. First operand 216 states and 641 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2021-06-12 20:23:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:32,754 INFO L93 Difference]: Finished difference Result 382 states and 1057 transitions. [2021-06-12 20:23:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:32,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 18 [2021-06-12 20:23:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:32,755 INFO L225 Difference]: With dead ends: 382 [2021-06-12 20:23:32,755 INFO L226 Difference]: Without dead ends: 342 [2021-06-12 20:23:32,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:23:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-12 20:23:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 221. [2021-06-12 20:23:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9727272727272727) internal successors, (654), 220 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-12 20:23:32,759 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 18 [2021-06-12 20:23:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:32,759 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-12 20:23:32,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2021-06-12 20:23:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-12 20:23:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:32,759 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:32,759 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:32,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 20:23:32,977 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:32,977 INFO L82 PathProgramCache]: Analyzing trace with hash 864569794, now seen corresponding path program 1 times [2021-06-12 20:23:32,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:32,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906243023] [2021-06-12 20:23:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:33,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:33,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906243023] [2021-06-12 20:23:33,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906243023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:33,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661000701] [2021-06-12 20:23:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:33,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:33,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661000701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:33,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:33,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 20:23:33,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329810281] [2021-06-12 20:23:33,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:23:33,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:23:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:23:33,128 INFO L87 Difference]: Start difference. First operand 221 states and 654 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:33,229 INFO L93 Difference]: Finished difference Result 389 states and 1088 transitions. [2021-06-12 20:23:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:33,230 INFO L225 Difference]: With dead ends: 389 [2021-06-12 20:23:33,230 INFO L226 Difference]: Without dead ends: 330 [2021-06-12 20:23:33,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-12 20:23:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 239. [2021-06-12 20:23:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.936974789915966) internal successors, (699), 238 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 699 transitions. [2021-06-12 20:23:33,235 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 699 transitions. Word has length 18 [2021-06-12 20:23:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:33,235 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 699 transitions. [2021-06-12 20:23:33,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 699 transitions. [2021-06-12 20:23:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:33,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:33,237 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:33,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:33,445 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:33,445 INFO L82 PathProgramCache]: Analyzing trace with hash 551699763, now seen corresponding path program 2 times [2021-06-12 20:23:33,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:33,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583156274] [2021-06-12 20:23:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:33,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:33,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583156274] [2021-06-12 20:23:33,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583156274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:33,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728958906] [2021-06-12 20:23:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:33,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:33,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:33,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728958906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:33,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:33,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-06-12 20:23:33,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718495451] [2021-06-12 20:23:33,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:23:33,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:23:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:33,610 INFO L87 Difference]: Start difference. First operand 239 states and 699 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:34,012 INFO L93 Difference]: Finished difference Result 711 states and 1983 transitions. [2021-06-12 20:23:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:23:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 18 [2021-06-12 20:23:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:34,013 INFO L225 Difference]: With dead ends: 711 [2021-06-12 20:23:34,013 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 20:23:34,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:23:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 20:23:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 271. [2021-06-12 20:23:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0555555555555554) internal successors, (825), 270 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 825 transitions. [2021-06-12 20:23:34,018 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 825 transitions. Word has length 18 [2021-06-12 20:23:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:34,019 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 825 transitions. [2021-06-12 20:23:34,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 825 transitions. [2021-06-12 20:23:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:34,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:34,019 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:34,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 20:23:34,229 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1320268317, now seen corresponding path program 3 times [2021-06-12 20:23:34,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:34,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464449778] [2021-06-12 20:23:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:34,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:34,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464449778] [2021-06-12 20:23:34,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464449778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:34,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972808223] [2021-06-12 20:23:34,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:34,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:23:34,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:34,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972808223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:34,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:34,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-12 20:23:34,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384539852] [2021-06-12 20:23:34,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:23:34,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:34,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:23:34,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:34,373 INFO L87 Difference]: Start difference. First operand 271 states and 825 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) [2021-06-12 20:23:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:34,766 INFO L93 Difference]: Finished difference Result 703 states and 1933 transitions. [2021-06-12 20:23:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:23:34,766 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 18 [2021-06-12 20:23:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:34,767 INFO L225 Difference]: With dead ends: 703 [2021-06-12 20:23:34,767 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 20:23:34,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:23:34,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 20:23:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 273. [2021-06-12 20:23:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0183823529411766) internal successors, (821), 272 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 821 transitions. [2021-06-12 20:23:34,772 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 821 transitions. Word has length 18 [2021-06-12 20:23:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:34,772 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 821 transitions. [2021-06-12 20:23:34,772 INFO L483 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) [2021-06-12 20:23:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 821 transitions. [2021-06-12 20:23:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:34,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:34,772 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:34,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:34,986 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:34,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:34,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1167846345, now seen corresponding path program 4 times [2021-06-12 20:23:34,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:34,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907582422] [2021-06-12 20:23:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:35,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:35,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907582422] [2021-06-12 20:23:35,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907582422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:35,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933952252] [2021-06-12 20:23:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:35,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:23:35,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:35,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:35,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933952252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:35,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:35,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 20:23:35,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142466678] [2021-06-12 20:23:35,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:23:35,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:35,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:23:35,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:23:35,149 INFO L87 Difference]: Start difference. First operand 273 states and 821 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-06-12 20:23:35,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:35,342 INFO L93 Difference]: Finished difference Result 491 states and 1371 transitions. [2021-06-12 20:23:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:35,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 18 [2021-06-12 20:23:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:35,344 INFO L225 Difference]: With dead ends: 491 [2021-06-12 20:23:35,344 INFO L226 Difference]: Without dead ends: 451 [2021-06-12 20:23:35,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:23:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-12 20:23:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 276. [2021-06-12 20:23:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0036363636363634) internal successors, (826), 275 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 826 transitions. [2021-06-12 20:23:35,348 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 826 transitions. Word has length 18 [2021-06-12 20:23:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:35,348 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 826 transitions. [2021-06-12 20:23:35,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-06-12 20:23:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 826 transitions. [2021-06-12 20:23:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:35,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:35,348 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:35,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 20:23:35,549 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1139445085, now seen corresponding path program 5 times [2021-06-12 20:23:35,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:35,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520476264] [2021-06-12 20:23:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:35,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:35,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520476264] [2021-06-12 20:23:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520476264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:35,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192473209] [2021-06-12 20:23:35,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:35,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:35,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192473209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:35,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:35,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 20:23:35,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850951002] [2021-06-12 20:23:35,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:23:35,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:35,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:23:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:23:35,744 INFO L87 Difference]: Start difference. First operand 276 states and 826 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-06-12 20:23:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:35,915 INFO L93 Difference]: Finished difference Result 462 states and 1278 transitions. [2021-06-12 20:23:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 18 [2021-06-12 20:23:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:35,916 INFO L225 Difference]: With dead ends: 462 [2021-06-12 20:23:35,916 INFO L226 Difference]: Without dead ends: 431 [2021-06-12 20:23:35,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:23:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-12 20:23:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 279. [2021-06-12 20:23:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.9892086330935252) internal successors, (831), 278 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 831 transitions. [2021-06-12 20:23:35,920 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 831 transitions. Word has length 18 [2021-06-12 20:23:35,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:35,920 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 831 transitions. [2021-06-12 20:23:35,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-06-12 20:23:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 831 transitions. [2021-06-12 20:23:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:35,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:35,920 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:36,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 20:23:36,139 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -732522995, now seen corresponding path program 6 times [2021-06-12 20:23:36,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:36,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750066955] [2021-06-12 20:23:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:36,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750066955] [2021-06-12 20:23:36,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750066955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52666044] [2021-06-12 20:23:36,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:36,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:23:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:36,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52666044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:36,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:36,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-12 20:23:36,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840022378] [2021-06-12 20:23:36,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:23:36,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:36,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:23:36,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:36,285 INFO L87 Difference]: Start difference. First operand 279 states and 831 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) [2021-06-12 20:23:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:36,736 INFO L93 Difference]: Finished difference Result 579 states and 1609 transitions. [2021-06-12 20:23:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:23:36,736 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 18 [2021-06-12 20:23:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:36,737 INFO L225 Difference]: With dead ends: 579 [2021-06-12 20:23:36,737 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 20:23:36,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:23:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 20:23:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 277. [2021-06-12 20:23:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0543478260869565) internal successors, (843), 276 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 843 transitions. [2021-06-12 20:23:36,741 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 843 transitions. Word has length 18 [2021-06-12 20:23:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:36,741 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 843 transitions. [2021-06-12 20:23:36,742 INFO L483 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) [2021-06-12 20:23:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 843 transitions. [2021-06-12 20:23:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:36,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:36,742 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:36,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:36,957 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:36,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1338392489, now seen corresponding path program 7 times [2021-06-12 20:23:36,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:36,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788673021] [2021-06-12 20:23:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:37,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788673021] [2021-06-12 20:23:37,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788673021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530045953] [2021-06-12 20:23:37,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:37,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530045953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:37,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:37,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:23:37,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907199636] [2021-06-12 20:23:37,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:23:37,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:23:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:37,113 INFO L87 Difference]: Start difference. First operand 277 states and 843 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:37,294 INFO L93 Difference]: Finished difference Result 557 states and 1551 transitions. [2021-06-12 20:23:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:37,295 INFO L225 Difference]: With dead ends: 557 [2021-06-12 20:23:37,295 INFO L226 Difference]: Without dead ends: 517 [2021-06-12 20:23:37,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:23:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-12 20:23:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 284. [2021-06-12 20:23:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.060070671378092) internal successors, (866), 283 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 866 transitions. [2021-06-12 20:23:37,300 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 866 transitions. Word has length 18 [2021-06-12 20:23:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:37,300 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 866 transitions. [2021-06-12 20:23:37,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 866 transitions. [2021-06-12 20:23:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:37,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:37,301 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:37,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 20:23:37,517 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1254344866, now seen corresponding path program 2 times [2021-06-12 20:23:37,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:37,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169652028] [2021-06-12 20:23:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:37,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169652028] [2021-06-12 20:23:37,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169652028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117695446] [2021-06-12 20:23:37,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:37,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:37,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:37,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117695446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:37,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:37,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 20:23:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871523887] [2021-06-12 20:23:37,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:23:37,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:37,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:23:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:23:37,629 INFO L87 Difference]: Start difference. First operand 284 states and 866 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:37,707 INFO L93 Difference]: Finished difference Result 566 states and 1626 transitions. [2021-06-12 20:23:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:37,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:37,708 INFO L225 Difference]: With dead ends: 566 [2021-06-12 20:23:37,708 INFO L226 Difference]: Without dead ends: 505 [2021-06-12 20:23:37,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-12 20:23:37,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-06-12 20:23:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.120401337792642) internal successors, (933), 299 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 933 transitions. [2021-06-12 20:23:37,712 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 933 transitions. Word has length 18 [2021-06-12 20:23:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:37,712 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 933 transitions. [2021-06-12 20:23:37,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 933 transitions. [2021-06-12 20:23:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:37,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:37,713 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:37,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-12 20:23:37,929 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2042464585, now seen corresponding path program 8 times [2021-06-12 20:23:37,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:37,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355718777] [2021-06-12 20:23:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:37,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:37,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355718777] [2021-06-12 20:23:37,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355718777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:37,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65007119] [2021-06-12 20:23:37,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:37,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:37,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:38,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65007119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:38,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:38,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-12 20:23:38,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521796167] [2021-06-12 20:23:38,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:38,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:38,035 INFO L87 Difference]: Start difference. First operand 300 states and 933 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:38,110 INFO L93 Difference]: Finished difference Result 439 states and 1262 transitions. [2021-06-12 20:23:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:38,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:38,112 INFO L225 Difference]: With dead ends: 439 [2021-06-12 20:23:38,112 INFO L226 Difference]: Without dead ends: 381 [2021-06-12 20:23:38,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-12 20:23:38,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 296. [2021-06-12 20:23:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.0406779661016947) internal successors, (897), 295 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 897 transitions. [2021-06-12 20:23:38,115 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 897 transitions. Word has length 18 [2021-06-12 20:23:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:38,115 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 897 transitions. [2021-06-12 20:23:38,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 897 transitions. [2021-06-12 20:23:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:38,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:38,116 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:38,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:38,316 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1866597709, now seen corresponding path program 3 times [2021-06-12 20:23:38,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:38,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659954678] [2021-06-12 20:23:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:38,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:38,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659954678] [2021-06-12 20:23:38,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659954678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:38,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506998572] [2021-06-12 20:23:38,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:38,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:23:38,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:38,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:38,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:38,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506998572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:38,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:38,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-12 20:23:38,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761497697] [2021-06-12 20:23:38,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:23:38,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:23:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:38,458 INFO L87 Difference]: Start difference. First operand 296 states and 897 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-06-12 20:23:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:38,757 INFO L93 Difference]: Finished difference Result 627 states and 1772 transitions. [2021-06-12 20:23:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:23:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 18 [2021-06-12 20:23:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:38,759 INFO L225 Difference]: With dead ends: 627 [2021-06-12 20:23:38,759 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 20:23:38,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 20:23:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 326. [2021-06-12 20:23:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.076923076923077) internal successors, (1000), 325 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1000 transitions. [2021-06-12 20:23:38,763 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1000 transitions. Word has length 18 [2021-06-12 20:23:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:38,763 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1000 transitions. [2021-06-12 20:23:38,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-06-12 20:23:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1000 transitions. [2021-06-12 20:23:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:38,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:38,764 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:38,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 20:23:38,964 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:38,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1213009967, now seen corresponding path program 4 times [2021-06-12 20:23:38,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:38,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286485795] [2021-06-12 20:23:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:39,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:39,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286485795] [2021-06-12 20:23:39,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286485795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:39,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812602508] [2021-06-12 20:23:39,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:39,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:23:39,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:39,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:39,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812602508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:39,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:39,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:23:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032829845] [2021-06-12 20:23:39,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:23:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:23:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:39,118 INFO L87 Difference]: Start difference. First operand 326 states and 1000 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-06-12 20:23:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:39,265 INFO L93 Difference]: Finished difference Result 453 states and 1320 transitions. [2021-06-12 20:23:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:39,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 18 [2021-06-12 20:23:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:39,266 INFO L225 Difference]: With dead ends: 453 [2021-06-12 20:23:39,266 INFO L226 Difference]: Without dead ends: 419 [2021-06-12 20:23:39,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:23:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-12 20:23:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 326. [2021-06-12 20:23:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0707692307692307) internal successors, (998), 325 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 998 transitions. [2021-06-12 20:23:39,270 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 998 transitions. Word has length 18 [2021-06-12 20:23:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:39,270 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 998 transitions. [2021-06-12 20:23:39,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-06-12 20:23:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 998 transitions. [2021-06-12 20:23:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:39,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:39,271 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:39,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:39,481 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1861527460, now seen corresponding path program 3 times [2021-06-12 20:23:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:39,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632739258] [2021-06-12 20:23:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:39,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:39,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632739258] [2021-06-12 20:23:39,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632739258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:39,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717493464] [2021-06-12 20:23:39,515 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:39,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:23:39,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:39,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717493464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:39,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:39,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-12 20:23:39,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401543678] [2021-06-12 20:23:39,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:23:39,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:23:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:39,642 INFO L87 Difference]: Start difference. First operand 326 states and 998 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2021-06-12 20:23:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:39,766 INFO L93 Difference]: Finished difference Result 528 states and 1512 transitions. [2021-06-12 20:23:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:23:39,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 18 [2021-06-12 20:23:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:39,767 INFO L225 Difference]: With dead ends: 528 [2021-06-12 20:23:39,767 INFO L226 Difference]: Without dead ends: 440 [2021-06-12 20:23:39,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:23:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-12 20:23:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 320. [2021-06-12 20:23:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.0564263322884013) internal successors, (975), 319 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 975 transitions. [2021-06-12 20:23:39,771 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 975 transitions. Word has length 18 [2021-06-12 20:23:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:39,771 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 975 transitions. [2021-06-12 20:23:39,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2021-06-12 20:23:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 975 transitions. [2021-06-12 20:23:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:39,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:39,772 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:39,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:39,985 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1726676173, now seen corresponding path program 5 times [2021-06-12 20:23:39,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:39,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417800013] [2021-06-12 20:23:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:40,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:40,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417800013] [2021-06-12 20:23:40,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417800013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:40,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000686442] [2021-06-12 20:23:40,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:40,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:40,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:40,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:40,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:40,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000686442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:40,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:40,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 20:23:40,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782930822] [2021-06-12 20:23:40,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:23:40,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:40,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:23:40,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:23:40,104 INFO L87 Difference]: Start difference. First operand 320 states and 975 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:40,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:40,144 INFO L93 Difference]: Finished difference Result 455 states and 1343 transitions. [2021-06-12 20:23:40,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:40,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:40,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:40,145 INFO L225 Difference]: With dead ends: 455 [2021-06-12 20:23:40,145 INFO L226 Difference]: Without dead ends: 405 [2021-06-12 20:23:40,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-12 20:23:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 307. [2021-06-12 20:23:40,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0326797385620914) internal successors, (928), 306 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) [2021-06-12 20:23:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 928 transitions. [2021-06-12 20:23:40,149 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 928 transitions. Word has length 18 [2021-06-12 20:23:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:40,149 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 928 transitions. [2021-06-12 20:23:40,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 928 transitions. [2021-06-12 20:23:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:40,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:40,149 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:40,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:40,350 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash -253324305, now seen corresponding path program 9 times [2021-06-12 20:23:40,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:40,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977592478] [2021-06-12 20:23:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:40,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977592478] [2021-06-12 20:23:40,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977592478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899345331] [2021-06-12 20:23:40,390 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 [2021-06-12 20:23:40,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:23:40,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:40,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:40,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:40,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899345331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:40,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:40,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-12 20:23:40,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457762993] [2021-06-12 20:23:40,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:23:40,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:40,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:23:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:40,472 INFO L87 Difference]: Start difference. First operand 307 states and 928 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) [2021-06-12 20:23:40,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:40,773 INFO L93 Difference]: Finished difference Result 718 states and 2053 transitions. [2021-06-12 20:23:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:23:40,773 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 18 [2021-06-12 20:23:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:40,774 INFO L225 Difference]: With dead ends: 718 [2021-06-12 20:23:40,774 INFO L226 Difference]: Without dead ends: 592 [2021-06-12 20:23:40,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-12 20:23:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-06-12 20:23:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0226537216828477) internal successors, (934), 309 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 934 transitions. [2021-06-12 20:23:40,778 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 934 transitions. Word has length 18 [2021-06-12 20:23:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:40,778 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 934 transitions. [2021-06-12 20:23:40,778 INFO L483 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) [2021-06-12 20:23:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 934 transitions. [2021-06-12 20:23:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:40,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:40,779 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:40,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:40,979 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:40,979 INFO L82 PathProgramCache]: Analyzing trace with hash -603750765, now seen corresponding path program 10 times [2021-06-12 20:23:40,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:40,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518781986] [2021-06-12 20:23:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:41,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:41,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518781986] [2021-06-12 20:23:41,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518781986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:41,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338273069] [2021-06-12 20:23:41,037 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 [2021-06-12 20:23:41,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:23:41,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:41,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:41,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338273069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:41,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:41,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 20:23:41,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531995268] [2021-06-12 20:23:41,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:23:41,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:23:41,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:23:41,139 INFO L87 Difference]: Start difference. First operand 310 states and 934 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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) [2021-06-12 20:23:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:41,324 INFO L93 Difference]: Finished difference Result 549 states and 1571 transitions. [2021-06-12 20:23:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:41,325 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 18 [2021-06-12 20:23:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:41,325 INFO L225 Difference]: With dead ends: 549 [2021-06-12 20:23:41,325 INFO L226 Difference]: Without dead ends: 512 [2021-06-12 20:23:41,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:23:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-12 20:23:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 310. [2021-06-12 20:23:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0194174757281553) internal successors, (933), 309 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 933 transitions. [2021-06-12 20:23:41,329 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 933 transitions. Word has length 18 [2021-06-12 20:23:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:41,330 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 933 transitions. [2021-06-12 20:23:41,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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) [2021-06-12 20:23:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 933 transitions. [2021-06-12 20:23:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:41,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:41,330 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:41,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-12 20:23:41,545 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:41,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1496627073, now seen corresponding path program 11 times [2021-06-12 20:23:41,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:41,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84720570] [2021-06-12 20:23:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:41,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84720570] [2021-06-12 20:23:41,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84720570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594217638] [2021-06-12 20:23:41,583 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) [2021-06-12 20:23:41,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:41,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:41,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:41,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594217638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:41,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:41,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:23:41,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239324350] [2021-06-12 20:23:41,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:23:41,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:41,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:23:41,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:41,693 INFO L87 Difference]: Start difference. First operand 310 states and 933 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-06-12 20:23:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:41,836 INFO L93 Difference]: Finished difference Result 552 states and 1552 transitions. [2021-06-12 20:23:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 18 [2021-06-12 20:23:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:41,837 INFO L225 Difference]: With dead ends: 552 [2021-06-12 20:23:41,837 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 20:23:41,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:23:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 20:23:41,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 313. [2021-06-12 20:23:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0288461538461537) internal successors, (945), 312 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 945 transitions. [2021-06-12 20:23:41,841 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 945 transitions. Word has length 18 [2021-06-12 20:23:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:41,841 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 945 transitions. [2021-06-12 20:23:41,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-06-12 20:23:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 945 transitions. [2021-06-12 20:23:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:41,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:41,841 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:42,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:42,057 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1579704863, now seen corresponding path program 12 times [2021-06-12 20:23:42,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:42,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460657516] [2021-06-12 20:23:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:42,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460657516] [2021-06-12 20:23:42,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460657516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677827092] [2021-06-12 20:23:42,078 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 [2021-06-12 20:23:42,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:23:42,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:42,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:42,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:42,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677827092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:42,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:42,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 20:23:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103113465] [2021-06-12 20:23:42,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:23:42,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:42,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:23:42,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:23:42,151 INFO L87 Difference]: Start difference. First operand 313 states and 945 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:42,194 INFO L93 Difference]: Finished difference Result 451 states and 1311 transitions. [2021-06-12 20:23:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:42,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:42,194 INFO L225 Difference]: With dead ends: 451 [2021-06-12 20:23:42,194 INFO L226 Difference]: Without dead ends: 402 [2021-06-12 20:23:42,195 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:23:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-12 20:23:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 275. [2021-06-12 20:23:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.9708029197080292) internal successors, (814), 274 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 814 transitions. [2021-06-12 20:23:42,198 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 814 transitions. Word has length 18 [2021-06-12 20:23:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:42,198 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 814 transitions. [2021-06-12 20:23:42,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 814 transitions. [2021-06-12 20:23:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:42,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:42,198 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:42,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-12 20:23:42,399 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1646468570, now seen corresponding path program 4 times [2021-06-12 20:23:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:42,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417036209] [2021-06-12 20:23:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:42,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:42,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417036209] [2021-06-12 20:23:42,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417036209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:42,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857709256] [2021-06-12 20:23:42,429 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:42,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:23:42,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857709256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:42,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:42,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 20:23:42,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684732358] [2021-06-12 20:23:42,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:23:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:23:42,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:23:42,526 INFO L87 Difference]: Start difference. First operand 275 states and 814 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:42,602 INFO L93 Difference]: Finished difference Result 382 states and 1100 transitions. [2021-06-12 20:23:42,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:42,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:42,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:42,603 INFO L225 Difference]: With dead ends: 382 [2021-06-12 20:23:42,603 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 20:23:42,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 20:23:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 285. [2021-06-12 20:23:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.943661971830986) internal successors, (836), 284 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 836 transitions. [2021-06-12 20:23:42,606 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 836 transitions. Word has length 18 [2021-06-12 20:23:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:42,606 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 836 transitions. [2021-06-12 20:23:42,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 836 transitions. [2021-06-12 20:23:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:42,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:42,607 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:42,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:42,807 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1039285976, now seen corresponding path program 5 times [2021-06-12 20:23:42,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:42,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146977438] [2021-06-12 20:23:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:42,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:42,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146977438] [2021-06-12 20:23:42,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146977438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:42,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941146504] [2021-06-12 20:23:42,835 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:42,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:42,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:42,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:42,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941146504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:42,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:42,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 20:23:42,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060748696] [2021-06-12 20:23:42,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:23:42,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:42,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:23:42,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:23:42,910 INFO L87 Difference]: Start difference. First operand 285 states and 836 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:42,958 INFO L93 Difference]: Finished difference Result 392 states and 1114 transitions. [2021-06-12 20:23:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:42,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:42,959 INFO L225 Difference]: With dead ends: 392 [2021-06-12 20:23:42,959 INFO L226 Difference]: Without dead ends: 337 [2021-06-12 20:23:42,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-12 20:23:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 274. [2021-06-12 20:23:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.93040293040293) internal successors, (800), 273 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 800 transitions. [2021-06-12 20:23:42,962 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 800 transitions. Word has length 18 [2021-06-12 20:23:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:42,962 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 800 transitions. [2021-06-12 20:23:42,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 800 transitions. [2021-06-12 20:23:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:42,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:42,963 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:43,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:43,169 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1633409787, now seen corresponding path program 6 times [2021-06-12 20:23:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:43,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534702321] [2021-06-12 20:23:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:43,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:43,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534702321] [2021-06-12 20:23:43,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534702321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:43,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033715157] [2021-06-12 20:23:43,215 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:43,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:23:43,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:43,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:43,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:43,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033715157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:43,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:43,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-12 20:23:43,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294136089] [2021-06-12 20:23:43,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:23:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:23:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:43,313 INFO L87 Difference]: Start difference. First operand 274 states and 800 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-06-12 20:23:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:43,688 INFO L93 Difference]: Finished difference Result 519 states and 1396 transitions. [2021-06-12 20:23:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:23:43,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 18 [2021-06-12 20:23:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:43,689 INFO L225 Difference]: With dead ends: 519 [2021-06-12 20:23:43,689 INFO L226 Difference]: Without dead ends: 431 [2021-06-12 20:23:43,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:23:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-12 20:23:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 279. [2021-06-12 20:23:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.91726618705036) internal successors, (811), 278 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 811 transitions. [2021-06-12 20:23:43,693 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 811 transitions. Word has length 18 [2021-06-12 20:23:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:43,693 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 811 transitions. [2021-06-12 20:23:43,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-06-12 20:23:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 811 transitions. [2021-06-12 20:23:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:43,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:43,693 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:43,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 20:23:43,894 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash -675858551, now seen corresponding path program 7 times [2021-06-12 20:23:43,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:43,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640909301] [2021-06-12 20:23:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:43,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:43,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640909301] [2021-06-12 20:23:43,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640909301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:43,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003684705] [2021-06-12 20:23:43,958 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:44,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003684705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:44,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:44,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:23:44,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230546348] [2021-06-12 20:23:44,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:23:44,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:44,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:23:44,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:23:44,074 INFO L87 Difference]: Start difference. First operand 279 states and 811 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-06-12 20:23:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:44,261 INFO L93 Difference]: Finished difference Result 371 states and 1004 transitions. [2021-06-12 20:23:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:23:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 18 [2021-06-12 20:23:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:44,262 INFO L225 Difference]: With dead ends: 371 [2021-06-12 20:23:44,262 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 20:23:44,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:23:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 20:23:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 285. [2021-06-12 20:23:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9014084507042255) internal successors, (824), 284 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 824 transitions. [2021-06-12 20:23:44,265 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 824 transitions. Word has length 18 [2021-06-12 20:23:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:44,265 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 824 transitions. [2021-06-12 20:23:44,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-06-12 20:23:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 824 transitions. [2021-06-12 20:23:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:44,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:44,266 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:44,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:44,466 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1891218171, now seen corresponding path program 8 times [2021-06-12 20:23:44,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:44,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60766667] [2021-06-12 20:23:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:44,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:44,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60766667] [2021-06-12 20:23:44,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60766667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:44,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430218828] [2021-06-12 20:23:44,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:44,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:44,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:44,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:44,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:44,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430218828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:44,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:44,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-12 20:23:44,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832345560] [2021-06-12 20:23:44,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:23:44,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:23:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:23:44,609 INFO L87 Difference]: Start difference. First operand 285 states and 824 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-06-12 20:23:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:44,924 INFO L93 Difference]: Finished difference Result 545 states and 1462 transitions. [2021-06-12 20:23:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:23:44,924 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 18 [2021-06-12 20:23:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:44,925 INFO L225 Difference]: With dead ends: 545 [2021-06-12 20:23:44,925 INFO L226 Difference]: Without dead ends: 433 [2021-06-12 20:23:44,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:23:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-12 20:23:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 264. [2021-06-12 20:23:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9277566539923954) internal successors, (770), 263 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 770 transitions. [2021-06-12 20:23:44,928 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 770 transitions. Word has length 18 [2021-06-12 20:23:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:44,928 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 770 transitions. [2021-06-12 20:23:44,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-06-12 20:23:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 770 transitions. [2021-06-12 20:23:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:44,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:44,929 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:45,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 20:23:45,129 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:45,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1770591994, now seen corresponding path program 6 times [2021-06-12 20:23:45,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:45,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174173453] [2021-06-12 20:23:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:45,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:45,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174173453] [2021-06-12 20:23:45,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174173453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:45,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23269574] [2021-06-12 20:23:45,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:45,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:23:45,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:45,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:23:45,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:45,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23269574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:45,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:45,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-12 20:23:45,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715103582] [2021-06-12 20:23:45,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:23:45,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:23:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:45,273 INFO L87 Difference]: Start difference. First operand 264 states and 770 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:45,382 INFO L93 Difference]: Finished difference Result 379 states and 1054 transitions. [2021-06-12 20:23:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:23:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:45,382 INFO L225 Difference]: With dead ends: 379 [2021-06-12 20:23:45,382 INFO L226 Difference]: Without dead ends: 285 [2021-06-12 20:23:45,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:23:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-12 20:23:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 208. [2021-06-12 20:23:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9082125603864735) internal successors, (602), 207 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 602 transitions. [2021-06-12 20:23:45,385 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 602 transitions. Word has length 18 [2021-06-12 20:23:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:45,385 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 602 transitions. [2021-06-12 20:23:45,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 602 transitions. [2021-06-12 20:23:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:23:45,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:45,385 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:45,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-12 20:23:45,586 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:45,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1782534729, now seen corresponding path program 9 times [2021-06-12 20:23:45,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:45,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695055967] [2021-06-12 20:23:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:45,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695055967] [2021-06-12 20:23:45,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695055967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482433474] [2021-06-12 20:23:45,618 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:45,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:23:45,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:45,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:23:45,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:45,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482433474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:45,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:45,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 20:23:45,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102692694] [2021-06-12 20:23:45,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:23:45,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:23:45,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:23:45,702 INFO L87 Difference]: Start difference. First operand 208 states and 602 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:45,787 INFO L93 Difference]: Finished difference Result 262 states and 743 transitions. [2021-06-12 20:23:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:23:45,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:23:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:45,788 INFO L225 Difference]: With dead ends: 262 [2021-06-12 20:23:45,788 INFO L226 Difference]: Without dead ends: 215 [2021-06-12 20:23:45,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:23:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-12 20:23:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 189. [2021-06-12 20:23:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-12 20:23:45,790 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 18 [2021-06-12 20:23:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:45,790 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-12 20:23:45,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-12 20:23:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:23:45,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:45,791 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:46,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 20:23:46,005 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash 440404552, now seen corresponding path program 1 times [2021-06-12 20:23:46,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:46,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559593139] [2021-06-12 20:23:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:46,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:46,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559593139] [2021-06-12 20:23:46,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559593139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:46,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810905421] [2021-06-12 20:23:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:23:46,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:47,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:47,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:23:47,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:47,569 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 122 [2021-06-12 20:23:47,570 INFO L628 ElimStorePlain]: treesize reduction 256, result has 63.3 percent of original size [2021-06-12 20:23:47,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:47,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:47,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:47,734 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 20:23:47,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:47,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:47,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:47,900 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-12 20:23:47,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:47,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:47,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:47,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,067 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 20:23:48,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:48,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:23:48,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:48,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,252 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 20:23:48,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:48,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:23:48,260 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:23:48,267 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,524 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-06-12 20:23:48,524 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.2 percent of original size [2021-06-12 20:23:48,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:23:48,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:48,553 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,676 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:23:48,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:48,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:48,684 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:48,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:23:48,689 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:48,804 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:23:48,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:48,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:23:48,820 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:705, output treesize:295 [2021-06-12 20:23:49,020 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 92 [2021-06-12 20:23:49,238 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-06-12 20:23:49,598 INFO L446 ElimStorePlain]: Different costs {0=[array_6, v_prenex_23], 1=[array_0, v_prenex_22]} [2021-06-12 20:23:49,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:23:49,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:49,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:23:49,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:49,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:23:49,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:49,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:23:49,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:49,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:23:49,620 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:49,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:23:49,625 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:49,755 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-12 20:23:49,755 INFO L628 ElimStorePlain]: treesize reduction 256, result has 33.3 percent of original size [2021-06-12 20:23:49,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:23:49,760 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:49,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:49,815 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:23:49,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-06-12 20:23:49,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:23:49,817 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:630, output treesize:105 [2021-06-12 20:23:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:49,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810905421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:49,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:49,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:23:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827724116] [2021-06-12 20:23:49,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:23:49,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:49,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:23:49,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:23:49,973 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:50,224 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2021-06-12 20:23:50,468 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2021-06-12 20:23:50,954 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 156 [2021-06-12 20:23:51,593 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 170 [2021-06-12 20:23:52,310 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 181 [2021-06-12 20:23:52,974 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 184 [2021-06-12 20:23:53,686 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 188 [2021-06-12 20:23:54,325 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 183 [2021-06-12 20:23:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:54,357 INFO L93 Difference]: Finished difference Result 442 states and 1213 transitions. [2021-06-12 20:23:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:23:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:23:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:54,358 INFO L225 Difference]: With dead ends: 442 [2021-06-12 20:23:54,358 INFO L226 Difference]: Without dead ends: 380 [2021-06-12 20:23:54,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4984.0ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:23:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-12 20:23:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 209. [2021-06-12 20:23:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.894230769230769) internal successors, (602), 208 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 602 transitions. [2021-06-12 20:23:54,361 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 602 transitions. Word has length 20 [2021-06-12 20:23:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:54,361 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 602 transitions. [2021-06-12 20:23:54,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 602 transitions. [2021-06-12 20:23:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:23:54,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:54,362 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:54,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:54,565 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash 43486898, now seen corresponding path program 2 times [2021-06-12 20:23:54,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:54,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702264483] [2021-06-12 20:23:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:54,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:54,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702264483] [2021-06-12 20:23:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702264483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:54,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811521088] [2021-06-12 20:23:54,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:54,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:54,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:23:54,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:55,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:55,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:55,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:23:55,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:55,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:23:55,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:55,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:55,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:23:55,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:55,956 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 126 [2021-06-12 20:23:55,957 INFO L628 ElimStorePlain]: treesize reduction 182, result has 71.4 percent of original size [2021-06-12 20:23:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:55,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:23:55,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:55,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:23:55,971 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:56,131 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-12 20:23:56,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:56,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:56,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:56,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:23:56,148 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:56,301 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 20:23:56,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:56,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:56,309 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:56,455 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 20:23:56,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:56,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:56,462 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:56,606 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-12 20:23:56,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:56,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:56,761 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 20:23:56,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:23:56,768 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:56,908 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 20:23:56,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:56,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:23:56,915 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:56,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:23:56,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:57,057 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:23:57,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:57,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:23:57,066 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:753, output treesize:343 [2021-06-12 20:23:57,273 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2021-06-12 20:23:57,784 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_53, v_prenex_51, v_prenex_47, array_6, v_prenex_45, v_prenex_55, v_prenex_49], 1=[v_prenex_50, array_0, v_prenex_54, v_prenex_52, v_prenex_46, v_prenex_44, v_prenex_48]} [2021-06-12 20:23:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:23:57,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:57,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:23:57,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:57,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:23:57,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:57,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:23:57,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:57,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:23:57,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:57,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:23:57,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:58,318 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 101 [2021-06-12 20:23:58,318 INFO L628 ElimStorePlain]: treesize reduction 1676, result has 13.6 percent of original size [2021-06-12 20:23:58,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:23:58,324 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:58,426 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:23:58,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:58,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:23:58,432 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:58,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:58,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:23:58,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:58,638 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:23:58,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:58,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:23:58,645 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:58,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:58,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:23:58,747 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:58,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:58,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:23:58,847 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:58,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:58,945 INFO L518 ElimStorePlain]: Eliminatee v_prenex_50 vanished before elimination [2021-06-12 20:23:58,945 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:23:58,945 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-06-12 20:23:58,945 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-06-12 20:23:58,945 INFO L518 ElimStorePlain]: Eliminatee v_prenex_46 vanished before elimination [2021-06-12 20:23:58,946 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-12 20:23:58,946 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-06-12 20:23:58,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:23:58,949 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2085, output treesize:175 [2021-06-12 20:23:59,109 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:23:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:59,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811521088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:59,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:59,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:23:59,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725611721] [2021-06-12 20:23:59,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:23:59,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:23:59,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:23:59,288 INFO L87 Difference]: Start difference. First operand 209 states and 602 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:59,559 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-06-12 20:23:59,810 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-12 20:24:00,290 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 167 [2021-06-12 20:24:00,537 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-12 20:24:01,044 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 174 [2021-06-12 20:24:01,298 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 107 [2021-06-12 20:24:02,070 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 176 [2021-06-12 20:24:02,347 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-12 20:24:03,127 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 178 [2021-06-12 20:24:03,670 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 170 [2021-06-12 20:24:04,487 WARN L205 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 183 [2021-06-12 20:24:04,745 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 107 [2021-06-12 20:24:05,587 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 185 [2021-06-12 20:24:06,196 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 177 [2021-06-12 20:24:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:06,263 INFO L93 Difference]: Finished difference Result 598 states and 1609 transitions. [2021-06-12 20:24:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:24:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:24:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:06,264 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:24:06,265 INFO L226 Difference]: Without dead ends: 526 [2021-06-12 20:24:06,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 7407.8ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:24:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-12 20:24:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 244. [2021-06-12 20:24:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.9012345679012346) internal successors, (705), 243 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 705 transitions. [2021-06-12 20:24:06,268 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 705 transitions. Word has length 20 [2021-06-12 20:24:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:06,268 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 705 transitions. [2021-06-12 20:24:06,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 705 transitions. [2021-06-12 20:24:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:24:06,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:06,269 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:06,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-12 20:24:06,469 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:06,469 INFO L82 PathProgramCache]: Analyzing trace with hash 123064008, now seen corresponding path program 3 times [2021-06-12 20:24:06,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:06,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013388321] [2021-06-12 20:24:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:06,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013388321] [2021-06-12 20:24:06,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013388321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242227504] [2021-06-12 20:24:06,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:06,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:24:06,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:06,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:24:06,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:07,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:07,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:07,619 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2021-06-12 20:24:07,619 INFO L628 ElimStorePlain]: treesize reduction 183, result has 67.9 percent of original size [2021-06-12 20:24:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:07,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:07,781 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 20:24:07,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:07,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:07,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:07,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:07,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:07,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:07,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:07,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:07,937 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:24:07,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:07,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:07,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:07,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:08,085 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:24:08,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:08,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:08,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:08,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:08,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:08,098 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:08,332 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2021-06-12 20:24:08,332 INFO L628 ElimStorePlain]: treesize reduction 34, result has 89.8 percent of original size [2021-06-12 20:24:08,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:08,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:08,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:24:08,338 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:08,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:08,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:08,344 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:08,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:08,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:24:08,449 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:577, output treesize:243 [2021-06-12 20:24:08,637 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-12 20:24:08,951 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 84 [2021-06-12 20:24:09,196 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_83, v_prenex_81, v_prenex_85, array_6, v_prenex_79, v_prenex_77], 1=[v_prenex_82, v_prenex_80, v_prenex_76, array_3, v_prenex_84, v_prenex_78]} [2021-06-12 20:24:09,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:09,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:09,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:09,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:09,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:09,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:09,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,547 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 84 [2021-06-12 20:24:09,547 INFO L628 ElimStorePlain]: treesize reduction 1172, result has 14.1 percent of original size [2021-06-12 20:24:09,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:24:09,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:09,624 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:09,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:09,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:09,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:09,755 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:09,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:09,818 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:09,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:09,874 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-06-12 20:24:09,874 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-06-12 20:24:09,874 INFO L518 ElimStorePlain]: Eliminatee v_prenex_76 vanished before elimination [2021-06-12 20:24:09,874 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:24:09,874 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-06-12 20:24:09,874 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-06-12 20:24:09,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:24:09,876 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1537, output treesize:107 [2021-06-12 20:24:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:10,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242227504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:10,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:10,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:24:10,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200399112] [2021-06-12 20:24:10,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:24:10,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:24:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:24:10,011 INFO L87 Difference]: Start difference. First operand 244 states and 705 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:10,274 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-12 20:24:10,519 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-12 20:24:10,805 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2021-06-12 20:24:11,284 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 155 [2021-06-12 20:24:11,902 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 174 [2021-06-12 20:24:12,127 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2021-06-12 20:24:12,317 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2021-06-12 20:24:12,616 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2021-06-12 20:24:12,855 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2021-06-12 20:24:13,186 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 109 [2021-06-12 20:24:13,448 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2021-06-12 20:24:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:13,491 INFO L93 Difference]: Finished difference Result 466 states and 1295 transitions. [2021-06-12 20:24:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:24:13,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:24:13,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:13,492 INFO L225 Difference]: With dead ends: 466 [2021-06-12 20:24:13,492 INFO L226 Difference]: Without dead ends: 403 [2021-06-12 20:24:13,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3847.0ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:24:13,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-12 20:24:13,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 259. [2021-06-12 20:24:13,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.887596899224806) internal successors, (745), 258 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 745 transitions. [2021-06-12 20:24:13,495 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 745 transitions. Word has length 20 [2021-06-12 20:24:13,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:13,495 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 745 transitions. [2021-06-12 20:24:13,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 745 transitions. [2021-06-12 20:24:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:24:13,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:13,496 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:13,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:13,696 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:13,697 INFO L82 PathProgramCache]: Analyzing trace with hash 602348684, now seen corresponding path program 4 times [2021-06-12 20:24:13,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:13,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055237376] [2021-06-12 20:24:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:13,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:13,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055237376] [2021-06-12 20:24:13,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055237376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:13,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523369086] [2021-06-12 20:24:13,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:13,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:24:13,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:13,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:24:13,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:14,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:14,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:14,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:14,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:14,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:14,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:14,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:14,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:14,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:14,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:14,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:14,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:14,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,191 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-12 20:24:15,191 INFO L628 ElimStorePlain]: treesize reduction 602, result has 44.9 percent of original size [2021-06-12 20:24:15,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:15,198 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:15,203 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:15,210 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,413 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:24:15,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:15,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:15,419 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:15,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:15,430 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,773 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-12 20:24:15,774 INFO L628 ElimStorePlain]: treesize reduction 27, result has 93.9 percent of original size [2021-06-12 20:24:15,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:15,780 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:24:15,785 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:15,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:15,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:15,791 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:16,074 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 20:24:16,075 INFO L628 ElimStorePlain]: treesize reduction 34, result has 90.6 percent of original size [2021-06-12 20:24:16,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:24:16,082 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:306 [2021-06-12 20:24:16,318 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-06-12 20:24:16,515 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_98, array_6, v_prenex_100, v_prenex_102, v_prenex_104], 1=[array_3, v_prenex_97, v_prenex_101, v_prenex_99, v_prenex_103]} [2021-06-12 20:24:16,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:16,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:16,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:16,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:16,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:16,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:16,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:16,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:16,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:16,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:17,006 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 90 [2021-06-12 20:24:17,006 INFO L628 ElimStorePlain]: treesize reduction 1183, result has 22.1 percent of original size [2021-06-12 20:24:17,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:24:17,013 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:17,143 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 20:24:17,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:17,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:17,149 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:17,279 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 20:24:17,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:17,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:17,284 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:17,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:24:17,289 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:17,526 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-12 20:24:17,526 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.3 percent of original size [2021-06-12 20:24:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:17,531 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:17,645 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 20:24:17,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:17,646 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:24:17,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-06-12 20:24:17,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_101 vanished before elimination [2021-06-12 20:24:17,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_99 vanished before elimination [2021-06-12 20:24:17,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-12 20:24:17,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-12 20:24:17,653 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:1681, output treesize:238 [2021-06-12 20:24:17,823 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-06-12 20:24:17,982 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:24:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:18,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523369086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:18,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:18,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:24:18,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086765154] [2021-06-12 20:24:18,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:24:18,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:18,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:24:18,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:24:18,067 INFO L87 Difference]: Start difference. First operand 259 states and 745 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:18,328 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-12 20:24:18,569 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2021-06-12 20:24:18,958 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2021-06-12 20:24:19,455 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 151 [2021-06-12 20:24:19,838 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 113 [2021-06-12 20:24:20,265 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 120 [2021-06-12 20:24:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:20,310 INFO L93 Difference]: Finished difference Result 448 states and 1254 transitions. [2021-06-12 20:24:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:24:20,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:24:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:20,311 INFO L225 Difference]: With dead ends: 448 [2021-06-12 20:24:20,311 INFO L226 Difference]: Without dead ends: 433 [2021-06-12 20:24:20,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2920.1ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:24:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-12 20:24:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 259. [2021-06-12 20:24:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.887596899224806) internal successors, (745), 258 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 745 transitions. [2021-06-12 20:24:20,314 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 745 transitions. Word has length 20 [2021-06-12 20:24:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:20,314 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 745 transitions. [2021-06-12 20:24:20,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 745 transitions. [2021-06-12 20:24:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:24:20,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:20,314 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:20,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:20,515 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:20,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1096371704, now seen corresponding path program 5 times [2021-06-12 20:24:20,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:20,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062595178] [2021-06-12 20:24:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:20,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:20,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062595178] [2021-06-12 20:24:20,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062595178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:20,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225029919] [2021-06-12 20:24:20,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:20,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:24:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:24:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:20,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:24:20,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:20,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:20,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:20,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:20,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:20,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:20,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:20,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:24:20,986 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:20,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:20,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:20,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:20,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:20,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:20,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:21,003 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:24:21,007 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:21,011 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:21,015 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:24:21,019 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:24:21,023 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:21,027 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:21,030 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:21,035 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:21,039 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:21,176 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 20:24:21,176 INFO L628 ElimStorePlain]: treesize reduction 99, result has 63.7 percent of original size [2021-06-12 20:24:21,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:24:21,178 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:799, output treesize:174 [2021-06-12 20:24:21,523 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:24:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:21,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225029919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:21,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:21,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:24:21,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960876679] [2021-06-12 20:24:21,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:24:21,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:21,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:24:21,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:24:21,674 INFO L87 Difference]: Start difference. First operand 259 states and 745 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:22,062 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-06-12 20:24:22,283 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-12 20:24:22,718 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2021-06-12 20:24:22,950 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-12 20:24:23,205 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-06-12 20:24:23,356 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-12 20:24:23,623 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-12 20:24:23,884 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2021-06-12 20:24:24,102 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-12 20:24:24,259 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-12 20:24:24,657 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-12 20:24:24,899 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-12 20:24:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:24,933 INFO L93 Difference]: Finished difference Result 503 states and 1384 transitions. [2021-06-12 20:24:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:24:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:24:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:24,934 INFO L225 Difference]: With dead ends: 503 [2021-06-12 20:24:24,934 INFO L226 Difference]: Without dead ends: 444 [2021-06-12 20:24:24,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3559.0ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:24:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-12 20:24:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 265. [2021-06-12 20:24:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.9166666666666665) internal successors, (770), 264 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 770 transitions. [2021-06-12 20:24:24,937 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 770 transitions. Word has length 20 [2021-06-12 20:24:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:24,937 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 770 transitions. [2021-06-12 20:24:24,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 770 transitions. [2021-06-12 20:24:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:24:24,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:24,938 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:25,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-06-12 20:24:25,138 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1137578486, now seen corresponding path program 6 times [2021-06-12 20:24:25,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:25,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121790214] [2021-06-12 20:24:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:25,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:25,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121790214] [2021-06-12 20:24:25,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121790214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:25,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968981145] [2021-06-12 20:24:25,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:25,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:24:25,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:24:25,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:25,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:25,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:26,323 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 132 [2021-06-12 20:24:26,324 INFO L628 ElimStorePlain]: treesize reduction 238, result has 68.1 percent of original size [2021-06-12 20:24:26,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:24:26,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:26,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:26,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:26,527 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-12 20:24:26,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:26,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:26,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:26,541 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:26,722 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 20:24:26,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:26,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:24:26,731 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:26,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:26,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:24:26,738 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:27,040 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 112 [2021-06-12 20:24:27,040 INFO L628 ElimStorePlain]: treesize reduction 24, result has 94.2 percent of original size [2021-06-12 20:24:27,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:27,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:27,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:27,047 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:27,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:27,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:27,053 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:27,194 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 20:24:27,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:27,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:27,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:27,201 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:27,342 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-12 20:24:27,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:27,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:27,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:27,349 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:27,488 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:24:27,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:27,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:27,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:27,495 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:27,632 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:24:27,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:27,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:24:27,640 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:753, output treesize:342 [2021-06-12 20:24:27,854 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 101 [2021-06-12 20:24:28,384 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_130, v_prenex_132, array_6, v_prenex_134, v_prenex_136, v_prenex_126, v_prenex_128], 1=[v_prenex_129, array_0, v_prenex_131, v_prenex_133, v_prenex_135, v_prenex_125, v_prenex_127]} [2021-06-12 20:24:28,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:28,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:28,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:28,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:28,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:28,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:28,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:28,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:28,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:28,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:28,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:28,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:28,893 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 104 [2021-06-12 20:24:28,894 INFO L628 ElimStorePlain]: treesize reduction 1706, result has 13.8 percent of original size [2021-06-12 20:24:28,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:28,900 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:29,004 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 20:24:29,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:29,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:29,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:29,112 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:24:29,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:29,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:29,118 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:29,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:29,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:24:29,223 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:29,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:29,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:24:29,324 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:29,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:29,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:29,423 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:29,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:29,519 INFO L518 ElimStorePlain]: Eliminatee v_prenex_129 vanished before elimination [2021-06-12 20:24:29,519 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:24:29,519 INFO L518 ElimStorePlain]: Eliminatee v_prenex_131 vanished before elimination [2021-06-12 20:24:29,519 INFO L518 ElimStorePlain]: Eliminatee v_prenex_133 vanished before elimination [2021-06-12 20:24:29,519 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-12 20:24:29,519 INFO L518 ElimStorePlain]: Eliminatee v_prenex_125 vanished before elimination [2021-06-12 20:24:29,519 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-06-12 20:24:29,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:24:29,522 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2085, output treesize:175 [2021-06-12 20:24:29,681 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:24:29,836 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:24:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:29,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968981145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:29,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:29,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:24:29,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707282276] [2021-06-12 20:24:29,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:24:29,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:24:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:24:29,930 INFO L87 Difference]: Start difference. First operand 265 states and 770 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:30,195 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-12 20:24:30,444 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2021-06-12 20:24:30,763 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 94 [2021-06-12 20:24:31,262 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 173 [2021-06-12 20:24:31,724 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 116 [2021-06-12 20:24:31,958 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103 [2021-06-12 20:24:32,447 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 119 [2021-06-12 20:24:32,754 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 108 [2021-06-12 20:24:33,254 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 123 [2021-06-12 20:24:33,468 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-06-12 20:24:34,003 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 126 [2021-06-12 20:24:34,231 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2021-06-12 20:24:34,571 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 115 [2021-06-12 20:24:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:34,636 INFO L93 Difference]: Finished difference Result 552 states and 1522 transitions. [2021-06-12 20:24:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:24:34,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:24:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:34,637 INFO L225 Difference]: With dead ends: 552 [2021-06-12 20:24:34,637 INFO L226 Difference]: Without dead ends: 480 [2021-06-12 20:24:34,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5195.8ms TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:24:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-12 20:24:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 265. [2021-06-12 20:24:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.9166666666666665) internal successors, (770), 264 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 770 transitions. [2021-06-12 20:24:34,641 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 770 transitions. Word has length 20 [2021-06-12 20:24:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:34,641 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 770 transitions. [2021-06-12 20:24:34,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 770 transitions. [2021-06-12 20:24:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:24:34,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:34,641 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:34,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:34,857 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:34,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2043738866, now seen corresponding path program 7 times [2021-06-12 20:24:34,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:34,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637972222] [2021-06-12 20:24:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:35,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:35,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637972222] [2021-06-12 20:24:35,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637972222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:35,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821451121] [2021-06-12 20:24:35,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:35,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:24:35,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:35,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:35,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:35,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:35,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:35,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:35,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:35,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:35,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:35,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:35,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:35,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:35,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:35,675 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,021 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-12 20:24:36,022 INFO L628 ElimStorePlain]: treesize reduction 512, result has 43.6 percent of original size [2021-06-12 20:24:36,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:36,029 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:36,034 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:36,039 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,287 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-06-12 20:24:36,287 INFO L628 ElimStorePlain]: treesize reduction 28, result has 92.4 percent of original size [2021-06-12 20:24:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:36,293 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:36,298 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:36,303 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,421 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 20:24:36,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:36,427 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:36,431 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:36,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:36,435 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:36,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:36,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:24:36,537 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1009, output treesize:229 [2021-06-12 20:24:36,703 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-06-12 20:24:37,172 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_150, v_prenex_152, array_6], 1=[array_3, v_prenex_151, v_prenex_149]} [2021-06-12 20:24:37,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:37,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:37,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:37,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:37,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:37,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:37,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:37,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:37,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:37,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:37,208 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:37,402 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2021-06-12 20:24:37,402 INFO L628 ElimStorePlain]: treesize reduction 675, result has 20.0 percent of original size [2021-06-12 20:24:37,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:37,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:37,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:37,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:37,471 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:37,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:37,530 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:24:37,530 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-06-12 20:24:37,530 INFO L518 ElimStorePlain]: Eliminatee v_prenex_149 vanished before elimination [2021-06-12 20:24:37,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 20:24:37,532 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:978, output treesize:131 [2021-06-12 20:24:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:37,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821451121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:37,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:37,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:24:37,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677193701] [2021-06-12 20:24:37,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:24:37,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:24:37,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:24:37,732 INFO L87 Difference]: Start difference. First operand 265 states and 770 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:37,975 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2021-06-12 20:24:38,223 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 20:24:38,622 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 139 [2021-06-12 20:24:39,174 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 151 [2021-06-12 20:24:39,728 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 161 [2021-06-12 20:24:40,311 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 169 [2021-06-12 20:24:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:40,357 INFO L93 Difference]: Finished difference Result 498 states and 1407 transitions. [2021-06-12 20:24:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:24:40,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:24:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:40,358 INFO L225 Difference]: With dead ends: 498 [2021-06-12 20:24:40,358 INFO L226 Difference]: Without dead ends: 483 [2021-06-12 20:24:40,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3080.5ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:24:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-12 20:24:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 280. [2021-06-12 20:24:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.913978494623656) internal successors, (813), 279 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 813 transitions. [2021-06-12 20:24:40,362 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 813 transitions. Word has length 20 [2021-06-12 20:24:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:40,362 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 813 transitions. [2021-06-12 20:24:40,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 813 transitions. [2021-06-12 20:24:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:24:40,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:40,362 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:40,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-12 20:24:40,563 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1723983538, now seen corresponding path program 8 times [2021-06-12 20:24:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:40,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256971778] [2021-06-12 20:24:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:40,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:40,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256971778] [2021-06-12 20:24:40,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256971778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:40,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359388226] [2021-06-12 20:24:40,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:40,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:24:40,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:24:40,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:41,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:41,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:41,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:41,513 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 99 [2021-06-12 20:24:41,513 INFO L628 ElimStorePlain]: treesize reduction 173, result has 67.6 percent of original size [2021-06-12 20:24:41,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:41,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:41,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:41,650 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:24:41,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:41,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:41,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:41,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:41,783 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 20:24:41,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:41,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:41,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:41,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:24:41,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:41,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:41,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:24:41,795 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:41,914 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:24:41,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:41,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:41,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:41,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:41,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:41,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:41,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:42,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:42,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:42,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:42,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:42,021 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:42,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:42,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:42,026 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:42,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:42,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:24:42,116 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:541, output treesize:219 [2021-06-12 20:24:42,282 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-12 20:24:42,616 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_171, v_prenex_173, v_prenex_165, array_6, v_prenex_167, v_prenex_169], 1=[v_prenex_170, v_prenex_172, array_3, v_prenex_164, v_prenex_166, v_prenex_168]} [2021-06-12 20:24:42,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:42,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:42,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:42,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:42,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:42,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:42,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:42,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:42,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:42,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:42,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:42,662 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:43,021 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 85 [2021-06-12 20:24:43,022 INFO L628 ElimStorePlain]: treesize reduction 1337, result has 14.6 percent of original size [2021-06-12 20:24:43,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:24:43,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:43,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:43,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:24:43,117 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:43,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:43,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:43,203 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:43,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:43,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:43,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:43,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:43,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:43,375 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:43,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:43,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_170 vanished before elimination [2021-06-12 20:24:43,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_172 vanished before elimination [2021-06-12 20:24:43,452 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:24:43,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_164 vanished before elimination [2021-06-12 20:24:43,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-06-12 20:24:43,453 INFO L518 ElimStorePlain]: Eliminatee v_prenex_168 vanished before elimination [2021-06-12 20:24:43,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:24:43,458 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1719, output treesize:148 [2021-06-12 20:24:43,594 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-12 20:24:43,767 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-12 20:24:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:43,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359388226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:43,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:43,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:24:43,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906664359] [2021-06-12 20:24:43,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:24:43,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:24:43,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:24:43,837 INFO L87 Difference]: Start difference. First operand 280 states and 813 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:44,284 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-12 20:24:44,650 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 123 [2021-06-12 20:24:45,255 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 128 [2021-06-12 20:24:45,867 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 135 [2021-06-12 20:24:46,608 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 152 [2021-06-12 20:24:47,222 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 141 [2021-06-12 20:24:47,993 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 158 [2021-06-12 20:24:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:48,078 INFO L93 Difference]: Finished difference Result 570 states and 1579 transitions. [2021-06-12 20:24:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:24:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:24:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:48,080 INFO L225 Difference]: With dead ends: 570 [2021-06-12 20:24:48,080 INFO L226 Difference]: Without dead ends: 528 [2021-06-12 20:24:48,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4643.5ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:24:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-12 20:24:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 286. [2021-06-12 20:24:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.9298245614035086) internal successors, (835), 285 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 835 transitions. [2021-06-12 20:24:48,083 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 835 transitions. Word has length 20 [2021-06-12 20:24:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:48,084 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 835 transitions. [2021-06-12 20:24:48,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 835 transitions. [2021-06-12 20:24:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:24:48,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:48,084 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:48,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1209,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:48,285 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:48,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1163299806, now seen corresponding path program 9 times [2021-06-12 20:24:48,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:48,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091449316] [2021-06-12 20:24:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:48,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:48,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091449316] [2021-06-12 20:24:48,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091449316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:48,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301955589] [2021-06-12 20:24:48,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:48,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:24:48,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:24:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:49,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:49,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:49,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:49,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:49,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:49,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:49,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,402 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-06-12 20:24:49,402 INFO L628 ElimStorePlain]: treesize reduction 426, result has 47.3 percent of original size [2021-06-12 20:24:49,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:24:49,408 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:24:49,414 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:24:49,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,657 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-12 20:24:49,658 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:24:49,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:49,663 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:49,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:49,669 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:49,673 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:49,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:49,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:24:49,773 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:919, output treesize:234 [2021-06-12 20:24:50,181 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 82 [2021-06-12 20:24:50,408 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_191, v_prenex_193, v_prenex_195, v_prenex_197, array_6, v_prenex_199], 1=[v_prenex_190, v_prenex_192, array_3, v_prenex_194, v_prenex_196, v_prenex_198]} [2021-06-12 20:24:50,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:50,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:50,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:50,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:50,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:50,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:24:50,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,732 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 81 [2021-06-12 20:24:50,733 INFO L628 ElimStorePlain]: treesize reduction 1080, result has 14.1 percent of original size [2021-06-12 20:24:50,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:50,738 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:50,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:50,815 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:50,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:50,882 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:50,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:50,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:50,947 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:51,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:51,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:51,010 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:51,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:51,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_190 vanished before elimination [2021-06-12 20:24:51,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_192 vanished before elimination [2021-06-12 20:24:51,066 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:24:51,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-06-12 20:24:51,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-06-12 20:24:51,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_198 vanished before elimination [2021-06-12 20:24:51,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:24:51,068 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1489, output treesize:107 [2021-06-12 20:24:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301955589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:51,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:51,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:24:51,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705196255] [2021-06-12 20:24:51,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:24:51,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:51,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:24:51,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:24:51,215 INFO L87 Difference]: Start difference. First operand 286 states and 835 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:51,695 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-12 20:24:51,919 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-06-12 20:24:52,368 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 133 [2021-06-12 20:24:52,964 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 136 [2021-06-12 20:24:53,236 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-12 20:24:53,499 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2021-06-12 20:24:53,724 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-12 20:24:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:53,744 INFO L93 Difference]: Finished difference Result 469 states and 1324 transitions. [2021-06-12 20:24:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:24:53,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:24:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:53,745 INFO L225 Difference]: With dead ends: 469 [2021-06-12 20:24:53,745 INFO L226 Difference]: Without dead ends: 421 [2021-06-12 20:24:53,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2870.0ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:24:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-12 20:24:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 292. [2021-06-12 20:24:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.924398625429553) internal successors, (851), 291 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 851 transitions. [2021-06-12 20:24:53,749 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 851 transitions. Word has length 20 [2021-06-12 20:24:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:53,749 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 851 transitions. [2021-06-12 20:24:53,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 851 transitions. [2021-06-12 20:24:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:24:53,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:53,749 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:53,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-12 20:24:53,951 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:53,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1642584482, now seen corresponding path program 10 times [2021-06-12 20:24:53,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:53,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636236636] [2021-06-12 20:24:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:54,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:54,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636236636] [2021-06-12 20:24:54,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636236636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:54,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382095501] [2021-06-12 20:24:54,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:54,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:24:54,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:54,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:24:54,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:54,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:54,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:54,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:54,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:55,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:55,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:24:55,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:55,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:55,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,508 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-06-12 20:24:55,508 INFO L628 ElimStorePlain]: treesize reduction 593, result has 45.6 percent of original size [2021-06-12 20:24:55,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:55,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:55,521 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:55,527 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,897 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-12 20:24:55,898 INFO L628 ElimStorePlain]: treesize reduction 27, result has 94.2 percent of original size [2021-06-12 20:24:55,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:55,908 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:24:55,913 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:55,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:55,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:24:55,919 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:56,224 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-12 20:24:56,224 INFO L628 ElimStorePlain]: treesize reduction 36, result has 91.0 percent of original size [2021-06-12 20:24:56,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:56,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:56,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:56,231 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:56,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:56,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:24:56,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:24:56,236 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:56,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:56,241 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:56,387 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 20:24:56,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:56,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:24:56,394 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:321 [2021-06-12 20:24:56,639 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-12 20:24:56,796 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_218, v_prenex_220, array_6, v_prenex_233, v_prenex_222, v_prenex_212, v_prenex_224, v_prenex_214, v_prenex_226, v_prenex_216], 1=[v_prenex_217, v_prenex_219, array_3, v_prenex_221, v_prenex_211, v_prenex_223, v_prenex_213, v_prenex_225, v_prenex_215, v_prenex_227]} [2021-06-12 20:24:56,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:24:56,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:57,176 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 88 [2021-06-12 20:24:57,177 INFO L628 ElimStorePlain]: treesize reduction 888, result has 24.7 percent of original size [2021-06-12 20:24:57,177 INFO L518 ElimStorePlain]: Eliminatee v_prenex_220 vanished before elimination [2021-06-12 20:24:57,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:57,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:57,293 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 20:24:57,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:57,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:24:57,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:57,404 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:24:57,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:57,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:24:57,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:57,513 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 20:24:57,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:57,513 INFO L518 ElimStorePlain]: Eliminatee v_prenex_212 vanished before elimination [2021-06-12 20:24:57,513 INFO L518 ElimStorePlain]: Eliminatee v_prenex_224 vanished before elimination [2021-06-12 20:24:57,513 INFO L518 ElimStorePlain]: Eliminatee v_prenex_214 vanished before elimination [2021-06-12 20:24:57,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:24:57,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:24:57,618 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 20:24:57,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_216 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_217 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_219 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_211 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_223 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_213 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_225 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-06-12 20:24:57,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-12 20:24:57,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:24:57,622 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 30 variables, input treesize:1186, output treesize:216 [2021-06-12 20:24:57,785 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-12 20:24:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:57,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382095501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:57,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:57,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:24:57,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353245083] [2021-06-12 20:24:57,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:24:57,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:24:57,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:24:57,958 INFO L87 Difference]: Start difference. First operand 292 states and 851 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:58,229 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-06-12 20:24:58,512 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2021-06-12 20:24:58,889 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 93 [2021-06-12 20:24:59,392 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 153 [2021-06-12 20:24:59,787 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 115 [2021-06-12 20:25:00,214 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 122 [2021-06-12 20:25:00,541 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 103 [2021-06-12 20:25:00,871 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2021-06-12 20:25:01,217 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 107 [2021-06-12 20:25:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:01,262 INFO L93 Difference]: Finished difference Result 549 states and 1533 transitions. [2021-06-12 20:25:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:25:01,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:01,263 INFO L225 Difference]: With dead ends: 549 [2021-06-12 20:25:01,263 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 20:25:01,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3840.2ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:25:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 20:25:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 304. [2021-06-12 20:25:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.933993399339934) internal successors, (889), 303 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 889 transitions. [2021-06-12 20:25:01,267 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 889 transitions. Word has length 20 [2021-06-12 20:25:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:01,267 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 889 transitions. [2021-06-12 20:25:01,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 889 transitions. [2021-06-12 20:25:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:01,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:01,268 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:01,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:01,468 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash -56135906, now seen corresponding path program 11 times [2021-06-12 20:25:01,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:01,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390384497] [2021-06-12 20:25:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:01,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:01,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390384497] [2021-06-12 20:25:01,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390384497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:01,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078432089] [2021-06-12 20:25:01,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:01,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:25:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:25:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:25:01,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:01,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:25:01,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:01,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:01,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:01,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:01,902 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:25:01,906 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:01,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:25:01,920 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:01,938 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:25:01,942 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:25:01,947 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:01,951 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:01,956 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:01,960 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:01,980 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:25:01,986 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:25:01,990 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:01,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:01,998 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:02,130 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-12 20:25:02,131 INFO L628 ElimStorePlain]: treesize reduction 129, result has 57.6 percent of original size [2021-06-12 20:25:02,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:25:02,132 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:715, output treesize:175 [2021-06-12 20:25:02,483 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-12 20:25:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:02,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078432089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:02,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:02,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:25:02,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649983238] [2021-06-12 20:25:02,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:25:02,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:02,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:25:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:25:02,661 INFO L87 Difference]: Start difference. First operand 304 states and 889 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:02,857 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-06-12 20:25:03,062 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-12 20:25:03,238 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-12 20:25:03,667 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2021-06-12 20:25:03,872 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-12 20:25:04,211 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-06-12 20:25:04,407 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-12 20:25:04,789 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-06-12 20:25:05,160 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-12 20:25:05,457 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-06-12 20:25:05,676 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-12 20:25:06,084 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-06-12 20:25:06,422 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-12 20:25:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:06,455 INFO L93 Difference]: Finished difference Result 561 states and 1556 transitions. [2021-06-12 20:25:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:25:06,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:06,456 INFO L225 Difference]: With dead ends: 561 [2021-06-12 20:25:06,456 INFO L226 Difference]: Without dead ends: 502 [2021-06-12 20:25:06,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4073.2ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:25:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-12 20:25:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 310. [2021-06-12 20:25:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9482200647249193) internal successors, (911), 309 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 911 transitions. [2021-06-12 20:25:06,460 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 911 transitions. Word has length 20 [2021-06-12 20:25:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:06,460 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 911 transitions. [2021-06-12 20:25:06,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 911 transitions. [2021-06-12 20:25:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:06,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:06,461 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:06,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-12 20:25:06,663 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:06,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:06,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2117153012, now seen corresponding path program 12 times [2021-06-12 20:25:06,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:06,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826261521] [2021-06-12 20:25:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:06,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:06,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826261521] [2021-06-12 20:25:06,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826261521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:06,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508353486] [2021-06-12 20:25:06,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:06,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:25:06,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:25:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:25:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:07,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:07,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:07,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:07,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:07,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:07,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:07,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:07,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:07,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:07,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:07,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:07,938 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-06-12 20:25:07,939 INFO L628 ElimStorePlain]: treesize reduction 586, result has 43.8 percent of original size [2021-06-12 20:25:07,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:07,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:07,951 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:07,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:07,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:07,957 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:08,128 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 20:25:08,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:08,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:25:08,149 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:08,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:08,156 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:08,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:08,162 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:08,323 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 20:25:08,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:08,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:08,330 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:08,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:08,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:08,336 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:08,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:08,340 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:08,481 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 20:25:08,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:08,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:25:08,488 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:327 [2021-06-12 20:25:08,695 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 100 [2021-06-12 20:25:09,473 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_260, v_prenex_250, v_prenex_252, v_prenex_254, array_6, v_prenex_256, v_prenex_258], 1=[array_0, v_prenex_251, v_prenex_253, v_prenex_255, v_prenex_257, v_prenex_259, v_prenex_249]} [2021-06-12 20:25:09,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:09,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:09,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:09,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:09,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:09,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:09,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:25:09,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:09,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:09,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:09,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:09,534 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:10,023 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 105 [2021-06-12 20:25:10,023 INFO L628 ElimStorePlain]: treesize reduction 1590, result has 16.1 percent of original size [2021-06-12 20:25:10,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:10,029 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:10,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:10,035 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:10,136 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:25:10,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:10,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:10,143 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:10,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:10,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:25:10,249 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:10,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:10,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:10,351 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:10,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:10,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:10,452 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:10,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:10,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:10,551 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:10,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:10,647 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:25:10,648 INFO L518 ElimStorePlain]: Eliminatee v_prenex_251 vanished before elimination [2021-06-12 20:25:10,648 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-06-12 20:25:10,648 INFO L518 ElimStorePlain]: Eliminatee v_prenex_255 vanished before elimination [2021-06-12 20:25:10,648 INFO L518 ElimStorePlain]: Eliminatee v_prenex_257 vanished before elimination [2021-06-12 20:25:10,648 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-06-12 20:25:10,648 INFO L518 ElimStorePlain]: Eliminatee v_prenex_249 vanished before elimination [2021-06-12 20:25:10,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:25:10,651 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 21 variables, input treesize:2043, output treesize:175 [2021-06-12 20:25:10,811 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:25:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:10,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508353486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:10,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:10,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:25:10,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542217540] [2021-06-12 20:25:10,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:25:10,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:10,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:25:10,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:25:10,997 INFO L87 Difference]: Start difference. First operand 310 states and 911 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:11,271 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2021-06-12 20:25:11,565 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2021-06-12 20:25:11,951 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 96 [2021-06-12 20:25:12,490 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 169 [2021-06-12 20:25:12,849 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2021-06-12 20:25:13,119 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 108 [2021-06-12 20:25:13,502 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 125 [2021-06-12 20:25:13,832 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 109 [2021-06-12 20:25:14,219 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 129 [2021-06-12 20:25:14,449 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-12 20:25:14,876 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 132 [2021-06-12 20:25:15,131 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 107 [2021-06-12 20:25:15,491 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2021-06-12 20:25:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:15,555 INFO L93 Difference]: Finished difference Result 598 states and 1665 transitions. [2021-06-12 20:25:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:25:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:15,556 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:25:15,556 INFO L226 Difference]: Without dead ends: 526 [2021-06-12 20:25:15,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 5037.1ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:25:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-12 20:25:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 310. [2021-06-12 20:25:15,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9482200647249193) internal successors, (911), 309 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 911 transitions. [2021-06-12 20:25:15,560 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 911 transitions. Word has length 20 [2021-06-12 20:25:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:15,560 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 911 transitions. [2021-06-12 20:25:15,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 911 transitions. [2021-06-12 20:25:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:15,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:15,561 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:15,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1740 [2021-06-12 20:25:15,761 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:15,762 INFO L82 PathProgramCache]: Analyzing trace with hash -361470104, now seen corresponding path program 13 times [2021-06-12 20:25:15,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:15,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895693857] [2021-06-12 20:25:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:15,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:15,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895693857] [2021-06-12 20:25:15,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895693857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:15,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282056138] [2021-06-12 20:25:15,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:25:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:16,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:16,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:16,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,046 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 123 [2021-06-12 20:25:17,047 INFO L628 ElimStorePlain]: treesize reduction 225, result has 67.8 percent of original size [2021-06-12 20:25:17,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:17,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,230 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-12 20:25:17,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:17,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:17,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,407 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 20:25:17,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:17,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:17,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,582 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 20:25:17,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:17,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:17,590 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:17,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,757 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-12 20:25:17,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:17,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:17,764 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:17,770 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,930 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 20:25:17,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:17,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:17,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:25:17,938 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:17,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:17,943 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:18,077 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 20:25:18,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:18,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:18,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:18,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:25:18,084 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:18,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:18,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:18,089 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:18,211 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:25:18,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:18,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:25:18,220 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:705, output treesize:311 [2021-06-12 20:25:18,420 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 94 [2021-06-12 20:25:18,603 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2021-06-12 20:25:18,970 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_285, array_6], 1=[array_0, v_prenex_284]} [2021-06-12 20:25:18,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:18,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:18,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:18,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:18,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:18,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:18,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:18,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:18,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:18,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:18,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:18,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:19,114 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-12 20:25:19,115 INFO L628 ElimStorePlain]: treesize reduction 259, result has 34.3 percent of original size [2021-06-12 20:25:19,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:19,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:19,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:19,163 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:25:19,163 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-12 20:25:19,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:25:19,165 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:630, output treesize:105 [2021-06-12 20:25:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:19,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282056138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:19,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:19,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:25:19,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075476304] [2021-06-12 20:25:19,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:25:19,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:19,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:25:19,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:25:19,299 INFO L87 Difference]: Start difference. First operand 310 states and 911 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:19,804 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-06-12 20:25:20,178 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 134 [2021-06-12 20:25:20,642 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 148 [2021-06-12 20:25:21,157 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 151 [2021-06-12 20:25:21,681 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 164 [2021-06-12 20:25:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:21,744 INFO L93 Difference]: Finished difference Result 555 states and 1571 transitions. [2021-06-12 20:25:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:25:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:21,745 INFO L225 Difference]: With dead ends: 555 [2021-06-12 20:25:21,745 INFO L226 Difference]: Without dead ends: 515 [2021-06-12 20:25:21,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2936.5ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:25:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-12 20:25:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 322. [2021-06-12 20:25:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.94392523364486) internal successors, (945), 321 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 945 transitions. [2021-06-12 20:25:21,748 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 945 transitions. Word has length 20 [2021-06-12 20:25:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:21,749 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 945 transitions. [2021-06-12 20:25:21,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 945 transitions. [2021-06-12 20:25:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:21,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:21,749 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:21,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:21,950 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash -758387758, now seen corresponding path program 14 times [2021-06-12 20:25:21,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:21,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924392528] [2021-06-12 20:25:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:22,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:22,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924392528] [2021-06-12 20:25:22,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924392528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:22,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006176824] [2021-06-12 20:25:22,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:22,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:25:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:25:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:25:22,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:22,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:22,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:22,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:22,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:22,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:22,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:22,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:22,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:22,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:22,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:22,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:22,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:22,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:23,020 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-06-12 20:25:23,021 INFO L628 ElimStorePlain]: treesize reduction 456, result has 43.6 percent of original size [2021-06-12 20:25:23,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:23,026 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:23,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:23,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:23,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:25:23,037 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:23,289 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-12 20:25:23,289 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:25:23,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:23,295 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:23,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:25:23,301 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:23,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:23,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:23,305 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:23,514 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-12 20:25:23,514 INFO L628 ElimStorePlain]: treesize reduction 27, result has 90.1 percent of original size [2021-06-12 20:25:23,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:25:23,520 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:919, output treesize:233 [2021-06-12 20:25:24,089 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_296, v_prenex_298, array_6, v_prenex_300, v_prenex_302, v_prenex_304], 1=[array_0, v_prenex_295, v_prenex_297, v_prenex_299, v_prenex_301, v_prenex_303]} [2021-06-12 20:25:24,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:25:24,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:24,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:25:24,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:24,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:25:24,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:24,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:24,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:24,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:24,133 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:24,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:24,142 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:24,616 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 91 [2021-06-12 20:25:24,617 INFO L628 ElimStorePlain]: treesize reduction 1475, result has 18.8 percent of original size [2021-06-12 20:25:24,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:24,622 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:24,760 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:25:24,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:24,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:24,766 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:24,901 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:25:24,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:24,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:24,907 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:25,043 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 20:25:25,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:25,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:25:25,048 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:25,180 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 20:25:25,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:25,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:25:25,186 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:25,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:25,190 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:25,412 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-12 20:25:25,412 INFO L628 ElimStorePlain]: treesize reduction 31, result has 89.3 percent of original size [2021-06-12 20:25:25,412 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:25:25,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_295 vanished before elimination [2021-06-12 20:25:25,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-12 20:25:25,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_299 vanished before elimination [2021-06-12 20:25:25,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-12 20:25:25,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-12 20:25:25,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 20:25:25,415 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:2057, output treesize:222 [2021-06-12 20:25:25,675 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-12 20:25:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:25,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006176824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:25,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:25,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:25:25,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646280454] [2021-06-12 20:25:25,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:25:25,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:25,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:25:25,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:25:25,794 INFO L87 Difference]: Start difference. First operand 322 states and 945 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:26,220 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 20:25:26,588 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 116 [2021-06-12 20:25:27,128 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 122 [2021-06-12 20:25:27,290 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-12 20:25:27,778 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 136 [2021-06-12 20:25:27,961 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-12 20:25:28,517 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 144 [2021-06-12 20:25:28,718 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-12 20:25:29,315 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 149 [2021-06-12 20:25:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:29,351 INFO L93 Difference]: Finished difference Result 671 states and 1864 transitions. [2021-06-12 20:25:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:25:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:29,352 INFO L225 Difference]: With dead ends: 671 [2021-06-12 20:25:29,352 INFO L226 Difference]: Without dead ends: 614 [2021-06-12 20:25:29,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3990.6ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:25:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-12 20:25:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 322. [2021-06-12 20:25:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.94392523364486) internal successors, (945), 321 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 945 transitions. [2021-06-12 20:25:29,357 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 945 transitions. Word has length 20 [2021-06-12 20:25:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:29,357 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 945 transitions. [2021-06-12 20:25:29,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 945 transitions. [2021-06-12 20:25:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:29,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:29,357 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:29,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-06-12 20:25:29,573 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash -678810648, now seen corresponding path program 15 times [2021-06-12 20:25:29,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:29,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871174032] [2021-06-12 20:25:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:29,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:29,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871174032] [2021-06-12 20:25:29,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871174032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:29,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501677747] [2021-06-12 20:25:29,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:29,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:25:29,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:25:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:25:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:30,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:30,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:30,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:30,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:30,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:30,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:30,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:30,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:30,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:30,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:30,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:30,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,157 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-06-12 20:25:31,157 INFO L628 ElimStorePlain]: treesize reduction 546, result has 44.5 percent of original size [2021-06-12 20:25:31,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:31,164 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:31,169 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:31,175 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,461 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-12 20:25:31,461 INFO L628 ElimStorePlain]: treesize reduction 31, result has 92.0 percent of original size [2021-06-12 20:25:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:31,467 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:31,473 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:31,477 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,611 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 20:25:31,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:31,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:31,617 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:31,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:31,622 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:31,627 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:31,754 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-12 20:25:31,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:31,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:25:31,766 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1129, output treesize:285 [2021-06-12 20:25:31,991 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-12 20:25:32,245 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2021-06-12 20:25:32,403 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_330, array_6, v_prenex_332, v_prenex_322, v_prenex_337, v_prenex_326], 1=[v_prenex_329, array_3, v_prenex_331, v_prenex_321, v_prenex_333, v_prenex_325]} [2021-06-12 20:25:32,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:32,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:32,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:32,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:32,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:25:32,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:32,644 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 73 [2021-06-12 20:25:32,645 INFO L628 ElimStorePlain]: treesize reduction 426, result has 32.5 percent of original size [2021-06-12 20:25:32,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:32,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:32,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:32,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:32,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:32,806 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:32,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:32,876 INFO L518 ElimStorePlain]: Eliminatee v_prenex_337 vanished before elimination [2021-06-12 20:25:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:32,880 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:32,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:32,949 INFO L518 ElimStorePlain]: Eliminatee v_prenex_329 vanished before elimination [2021-06-12 20:25:32,949 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:25:32,949 INFO L518 ElimStorePlain]: Eliminatee v_prenex_331 vanished before elimination [2021-06-12 20:25:32,949 INFO L518 ElimStorePlain]: Eliminatee v_prenex_321 vanished before elimination [2021-06-12 20:25:32,949 INFO L518 ElimStorePlain]: Eliminatee v_prenex_333 vanished before elimination [2021-06-12 20:25:32,949 INFO L518 ElimStorePlain]: Eliminatee v_prenex_325 vanished before elimination [2021-06-12 20:25:32,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:25:32,951 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 18 variables, input treesize:729, output treesize:145 [2021-06-12 20:25:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:33,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501677747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:33,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:33,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:25:33,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561652955] [2021-06-12 20:25:33,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:25:33,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:33,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:25:33,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:25:33,139 INFO L87 Difference]: Start difference. First operand 322 states and 945 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:33,677 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 107 [2021-06-12 20:25:34,021 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 113 [2021-06-12 20:25:34,589 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-06-12 20:25:35,075 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 154 [2021-06-12 20:25:35,312 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-12 20:25:35,617 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2021-06-12 20:25:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:35,667 INFO L93 Difference]: Finished difference Result 524 states and 1510 transitions. [2021-06-12 20:25:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:25:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:35,668 INFO L225 Difference]: With dead ends: 524 [2021-06-12 20:25:35,668 INFO L226 Difference]: Without dead ends: 509 [2021-06-12 20:25:35,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3297.5ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:25:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-12 20:25:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 325. [2021-06-12 20:25:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.941358024691358) internal successors, (953), 324 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 953 transitions. [2021-06-12 20:25:35,672 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 953 transitions. Word has length 20 [2021-06-12 20:25:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:35,672 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 953 transitions. [2021-06-12 20:25:35,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 953 transitions. [2021-06-12 20:25:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:35,673 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:35,673 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:35,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:35,873 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash -199525972, now seen corresponding path program 16 times [2021-06-12 20:25:35,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:35,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984997317] [2021-06-12 20:25:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:36,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:36,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984997317] [2021-06-12 20:25:36,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984997317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:36,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126100420] [2021-06-12 20:25:36,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:36,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:25:36,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:25:36,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:25:36,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:36,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:36,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:36,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:36,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:36,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:36,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:36,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:36,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:36,976 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:36,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:36,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:36,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,473 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-12 20:25:37,473 INFO L628 ElimStorePlain]: treesize reduction 595, result has 45.6 percent of original size [2021-06-12 20:25:37,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:37,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:37,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:37,492 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,675 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:25:37,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:37,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:37,681 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:37,687 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:37,693 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,868 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 20:25:37,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:37,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:37,874 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:37,880 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:37,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:37,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:37,886 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:38,189 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 20:25:38,189 INFO L628 ElimStorePlain]: treesize reduction 34, result has 91.0 percent of original size [2021-06-12 20:25:38,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:25:38,196 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:321 [2021-06-12 20:25:38,441 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-12 20:25:38,599 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_361, v_prenex_372, v_prenex_363, v_prenex_353, array_6, v_prenex_365, v_prenex_355, v_prenex_367, v_prenex_357, v_prenex_359], 1=[array_3, v_prenex_360, v_prenex_362, v_prenex_352, v_prenex_364, v_prenex_354, v_prenex_366, v_prenex_356, v_prenex_368, v_prenex_358]} [2021-06-12 20:25:38,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:38,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:39,009 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 100 [2021-06-12 20:25:39,009 INFO L628 ElimStorePlain]: treesize reduction 850, result has 27.9 percent of original size [2021-06-12 20:25:39,010 INFO L518 ElimStorePlain]: Eliminatee v_prenex_372 vanished before elimination [2021-06-12 20:25:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:39,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:39,142 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:25:39,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:39,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:39,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:39,274 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:25:39,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:39,275 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:25:39,275 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-06-12 20:25:39,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:39,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:39,400 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:25:39,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:39,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:39,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:39,523 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:25:39,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:39,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:39,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:39,642 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 20:25:39,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_359 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_360 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_362 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_352 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_364 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_354 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_366 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_356 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_368 vanished before elimination [2021-06-12 20:25:39,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-06-12 20:25:39,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-12 20:25:39,647 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 30 variables, input treesize:1186, output treesize:239 [2021-06-12 20:25:39,817 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-06-12 20:25:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:39,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126100420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:39,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:39,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:25:39,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020912262] [2021-06-12 20:25:39,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:25:39,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:25:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:25:39,991 INFO L87 Difference]: Start difference. First operand 325 states and 953 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:40,463 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2021-06-12 20:25:40,781 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 109 [2021-06-12 20:25:41,282 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 158 [2021-06-12 20:25:41,601 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-12 20:25:41,938 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-12 20:25:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:41,981 INFO L93 Difference]: Finished difference Result 545 states and 1547 transitions. [2021-06-12 20:25:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:25:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:41,982 INFO L225 Difference]: With dead ends: 545 [2021-06-12 20:25:41,982 INFO L226 Difference]: Without dead ends: 530 [2021-06-12 20:25:41,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2620.8ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:25:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-12 20:25:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 325. [2021-06-12 20:25:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.941358024691358) internal successors, (953), 324 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 953 transitions. [2021-06-12 20:25:41,986 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 953 transitions. Word has length 20 [2021-06-12 20:25:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:41,986 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 953 transitions. [2021-06-12 20:25:41,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 953 transitions. [2021-06-12 20:25:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:41,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:41,986 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:42,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2575 [2021-06-12 20:25:42,187 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1898246360, now seen corresponding path program 17 times [2021-06-12 20:25:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:42,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872480426] [2021-06-12 20:25:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:42,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:42,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872480426] [2021-06-12 20:25:42,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872480426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:42,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097116633] [2021-06-12 20:25:42,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:42,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:25:42,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:25:42,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:25:42,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:42,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:25:42,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:25:42,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:42,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:42,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:25:42,591 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:42,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:42,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:42,603 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:25:42,607 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:42,611 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:25:42,615 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:42,619 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:42,622 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:42,626 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:25:42,630 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:42,634 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:25:42,638 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:25:42,642 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:42,762 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-12 20:25:42,762 INFO L628 ElimStorePlain]: treesize reduction 113, result has 60.8 percent of original size [2021-06-12 20:25:42,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:25:42,764 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:763, output treesize:175 [2021-06-12 20:25:43,116 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:25:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:43,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097116633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:43,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:43,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:25:43,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559693951] [2021-06-12 20:25:43,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:25:43,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:43,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:25:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:25:43,314 INFO L87 Difference]: Start difference. First operand 325 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:43,641 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-12 20:25:43,849 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-12 20:25:44,260 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-12 20:25:44,481 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-12 20:25:44,712 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-12 20:25:45,065 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-12 20:25:45,315 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-12 20:25:45,509 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-12 20:25:45,888 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-12 20:25:46,108 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-12 20:25:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:46,143 INFO L93 Difference]: Finished difference Result 615 states and 1714 transitions. [2021-06-12 20:25:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:25:46,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:46,144 INFO L225 Difference]: With dead ends: 615 [2021-06-12 20:25:46,145 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:25:46,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3118.3ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:25:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:25:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 328. [2021-06-12 20:25:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-12 20:25:46,149 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 20 [2021-06-12 20:25:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:46,149 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-12 20:25:46,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-12 20:25:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:46,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:46,149 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:46,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2735 [2021-06-12 20:25:46,350 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash 335703830, now seen corresponding path program 18 times [2021-06-12 20:25:46,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:46,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399856153] [2021-06-12 20:25:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:46,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:46,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399856153] [2021-06-12 20:25:46,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399856153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:46,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192677321] [2021-06-12 20:25:46,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:46,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:25:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:25:46,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:25:46,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:47,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:47,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:47,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:47,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:47,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:47,225 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:47,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,665 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2021-06-12 20:25:47,666 INFO L628 ElimStorePlain]: treesize reduction 624, result has 42.6 percent of original size [2021-06-12 20:25:47,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:25:47,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:47,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:47,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:47,683 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:47,998 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-12 20:25:47,999 INFO L628 ElimStorePlain]: treesize reduction 24, result has 94.2 percent of original size [2021-06-12 20:25:48,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:48,005 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:48,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:48,010 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:48,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:48,015 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:48,304 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-06-12 20:25:48,305 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:25:48,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:25:48,311 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:48,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:48,317 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:48,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:48,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:48,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:48,484 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 20:25:48,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:48,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:25:48,493 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:327 [2021-06-12 20:25:48,708 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 100 [2021-06-12 20:25:49,356 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_393, v_prenex_395, v_prenex_397, array_6, v_prenex_399, v_prenex_401, v_prenex_403], 1=[array_0, v_prenex_392, v_prenex_394, v_prenex_396, v_prenex_398, v_prenex_400, v_prenex_402]} [2021-06-12 20:25:49,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:49,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:49,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:49,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:49,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:49,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:49,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:25:49,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:49,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:49,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:49,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:49,421 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:49,909 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 105 [2021-06-12 20:25:49,910 INFO L628 ElimStorePlain]: treesize reduction 1557, result has 16.4 percent of original size [2021-06-12 20:25:49,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:49,916 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:50,037 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:25:50,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:50,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:25:50,044 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:50,169 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:25:50,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:50,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:25:50,175 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:50,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:50,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:50,384 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-12 20:25:50,384 INFO L628 ElimStorePlain]: treesize reduction 33, result has 88.0 percent of original size [2021-06-12 20:25:50,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:50,390 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:50,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:50,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:50,492 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:50,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:50,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:50,592 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:50,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:50,687 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:25:50,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_392 vanished before elimination [2021-06-12 20:25:50,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_394 vanished before elimination [2021-06-12 20:25:50,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_396 vanished before elimination [2021-06-12 20:25:50,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_398 vanished before elimination [2021-06-12 20:25:50,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-06-12 20:25:50,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_402 vanished before elimination [2021-06-12 20:25:50,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:25:50,690 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 21 variables, input treesize:2043, output treesize:175 [2021-06-12 20:25:50,856 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:25:51,013 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:25:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:51,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192677321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:51,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:51,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:25:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732273250] [2021-06-12 20:25:51,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:25:51,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:25:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:25:51,095 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:51,561 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 107 [2021-06-12 20:25:51,871 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 111 [2021-06-12 20:25:52,251 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 145 [2021-06-12 20:25:52,540 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 20:25:52,851 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-12 20:25:53,072 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-12 20:25:53,353 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-12 20:25:53,703 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2021-06-12 20:25:53,955 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-06-12 20:25:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:25:53,994 INFO L93 Difference]: Finished difference Result 607 states and 1698 transitions. [2021-06-12 20:25:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:25:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:25:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:25:53,995 INFO L225 Difference]: With dead ends: 607 [2021-06-12 20:25:53,995 INFO L226 Difference]: Without dead ends: 577 [2021-06-12 20:25:53,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3515.0ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:25:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-12 20:25:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 328. [2021-06-12 20:25:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-12 20:25:54,000 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 20 [2021-06-12 20:25:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:25:54,000 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-12 20:25:54,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-12 20:25:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:25:54,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:25:54,000 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:25:54,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2796 [2021-06-12 20:25:54,201 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:25:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:25:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1363016558, now seen corresponding path program 19 times [2021-06-12 20:25:54,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:25:54,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815908084] [2021-06-12 20:25:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:25:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:54,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:25:54,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815908084] [2021-06-12 20:25:54,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815908084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:54,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876746030] [2021-06-12 20:25:54,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:25:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:25:54,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:25:54,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:25:55,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:55,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:55,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:55,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:55,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:55,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:55,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:55,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:55,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:55,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:25:55,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:55,674 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 131 [2021-06-12 20:25:55,674 INFO L628 ElimStorePlain]: treesize reduction 216, result has 69.9 percent of original size [2021-06-12 20:25:55,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:55,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:55,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:55,885 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-12 20:25:55,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:55,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:55,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:55,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:56,094 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 20:25:56,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:56,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:56,298 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-12 20:25:56,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:56,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:25:56,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:56,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:56,312 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:56,500 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 20:25:56,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:56,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:56,507 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:56,694 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 20:25:56,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:56,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:25:56,702 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:56,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:56,707 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:56,862 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:25:56,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:56,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:25:56,869 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:56,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:25:56,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:25:56,874 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:57,027 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:25:57,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:57,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:25:57,035 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:801, output treesize:361 [2021-06-12 20:25:57,279 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 102 [2021-06-12 20:25:57,504 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_437, v_prenex_427, v_prenex_429, array_6, v_prenex_431, v_prenex_433, v_prenex_435], 1=[v_prenex_426, v_prenex_428, array_0, v_prenex_430, v_prenex_432, v_prenex_434, v_prenex_436]} [2021-06-12 20:25:57,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:25:57,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:57,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:57,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:57,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:57,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:57,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:57,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:57,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:57,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:57,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:25:57,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:58,019 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 105 [2021-06-12 20:25:58,019 INFO L628 ElimStorePlain]: treesize reduction 1482, result has 17.1 percent of original size [2021-06-12 20:25:58,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:58,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:58,148 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:25:58,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:58,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:58,154 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:58,276 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:25:58,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:58,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:25:58,282 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:58,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:58,287 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:58,494 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2021-06-12 20:25:58,495 INFO L628 ElimStorePlain]: treesize reduction 33, result has 88.0 percent of original size [2021-06-12 20:25:58,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:25:58,501 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:58,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:58,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:58,604 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:58,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:58,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:25:58,708 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:25:58,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:25:58,800 INFO L518 ElimStorePlain]: Eliminatee v_prenex_426 vanished before elimination [2021-06-12 20:25:58,800 INFO L518 ElimStorePlain]: Eliminatee v_prenex_428 vanished before elimination [2021-06-12 20:25:58,800 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:25:58,800 INFO L518 ElimStorePlain]: Eliminatee v_prenex_430 vanished before elimination [2021-06-12 20:25:58,800 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-06-12 20:25:58,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_434 vanished before elimination [2021-06-12 20:25:58,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_436 vanished before elimination [2021-06-12 20:25:58,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:25:58,803 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 21 variables, input treesize:2043, output treesize:175 [2021-06-12 20:25:58,965 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:25:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:25:59,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876746030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:25:59,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:25:59,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:25:59,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387507768] [2021-06-12 20:25:59,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:25:59,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:25:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:25:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:25:59,173 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:25:59,645 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2021-06-12 20:25:59,962 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 115 [2021-06-12 20:26:00,361 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2021-06-12 20:26:00,639 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-12 20:26:00,912 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-12 20:26:01,261 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-06-12 20:26:01,574 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2021-06-12 20:26:01,932 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2021-06-12 20:26:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:26:01,964 INFO L93 Difference]: Finished difference Result 607 states and 1686 transitions. [2021-06-12 20:26:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:26:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:26:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:26:01,965 INFO L225 Difference]: With dead ends: 607 [2021-06-12 20:26:01,965 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 20:26:01,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3369.7ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:26:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 20:26:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 331. [2021-06-12 20:26:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9545454545454546) internal successors, (975), 330 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 975 transitions. [2021-06-12 20:26:01,970 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 975 transitions. Word has length 20 [2021-06-12 20:26:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:26:01,970 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 975 transitions. [2021-06-12 20:26:01,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 975 transitions. [2021-06-12 20:26:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:26:01,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:26:01,970 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:26:02,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3047 [2021-06-12 20:26:02,171 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:26:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:26:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1536264250, now seen corresponding path program 20 times [2021-06-12 20:26:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:26:02,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014339652] [2021-06-12 20:26:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:26:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:26:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:02,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:26:02,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014339652] [2021-06-12 20:26:02,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014339652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:02,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718404094] [2021-06-12 20:26:02,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:02,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:26:02,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:26:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:26:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:26:03,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:03,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:03,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:03,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:03,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:03,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:03,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:03,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:03,322 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:03,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:03,329 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:03,836 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-06-12 20:26:03,836 INFO L628 ElimStorePlain]: treesize reduction 624, result has 46.0 percent of original size [2021-06-12 20:26:03,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:03,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:03,849 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:03,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:03,855 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:04,062 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 20:26:04,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:04,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:04,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:04,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:26:04,069 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:04,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:26:04,075 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:04,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:04,081 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:04,451 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-06-12 20:26:04,451 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-12 20:26:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:04,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:04,458 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:04,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:04,462 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:04,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:04,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:04,467 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:04,624 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 20:26:04,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:04,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:26:04,633 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1273, output treesize:375 [2021-06-12 20:26:04,872 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 103 [2021-06-12 20:26:05,097 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-06-12 20:26:05,323 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_459, v_prenex_461, array_6, v_prenex_457], 1=[array_0, v_prenex_460, v_prenex_456, v_prenex_458]} [2021-06-12 20:26:05,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:05,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:05,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:05,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:05,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:05,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:05,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,582 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 71 [2021-06-12 20:26:05,582 INFO L628 ElimStorePlain]: treesize reduction 768, result has 18.6 percent of original size [2021-06-12 20:26:05,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:05,587 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:05,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:05,649 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:05,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:05,711 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:05,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:05,767 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:26:05,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_460 vanished before elimination [2021-06-12 20:26:05,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_456 vanished before elimination [2021-06-12 20:26:05,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_458 vanished before elimination [2021-06-12 20:26:05,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:26:05,769 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1167, output treesize:122 [2021-06-12 20:26:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:05,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718404094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:05,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:26:05,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:26:05,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264589324] [2021-06-12 20:26:05,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:26:05,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:26:05,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:26:05,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:26:05,963 INFO L87 Difference]: Start difference. First operand 331 states and 975 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:06,439 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-12 20:26:06,756 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2021-06-12 20:26:07,170 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 145 [2021-06-12 20:26:08,003 WARN L205 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 170 [2021-06-12 20:26:08,252 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-12 20:26:08,496 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-12 20:26:08,692 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-12 20:26:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:26:08,711 INFO L93 Difference]: Finished difference Result 541 states and 1536 transitions. [2021-06-12 20:26:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:26:08,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:26:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:26:08,712 INFO L225 Difference]: With dead ends: 541 [2021-06-12 20:26:08,712 INFO L226 Difference]: Without dead ends: 490 [2021-06-12 20:26:08,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3408.1ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:26:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-12 20:26:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 328. [2021-06-12 20:26:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-12 20:26:08,715 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 20 [2021-06-12 20:26:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:26:08,715 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-12 20:26:08,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-12 20:26:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:26:08,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:26:08,716 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:26:08,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3219,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:08,931 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:26:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:26:08,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1281321126, now seen corresponding path program 21 times [2021-06-12 20:26:08,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:26:08,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887898553] [2021-06-12 20:26:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:26:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:26:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:09,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:26:09,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887898553] [2021-06-12 20:26:09,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887898553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:09,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741153736] [2021-06-12 20:26:09,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:09,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:26:09,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:26:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:26:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:26:09,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:09,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:09,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:09,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:09,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:09,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:09,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:09,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:09,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:09,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:09,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:09,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:09,900 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-06-12 20:26:09,900 INFO L628 ElimStorePlain]: treesize reduction 414, result has 43.8 percent of original size [2021-06-12 20:26:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:09,905 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:09,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:09,910 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:09,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:09,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:09,914 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:10,037 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 20:26:10,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:10,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:10,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:10,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:10,043 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:10,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:10,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:10,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:26:10,048 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:10,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:10,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:10,054 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:10,268 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-12 20:26:10,268 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-12 20:26:10,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:26:10,274 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:251 [2021-06-12 20:26:10,463 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-12 20:26:10,820 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 100 [2021-06-12 20:26:11,062 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-06-12 20:26:11,397 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_482, v_prenex_484, array_6, v_prenex_486], 1=[array_0, v_prenex_481, v_prenex_483, v_prenex_485]} [2021-06-12 20:26:11,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:11,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:11,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:11,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:11,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:11,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:11,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,675 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 73 [2021-06-12 20:26:11,676 INFO L628 ElimStorePlain]: treesize reduction 719, result has 21.8 percent of original size [2021-06-12 20:26:11,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:11,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:11,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:26:11,756 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:11,761 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,877 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-12 20:26:11,877 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.5 percent of original size [2021-06-12 20:26:11,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:11,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:11,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:11,936 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:26:11,936 INFO L518 ElimStorePlain]: Eliminatee v_prenex_481 vanished before elimination [2021-06-12 20:26:11,936 INFO L518 ElimStorePlain]: Eliminatee v_prenex_483 vanished before elimination [2021-06-12 20:26:11,936 INFO L518 ElimStorePlain]: Eliminatee v_prenex_485 vanished before elimination [2021-06-12 20:26:11,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:26:11,938 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:1125, output treesize:122 [2021-06-12 20:26:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:12,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741153736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:12,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:26:12,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:26:12,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135397587] [2021-06-12 20:26:12,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:26:12,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:26:12,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:26:12,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:26:12,126 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:12,717 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 123 [2021-06-12 20:26:13,392 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 182 [2021-06-12 20:26:14,212 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 221 [2021-06-12 20:26:14,981 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 207 [2021-06-12 20:26:15,861 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 239 [2021-06-12 20:26:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:26:15,935 INFO L93 Difference]: Finished difference Result 682 states and 1908 transitions. [2021-06-12 20:26:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:26:15,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:26:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:26:15,936 INFO L225 Difference]: With dead ends: 682 [2021-06-12 20:26:15,936 INFO L226 Difference]: Without dead ends: 642 [2021-06-12 20:26:15,936 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 4503.8ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:26:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-12 20:26:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 335. [2021-06-12 20:26:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9550898203592815) internal successors, (987), 334 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 987 transitions. [2021-06-12 20:26:15,940 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 987 transitions. Word has length 20 [2021-06-12 20:26:15,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:26:15,940 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 987 transitions. [2021-06-12 20:26:15,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 987 transitions. [2021-06-12 20:26:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:26:15,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:26:15,941 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:26:16,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:16,141 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:26:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:26:16,142 INFO L82 PathProgramCache]: Analyzing trace with hash 884403472, now seen corresponding path program 22 times [2021-06-12 20:26:16,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:26:16,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616040276] [2021-06-12 20:26:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:26:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:26:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:16,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:26:16,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616040276] [2021-06-12 20:26:16,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616040276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:16,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374753531] [2021-06-12 20:26:16,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 20:26:16,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:26:16,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:26:16,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:26:16,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:16,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:16,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:16,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,162 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 102 [2021-06-12 20:26:17,163 INFO L628 ElimStorePlain]: treesize reduction 200, result has 63.9 percent of original size [2021-06-12 20:26:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:17,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,298 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 20:26:17,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:17,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:17,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,431 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:26:17,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:17,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:17,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,545 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 20:26:17,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:17,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:26:17,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:17,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:17,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:17,655 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:17,659 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:17,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:17,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:26:17,754 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:561, output treesize:218 [2021-06-12 20:26:17,926 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-12 20:26:18,188 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 92 [2021-06-12 20:26:18,582 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_506, v_prenex_508, array_6, v_prenex_510], 1=[v_prenex_505, array_0, v_prenex_507, v_prenex_509]} [2021-06-12 20:26:18,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:18,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:18,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:18,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:18,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:18,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:18,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:18,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:26:18,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:18,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:18,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:18,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:18,878 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 68 [2021-06-12 20:26:18,879 INFO L628 ElimStorePlain]: treesize reduction 842, result has 18.9 percent of original size [2021-06-12 20:26:18,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:18,884 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:18,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:18,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:18,961 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:19,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:19,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:19,037 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:19,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:19,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_505 vanished before elimination [2021-06-12 20:26:19,106 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:26:19,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_507 vanished before elimination [2021-06-12 20:26:19,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_509 vanished before elimination [2021-06-12 20:26:19,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:26:19,108 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1193, output treesize:143 [2021-06-12 20:26:19,246 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 20:26:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:19,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374753531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:19,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:26:19,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:26:19,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526039893] [2021-06-12 20:26:19,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:26:19,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:26:19,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:26:19,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:26:19,426 INFO L87 Difference]: Start difference. First operand 335 states and 987 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:20,039 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 129 [2021-06-12 20:26:20,624 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 174 [2021-06-12 20:26:21,298 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 181 [2021-06-12 20:26:22,006 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 195 [2021-06-12 20:26:22,825 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 205 [2021-06-12 20:26:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:26:23,009 INFO L93 Difference]: Finished difference Result 685 states and 1942 transitions. [2021-06-12 20:26:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:26:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:26:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:26:23,010 INFO L225 Difference]: With dead ends: 685 [2021-06-12 20:26:23,010 INFO L226 Difference]: Without dead ends: 670 [2021-06-12 20:26:23,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4129.8ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:26:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-12 20:26:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 335. [2021-06-12 20:26:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9550898203592815) internal successors, (987), 334 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 987 transitions. [2021-06-12 20:26:23,015 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 987 transitions. Word has length 20 [2021-06-12 20:26:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:26:23,015 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 987 transitions. [2021-06-12 20:26:23,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 987 transitions. [2021-06-12 20:26:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:26:23,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:26:23,015 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:26:23,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3547 [2021-06-12 20:26:23,216 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:26:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:26:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash -814316916, now seen corresponding path program 23 times [2021-06-12 20:26:23,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:26:23,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270668836] [2021-06-12 20:26:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:26:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:26:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:23,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:26:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270668836] [2021-06-12 20:26:23,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270668836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326635904] [2021-06-12 20:26:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:23,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:26:23,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:26:23,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:26:23,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:26:23,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:23,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:23,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:26:23,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:23,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:23,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:23,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:26:23,632 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:23,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:26:23,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:23,646 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:23,650 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:23,655 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:23,660 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:23,664 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:23,669 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:26:23,673 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:23,678 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:26:23,683 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:26:23,689 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:26:23,694 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:26:23,698 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:23,702 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:26:23,707 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:26:23,711 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:26:23,715 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:26:23,720 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:26:23,724 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:23,728 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:23,733 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:26:23,737 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:23,741 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:23,746 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:23,749 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:26:23,754 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:23,758 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:23,761 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:23,923 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-06-12 20:26:23,924 INFO L628 ElimStorePlain]: treesize reduction 380, result has 32.9 percent of original size [2021-06-12 20:26:23,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:26:23,926 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1873, output treesize:186 [2021-06-12 20:26:24,236 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-06-12 20:26:24,530 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-12 20:26:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326635904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:24,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:26:24,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:26:24,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583096519] [2021-06-12 20:26:24,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:26:24,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:26:24,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:26:24,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:26:24,747 INFO L87 Difference]: Start difference. First operand 335 states and 987 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:25,338 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-06-12 20:26:25,877 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-06-12 20:26:26,045 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-12 20:26:26,289 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-06-12 20:26:26,811 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 89 [2021-06-12 20:26:27,114 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-12 20:26:27,878 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 110 [2021-06-12 20:26:28,184 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-06-12 20:26:28,982 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 113 [2021-06-12 20:26:29,602 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2021-06-12 20:26:30,467 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 119 [2021-06-12 20:26:30,805 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-06-12 20:26:31,546 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 104 [2021-06-12 20:26:32,351 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 110 [2021-06-12 20:26:32,700 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-06-12 20:26:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:26:32,750 INFO L93 Difference]: Finished difference Result 959 states and 2587 transitions. [2021-06-12 20:26:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:26:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:26:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:26:32,752 INFO L225 Difference]: With dead ends: 959 [2021-06-12 20:26:32,752 INFO L226 Difference]: Without dead ends: 863 [2021-06-12 20:26:32,752 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 8497.2ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:26:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-06-12 20:26:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 355. [2021-06-12 20:26:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0084745762711864) internal successors, (1065), 354 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1065 transitions. [2021-06-12 20:26:32,757 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1065 transitions. Word has length 20 [2021-06-12 20:26:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:26:32,757 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1065 transitions. [2021-06-12 20:26:32,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1065 transitions. [2021-06-12 20:26:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:26:32,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:26:32,758 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:26:32,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3704,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:32,959 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:26:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:26:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash -809196446, now seen corresponding path program 24 times [2021-06-12 20:26:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:26:32,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781995537] [2021-06-12 20:26:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:26:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:26:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:33,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:26:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781995537] [2021-06-12 20:26:33,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781995537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446326283] [2021-06-12 20:26:33,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:33,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:26:33,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:26:33,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:26:33,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:26:33,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:33,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:33,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:33,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:33,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:33,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:33,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:33,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:33,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:33,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:33,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:33,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:33,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:34,024 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 20:26:34,024 INFO L628 ElimStorePlain]: treesize reduction 472, result has 43.7 percent of original size [2021-06-12 20:26:34,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:34,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:34,030 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:34,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:34,034 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:34,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:34,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:34,039 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:34,157 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-12 20:26:34,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:34,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:34,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:34,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:26:34,163 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:34,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:34,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:34,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:34,168 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:34,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:34,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:34,173 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:34,378 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-12 20:26:34,378 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-12 20:26:34,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:26:34,384 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:241 [2021-06-12 20:26:34,738 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2021-06-12 20:26:35,102 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_526, v_prenex_528, array_6, v_prenex_530, v_prenex_522, v_prenex_524], 1=[v_prenex_525, v_prenex_527, array_0, v_prenex_529, v_prenex_521, v_prenex_523]} [2021-06-12 20:26:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:35,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:35,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:35,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:26:35,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:35,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:26:35,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:26:35,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,549 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 93 [2021-06-12 20:26:35,550 INFO L628 ElimStorePlain]: treesize reduction 1437, result has 15.4 percent of original size [2021-06-12 20:26:35,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:35,555 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,656 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 20:26:35,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:35,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:26:35,662 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:35,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:35,766 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:35,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:35,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:35,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:35,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:26:35,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:36,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:36,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_525 vanished before elimination [2021-06-12 20:26:36,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_527 vanished before elimination [2021-06-12 20:26:36,061 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:26:36,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_529 vanished before elimination [2021-06-12 20:26:36,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_521 vanished before elimination [2021-06-12 20:26:36,062 INFO L518 ElimStorePlain]: Eliminatee v_prenex_523 vanished before elimination [2021-06-12 20:26:36,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:26:36,064 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1851, output treesize:168 [2021-06-12 20:26:36,226 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-12 20:26:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:36,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446326283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:36,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:26:36,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:26:36,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839600098] [2021-06-12 20:26:36,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:26:36,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:26:36,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:26:36,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:26:36,450 INFO L87 Difference]: Start difference. First operand 355 states and 1065 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:37,007 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 118 [2021-06-12 20:26:37,736 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 139 [2021-06-12 20:26:38,287 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 142 [2021-06-12 20:26:39,087 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 152 [2021-06-12 20:26:39,935 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 157 [2021-06-12 20:26:40,692 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 150 [2021-06-12 20:26:41,543 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 160 [2021-06-12 20:26:42,462 WARN L205 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 165 [2021-06-12 20:26:43,278 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 157 [2021-06-12 20:26:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:26:43,320 INFO L93 Difference]: Finished difference Result 711 states and 1995 transitions. [2021-06-12 20:26:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:26:43,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:26:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:26:43,321 INFO L225 Difference]: With dead ends: 711 [2021-06-12 20:26:43,321 INFO L226 Difference]: Without dead ends: 681 [2021-06-12 20:26:43,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 7419.1ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:26:43,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-12 20:26:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 359. [2021-06-12 20:26:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.0195530726256985) internal successors, (1081), 358 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1081 transitions. [2021-06-12 20:26:43,326 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1081 transitions. Word has length 20 [2021-06-12 20:26:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:26:43,326 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1081 transitions. [2021-06-12 20:26:43,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1081 transitions. [2021-06-12 20:26:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:26:43,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:26:43,327 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:26:43,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3748 [2021-06-12 20:26:43,527 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:26:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:26:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1859986214, now seen corresponding path program 25 times [2021-06-12 20:26:43,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:26:43,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712879045] [2021-06-12 20:26:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:26:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:26:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:43,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:26:43,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712879045] [2021-06-12 20:26:43,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712879045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:43,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332769654] [2021-06-12 20:26:43,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:26:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:26:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:26:44,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:44,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:44,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:44,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:44,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:44,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:44,210 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,532 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-12 20:26:44,532 INFO L628 ElimStorePlain]: treesize reduction 401, result has 48.4 percent of original size [2021-06-12 20:26:44,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:44,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:26:44,542 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:44,547 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,681 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 20:26:44,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:44,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:44,687 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:44,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:26:44,692 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:26:44,696 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:44,804 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-12 20:26:44,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:44,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:26:44,811 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:259 [2021-06-12 20:26:45,000 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-06-12 20:26:45,227 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 98 [2021-06-12 20:26:45,658 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_548, v_prenex_550, array_6, v_prenex_542, v_prenex_544, v_prenex_546], 1=[v_prenex_547, v_prenex_549, array_0, v_prenex_541, v_prenex_543, v_prenex_545]} [2021-06-12 20:26:45,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:45,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:45,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:45,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:45,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:26:45,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:45,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:45,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:45,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:26:45,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:45,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:26:45,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:46,166 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 103 [2021-06-12 20:26:46,167 INFO L628 ElimStorePlain]: treesize reduction 1445, result has 17.4 percent of original size [2021-06-12 20:26:46,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:46,173 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:46,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:46,179 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:46,391 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2021-06-12 20:26:46,392 INFO L628 ElimStorePlain]: treesize reduction 29, result has 89.8 percent of original size [2021-06-12 20:26:46,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:46,397 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:46,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:46,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:46,501 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:46,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:46,603 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:46,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:26:46,702 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:46,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:46,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_547 vanished before elimination [2021-06-12 20:26:46,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_549 vanished before elimination [2021-06-12 20:26:46,794 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:26:46,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_541 vanished before elimination [2021-06-12 20:26:46,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_543 vanished before elimination [2021-06-12 20:26:46,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_545 vanished before elimination [2021-06-12 20:26:46,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:26:46,797 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1899, output treesize:198 [2021-06-12 20:26:46,963 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:26:47,149 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-06-12 20:26:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332769654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:47,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:26:47,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:26:47,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960507994] [2021-06-12 20:26:47,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:26:47,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:26:47,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:26:47,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:26:47,224 INFO L87 Difference]: Start difference. First operand 359 states and 1081 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:47,808 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2021-06-12 20:26:48,508 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 146 [2021-06-12 20:26:48,997 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 141 [2021-06-12 20:26:49,693 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 148 [2021-06-12 20:26:49,840 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-12 20:26:50,196 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 141 [2021-06-12 20:26:51,058 WARN L205 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 167 [2021-06-12 20:26:51,241 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-12 20:26:51,667 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 146 [2021-06-12 20:26:52,464 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-06-12 20:26:53,465 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 186 [2021-06-12 20:26:53,646 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2021-06-12 20:26:54,057 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 149 [2021-06-12 20:26:54,992 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 172 [2021-06-12 20:26:56,028 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 189 [2021-06-12 20:26:56,229 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-06-12 20:26:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:26:56,309 INFO L93 Difference]: Finished difference Result 971 states and 2721 transitions. [2021-06-12 20:26:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:26:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:26:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:26:56,311 INFO L225 Difference]: With dead ends: 971 [2021-06-12 20:26:56,311 INFO L226 Difference]: Without dead ends: 912 [2021-06-12 20:26:56,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 9501.5ms TimeCoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:26:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-06-12 20:26:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 365. [2021-06-12 20:26:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0274725274725274) internal successors, (1102), 364 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1102 transitions. [2021-06-12 20:26:56,316 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1102 transitions. Word has length 20 [2021-06-12 20:26:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:26:56,316 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1102 transitions. [2021-06-12 20:26:56,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1102 transitions. [2021-06-12 20:26:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:26:56,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:26:56,317 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:26:56,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3939 [2021-06-12 20:26:56,533 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:26:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:26:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash 246419480, now seen corresponding path program 26 times [2021-06-12 20:26:56,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:26:56,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110697026] [2021-06-12 20:26:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:26:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:26:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:56,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:26:56,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110697026] [2021-06-12 20:26:56,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110697026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:56,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490641723] [2021-06-12 20:26:56,694 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:26:56,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:26:56,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:26:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:26:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:26:56,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:56,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:56,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:56,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:56,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:56,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:56,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:56,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:56,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:56,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:56,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:56,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:56,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:56,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:56,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:26:56,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:57,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:26:57,007 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,229 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-12 20:26:57,230 INFO L628 ElimStorePlain]: treesize reduction 369, result has 39.0 percent of original size [2021-06-12 20:26:57,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:57,234 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:57,239 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:57,243 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:57,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:26:57,333 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:57,337 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:26:57,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:26:57,342 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:57,475 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-12 20:26:57,476 INFO L628 ElimStorePlain]: treesize reduction 27, result has 85.0 percent of original size [2021-06-12 20:26:57,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:26:57,479 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:715, output treesize:135 [2021-06-12 20:26:58,384 INFO L446 ElimStorePlain]: Different costs {0=[array_6, v_prenex_562, v_prenex_564, v_prenex_568], 1=[array_0, v_prenex_561, v_prenex_563, v_prenex_567]} [2021-06-12 20:26:58,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:26:58,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:58,551 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2021-06-12 20:26:58,551 INFO L628 ElimStorePlain]: treesize reduction 347, result has 30.0 percent of original size [2021-06-12 20:26:58,551 INFO L518 ElimStorePlain]: Eliminatee v_prenex_562 vanished before elimination [2021-06-12 20:26:58,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:26:58,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:26:58,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:26:58,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_568 vanished before elimination [2021-06-12 20:26:58,609 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:26:58,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_561 vanished before elimination [2021-06-12 20:26:58,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_563 vanished before elimination [2021-06-12 20:26:58,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_567 vanished before elimination [2021-06-12 20:26:58,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:26:58,610 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 12 variables, input treesize:503, output treesize:126 [2021-06-12 20:26:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:26:58,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490641723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:26:58,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:26:58,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:26:58,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006160078] [2021-06-12 20:26:58,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:26:58,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:26:58,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:26:58,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:26:58,801 INFO L87 Difference]: Start difference. First operand 365 states and 1102 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:26:59,283 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2021-06-12 20:26:59,615 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 80 [2021-06-12 20:26:59,790 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-12 20:27:00,045 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-06-12 20:27:00,382 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 92 [2021-06-12 20:27:00,634 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-12 20:27:01,000 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 93 [2021-06-12 20:27:01,465 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 106 [2021-06-12 20:27:01,841 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 106 [2021-06-12 20:27:02,249 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 96 [2021-06-12 20:27:02,761 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 109 [2021-06-12 20:27:03,025 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2021-06-12 20:27:03,458 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2021-06-12 20:27:04,055 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 116 [2021-06-12 20:27:04,356 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2021-06-12 20:27:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:04,402 INFO L93 Difference]: Finished difference Result 797 states and 2283 transitions. [2021-06-12 20:27:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:27:04,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:27:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:04,403 INFO L225 Difference]: With dead ends: 797 [2021-06-12 20:27:04,403 INFO L226 Difference]: Without dead ends: 767 [2021-06-12 20:27:04,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 5876.2ms TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:27:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-06-12 20:27:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 368. [2021-06-12 20:27:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.035422343324251) internal successors, (1114), 367 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1114 transitions. [2021-06-12 20:27:04,408 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1114 transitions. Word has length 20 [2021-06-12 20:27:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:04,408 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1114 transitions. [2021-06-12 20:27:04,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1114 transitions. [2021-06-12 20:27:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:27:04,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:04,409 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:27:04,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-12 20:27:04,609 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:27:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -492920346, now seen corresponding path program 27 times [2021-06-12 20:27:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:04,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255434294] [2021-06-12 20:27:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:04,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:04,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255434294] [2021-06-12 20:27:04,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255434294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:04,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369721560] [2021-06-12 20:27:04,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:04,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:27:04,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:27:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:05,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:05,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:05,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:05,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:05,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:05,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:05,545 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 102 [2021-06-12 20:27:05,546 INFO L628 ElimStorePlain]: treesize reduction 185, result has 65.2 percent of original size [2021-06-12 20:27:05,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:27:05,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:05,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:05,678 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:27:05,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:05,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:27:05,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:05,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:05,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:05,886 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2021-06-12 20:27:05,887 INFO L628 ElimStorePlain]: treesize reduction 27, result has 90.4 percent of original size [2021-06-12 20:27:05,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:05,892 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:05,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:05,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:05,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:05,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:06,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:06,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:06,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:06,093 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:06,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:06,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:27:06,188 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:561, output treesize:218 [2021-06-12 20:27:06,356 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-12 20:27:06,690 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_591, v_prenex_583, array_6, v_prenex_585, v_prenex_587, v_prenex_589], 1=[array_0, v_prenex_590, v_prenex_582, v_prenex_584, v_prenex_586, v_prenex_588]} [2021-06-12 20:27:06,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:06,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:06,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:27:06,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:06,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:27:06,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:06,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:27:06,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:06,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:06,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:06,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:27:06,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:07,128 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 94 [2021-06-12 20:27:07,128 INFO L628 ElimStorePlain]: treesize reduction 1320, result has 16.9 percent of original size [2021-06-12 20:27:07,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:07,134 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:07,239 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:27:07,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:07,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:27:07,245 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:07,348 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:27:07,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:07,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:27:07,354 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:07,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:07,359 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:07,537 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-12 20:27:07,538 INFO L628 ElimStorePlain]: treesize reduction 27, result has 88.2 percent of original size [2021-06-12 20:27:07,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:07,542 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:07,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:07,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:07,630 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:07,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:07,712 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:27:07,712 INFO L518 ElimStorePlain]: Eliminatee v_prenex_590 vanished before elimination [2021-06-12 20:27:07,712 INFO L518 ElimStorePlain]: Eliminatee v_prenex_582 vanished before elimination [2021-06-12 20:27:07,712 INFO L518 ElimStorePlain]: Eliminatee v_prenex_584 vanished before elimination [2021-06-12 20:27:07,712 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-06-12 20:27:07,712 INFO L518 ElimStorePlain]: Eliminatee v_prenex_588 vanished before elimination [2021-06-12 20:27:07,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:27:07,715 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1703, output treesize:140 [2021-06-12 20:27:07,852 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:27:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:08,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369721560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:08,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:08,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:27:08,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048278318] [2021-06-12 20:27:08,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:27:08,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:08,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:27:08,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:27:08,167 INFO L87 Difference]: Start difference. First operand 368 states and 1114 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:08,824 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-06-12 20:27:09,332 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 122 [2021-06-12 20:27:09,817 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 124 [2021-06-12 20:27:10,382 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 130 [2021-06-12 20:27:10,962 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 134 [2021-06-12 20:27:11,615 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 140 [2021-06-12 20:27:12,270 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 139 [2021-06-12 20:27:12,953 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 145 [2021-06-12 20:27:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:13,029 INFO L93 Difference]: Finished difference Result 856 states and 2441 transitions. [2021-06-12 20:27:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:27:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:27:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:13,031 INFO L225 Difference]: With dead ends: 856 [2021-06-12 20:27:13,031 INFO L226 Difference]: Without dead ends: 826 [2021-06-12 20:27:13,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5213.6ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:27:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-12 20:27:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 372. [2021-06-12 20:27:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.056603773584906) internal successors, (1134), 371 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1134 transitions. [2021-06-12 20:27:13,036 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1134 transitions. Word has length 20 [2021-06-12 20:27:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:13,036 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1134 transitions. [2021-06-12 20:27:13,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:13,036 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1134 transitions. [2021-06-12 20:27:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:27:13,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:13,037 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:27:13,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4228,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:13,237 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:27:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:13,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1711555706, now seen corresponding path program 28 times [2021-06-12 20:27:13,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:13,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689546516] [2021-06-12 20:27:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:13,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:13,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689546516] [2021-06-12 20:27:13,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689546516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:13,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152625904] [2021-06-12 20:27:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:13,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:27:13,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:27:13,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:13,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:13,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:27:13,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:13,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:13,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:13,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:13,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:13,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:13,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:13,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:13,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:13,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:14,240 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-12 20:27:14,240 INFO L628 ElimStorePlain]: treesize reduction 403, result has 46.1 percent of original size [2021-06-12 20:27:14,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:14,246 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:14,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:14,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:14,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:14,256 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:14,480 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-12 20:27:14,481 INFO L628 ElimStorePlain]: treesize reduction 30, result has 90.3 percent of original size [2021-06-12 20:27:14,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:14,486 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:14,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:14,491 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:14,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:14,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:14,495 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:14,602 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-12 20:27:14,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:14,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:27:14,612 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:251 [2021-06-12 20:27:14,800 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-12 20:27:15,145 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_602, v_prenex_604, v_prenex_606, v_prenex_608, array_6, v_prenex_610], 1=[v_prenex_603, array_0, v_prenex_605, v_prenex_607, v_prenex_609, v_prenex_601]} [2021-06-12 20:27:15,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:15,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:15,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:15,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:15,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:15,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:27:15,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:15,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:15,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:15,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:15,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:15,195 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:15,612 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 98 [2021-06-12 20:27:15,613 INFO L628 ElimStorePlain]: treesize reduction 1435, result has 15.2 percent of original size [2021-06-12 20:27:15,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:15,619 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:15,725 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 20:27:15,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:15,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:15,730 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:15,835 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 20:27:15,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:15,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:27:15,841 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:15,944 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:27:15,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:15,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:15,950 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:16,054 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:27:16,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:16,059 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:16,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:16,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_603 vanished before elimination [2021-06-12 20:27:16,156 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:27:16,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_605 vanished before elimination [2021-06-12 20:27:16,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_607 vanished before elimination [2021-06-12 20:27:16,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-06-12 20:27:16,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_601 vanished before elimination [2021-06-12 20:27:16,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:27:16,160 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1817, output treesize:194 [2021-06-12 20:27:16,328 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:27:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:16,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152625904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:16,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:16,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:27:16,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051372401] [2021-06-12 20:27:16,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:27:16,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:16,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:27:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:27:16,644 INFO L87 Difference]: Start difference. First operand 372 states and 1134 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:17,199 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 123 [2021-06-12 20:27:17,635 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 128 [2021-06-12 20:27:18,067 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 130 [2021-06-12 20:27:18,593 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 139 [2021-06-12 20:27:19,279 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 137 [2021-06-12 20:27:20,020 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 146 [2021-06-12 20:27:20,770 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 145 [2021-06-12 20:27:21,562 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 154 [2021-06-12 20:27:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:21,633 INFO L93 Difference]: Finished difference Result 857 states and 2432 transitions. [2021-06-12 20:27:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:27:21,633 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:27:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:21,634 INFO L225 Difference]: With dead ends: 857 [2021-06-12 20:27:21,634 INFO L226 Difference]: Without dead ends: 827 [2021-06-12 20:27:21,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5416.2ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:27:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-12 20:27:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 372. [2021-06-12 20:27:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.056603773584906) internal successors, (1134), 371 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1134 transitions. [2021-06-12 20:27:21,640 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1134 transitions. Word has length 20 [2021-06-12 20:27:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:21,640 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1134 transitions. [2021-06-12 20:27:21,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1134 transitions. [2021-06-12 20:27:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:27:21,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:21,640 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:27:21,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4358,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:21,841 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:27:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash 496140202, now seen corresponding path program 29 times [2021-06-12 20:27:21,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:21,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230289235] [2021-06-12 20:27:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:22,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:22,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230289235] [2021-06-12 20:27:22,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230289235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:22,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490421868] [2021-06-12 20:27:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:22,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:27:22,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:22,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:27:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:22,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:22,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:22,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:22,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:27:22,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:22,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:27:22,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:27:22,220 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:22,225 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:27:22,230 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:22,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:27:22,239 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:22,244 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:22,249 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:22,254 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:22,259 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:27:22,265 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:22,270 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:27:22,275 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:27:22,280 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:27:22,285 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:27:22,290 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:22,294 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:22,299 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:22,304 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:27:22,308 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:27:22,313 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:27:22,317 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:22,322 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:22,327 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:27:22,332 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:22,336 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:22,341 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:27:22,345 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:27:22,350 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:22,354 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:27:22,358 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:22,528 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-06-12 20:27:22,528 INFO L628 ElimStorePlain]: treesize reduction 380, result has 32.9 percent of original size [2021-06-12 20:27:22,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:27:22,530 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1873, output treesize:186 [2021-06-12 20:27:22,962 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-12 20:27:23,193 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-06-12 20:27:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:23,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490421868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:23,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:23,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:27:23,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353746212] [2021-06-12 20:27:23,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:27:23,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:23,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:27:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:27:23,380 INFO L87 Difference]: Start difference. First operand 372 states and 1134 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:23,956 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-12 20:27:24,149 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-12 20:27:24,490 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2021-06-12 20:27:24,677 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-12 20:27:25,120 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-12 20:27:25,344 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-12 20:27:25,760 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-12 20:27:26,344 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 98 [2021-06-12 20:27:26,575 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-06-12 20:27:27,083 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2021-06-12 20:27:27,687 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 101 [2021-06-12 20:27:28,311 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 105 [2021-06-12 20:27:28,556 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-12 20:27:29,116 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 94 [2021-06-12 20:27:29,773 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 108 [2021-06-12 20:27:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:29,826 INFO L93 Difference]: Finished difference Result 1092 states and 3018 transitions. [2021-06-12 20:27:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:27:29,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:27:29,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:29,828 INFO L225 Difference]: With dead ends: 1092 [2021-06-12 20:27:29,828 INFO L226 Difference]: Without dead ends: 1020 [2021-06-12 20:27:29,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6906.1ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:27:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-06-12 20:27:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 372. [2021-06-12 20:27:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.070080862533693) internal successors, (1139), 371 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1139 transitions. [2021-06-12 20:27:29,833 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1139 transitions. Word has length 20 [2021-06-12 20:27:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:29,834 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1139 transitions. [2021-06-12 20:27:29,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1139 transitions. [2021-06-12 20:27:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:27:29,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:29,834 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:27:30,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4493 [2021-06-12 20:27:30,050 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:27:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash -690985846, now seen corresponding path program 30 times [2021-06-12 20:27:30,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:30,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794367468] [2021-06-12 20:27:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:30,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:30,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794367468] [2021-06-12 20:27:30,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794367468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:30,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020086152] [2021-06-12 20:27:30,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:30,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:27:30,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:30,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:27:30,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:30,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:27:30,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:30,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:27:30,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:30,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:30,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:30,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:30,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:30,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:30,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:30,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:27:30,779 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,107 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 20:27:31,107 INFO L628 ElimStorePlain]: treesize reduction 472, result has 43.7 percent of original size [2021-06-12 20:27:31,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:27:31,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:31,118 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:31,122 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,380 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 20:27:31,380 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:27:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:31,385 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:31,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:31,390 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:27:31,394 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,496 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-12 20:27:31,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:31,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:27:31,502 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:241 [2021-06-12 20:27:31,956 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_625, v_prenex_627, v_prenex_629, array_6, v_prenex_621, v_prenex_623], 1=[v_prenex_624, v_prenex_626, array_0, v_prenex_628, v_prenex_620, v_prenex_622]} [2021-06-12 20:27:31,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:31,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:31,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:31,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:31,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:31,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:27:31,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:27:31,995 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:32,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:32,003 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:32,410 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 92 [2021-06-12 20:27:32,411 INFO L628 ElimStorePlain]: treesize reduction 1435, result has 15.2 percent of original size [2021-06-12 20:27:32,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:32,416 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:32,522 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:27:32,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:32,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:32,528 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:32,629 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:27:32,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:32,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:32,634 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:32,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:32,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:32,737 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:32,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:32,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:27:32,837 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:32,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:32,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_624 vanished before elimination [2021-06-12 20:27:32,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_626 vanished before elimination [2021-06-12 20:27:32,931 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:27:32,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_628 vanished before elimination [2021-06-12 20:27:32,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_620 vanished before elimination [2021-06-12 20:27:32,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_622 vanished before elimination [2021-06-12 20:27:32,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:27:32,934 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1817, output treesize:164 [2021-06-12 20:27:33,093 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-12 20:27:33,259 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:27:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:33,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020086152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:33,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:33,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:27:33,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128019056] [2021-06-12 20:27:33,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:27:33,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:33,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:27:33,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:27:33,476 INFO L87 Difference]: Start difference. First operand 372 states and 1139 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:34,051 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-06-12 20:27:34,514 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 126 [2021-06-12 20:27:34,919 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 124 [2021-06-12 20:27:35,420 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 105 [2021-06-12 20:27:36,104 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 131 [2021-06-12 20:27:36,711 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 115 [2021-06-12 20:27:37,440 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 139 [2021-06-12 20:27:38,084 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 125 [2021-06-12 20:27:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:38,134 INFO L93 Difference]: Finished difference Result 864 states and 2440 transitions. [2021-06-12 20:27:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:27:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:27:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:38,135 INFO L225 Difference]: With dead ends: 864 [2021-06-12 20:27:38,135 INFO L226 Difference]: Without dead ends: 834 [2021-06-12 20:27:38,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5172.7ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:27:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-06-12 20:27:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 376. [2021-06-12 20:27:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.0853333333333333) internal successors, (1157), 375 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1157 transitions. [2021-06-12 20:27:38,141 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1157 transitions. Word has length 20 [2021-06-12 20:27:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:38,141 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1157 transitions. [2021-06-12 20:27:38,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1157 transitions. [2021-06-12 20:27:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:27:38,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:38,141 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:27:38,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4547,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:38,342 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:27:38,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:38,342 INFO L82 PathProgramCache]: Analyzing trace with hash 341702684, now seen corresponding path program 31 times [2021-06-12 20:27:38,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:38,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546807017] [2021-06-12 20:27:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:38,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:38,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546807017] [2021-06-12 20:27:38,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546807017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:38,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908818322] [2021-06-12 20:27:38,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:27:38,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:38,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:38,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:38,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:38,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:38,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:38,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:38,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:27:38,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:38,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:38,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:38,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:39,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:39,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:27:39,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:27:39,017 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,357 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-12 20:27:39,357 INFO L628 ElimStorePlain]: treesize reduction 472, result has 43.7 percent of original size [2021-06-12 20:27:39,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:39,363 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:27:39,367 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:39,372 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,489 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 20:27:39,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:39,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:39,495 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:39,500 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:39,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:39,504 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:39,716 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-12 20:27:39,717 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-12 20:27:39,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:27:39,723 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:251 [2021-06-12 20:27:39,912 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-12 20:27:40,464 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 102 [2021-06-12 20:27:40,762 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_657, v_prenex_659, v_prenex_649, array_6, v_prenex_651, v_prenex_653, v_prenex_655], 1=[v_prenex_658, v_prenex_648, array_0, v_prenex_650, v_prenex_652, v_prenex_654, v_prenex_656]} [2021-06-12 20:27:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:40,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:40,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:40,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:27:40,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:27:40,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:40,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:40,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:40,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:27:40,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:40,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:40,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:41,275 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 103 [2021-06-12 20:27:41,275 INFO L628 ElimStorePlain]: treesize reduction 1612, result has 14.4 percent of original size [2021-06-12 20:27:41,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:41,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:41,386 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 20:27:41,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:41,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:41,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:41,495 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 20:27:41,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:41,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:41,501 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:41,602 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 20:27:41,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:41,607 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:41,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:41,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:27:41,711 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:41,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:41,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:41,813 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:41,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:41,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_658 vanished before elimination [2021-06-12 20:27:41,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_648 vanished before elimination [2021-06-12 20:27:41,905 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:27:41,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_650 vanished before elimination [2021-06-12 20:27:41,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_652 vanished before elimination [2021-06-12 20:27:41,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_654 vanished before elimination [2021-06-12 20:27:41,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_656 vanished before elimination [2021-06-12 20:27:41,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:27:41,908 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2043, output treesize:175 [2021-06-12 20:27:42,070 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:27:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:42,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908818322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:42,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:42,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:27:42,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262754663] [2021-06-12 20:27:42,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:27:42,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:42,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:27:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:27:42,255 INFO L87 Difference]: Start difference. First operand 376 states and 1157 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:42,831 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 123 [2021-06-12 20:27:43,428 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 128 [2021-06-12 20:27:44,323 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 197 [2021-06-12 20:27:44,815 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-06-12 20:27:45,311 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 139 [2021-06-12 20:27:45,721 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2021-06-12 20:27:46,189 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 143 [2021-06-12 20:27:46,721 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 146 [2021-06-12 20:27:47,177 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 137 [2021-06-12 20:27:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:47,225 INFO L93 Difference]: Finished difference Result 759 states and 2172 transitions. [2021-06-12 20:27:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:27:47,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:27:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:47,226 INFO L225 Difference]: With dead ends: 759 [2021-06-12 20:27:47,226 INFO L226 Difference]: Without dead ends: 729 [2021-06-12 20:27:47,226 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 5589.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:27:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-12 20:27:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 376. [2021-06-12 20:27:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.0853333333333333) internal successors, (1157), 375 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1157 transitions. [2021-06-12 20:27:47,231 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1157 transitions. Word has length 20 [2021-06-12 20:27:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:47,231 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1157 transitions. [2021-06-12 20:27:47,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1157 transitions. [2021-06-12 20:27:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:27:47,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:47,232 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:27:47,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4699 [2021-06-12 20:27:47,432 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:27:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -828486312, now seen corresponding path program 32 times [2021-06-12 20:27:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:47,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911903345] [2021-06-12 20:27:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:47,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:47,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911903345] [2021-06-12 20:27:47,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911903345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:47,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334603589] [2021-06-12 20:27:47,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:47,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:27:47,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:27:47,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:47,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:47,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:47,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:47,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:27:47,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:47,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:47,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:47,938 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:48,149 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-12 20:27:48,150 INFO L628 ElimStorePlain]: treesize reduction 322, result has 40.6 percent of original size [2021-06-12 20:27:48,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:48,154 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:48,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:48,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:48,164 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:48,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:48,168 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:48,314 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-12 20:27:48,314 INFO L628 ElimStorePlain]: treesize reduction 25, result has 87.4 percent of original size [2021-06-12 20:27:48,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:48,318 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:48,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:48,322 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:48,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:48,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:48,326 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:48,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:48,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:27:48,398 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:715, output treesize:135 [2021-06-12 20:27:48,531 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-12 20:27:49,218 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_668, v_prenex_670, v_prenex_672, array_6], 1=[v_prenex_669, array_0, v_prenex_671, v_prenex_667]} [2021-06-12 20:27:49,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:49,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:49,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:27:49,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:49,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:27:49,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:49,260 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,589 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2021-06-12 20:27:49,590 INFO L628 ElimStorePlain]: treesize reduction 883, result has 23.5 percent of original size [2021-06-12 20:27:49,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:49,595 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,700 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 20:27:49,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:49,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:49,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:49,709 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:49,907 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-12 20:27:49,907 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-12 20:27:49,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:49,912 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:50,013 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-12 20:27:50,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:50,013 INFO L518 ElimStorePlain]: Eliminatee v_prenex_669 vanished before elimination [2021-06-12 20:27:50,013 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:27:50,013 INFO L518 ElimStorePlain]: Eliminatee v_prenex_671 vanished before elimination [2021-06-12 20:27:50,013 INFO L518 ElimStorePlain]: Eliminatee v_prenex_667 vanished before elimination [2021-06-12 20:27:50,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:27:50,016 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:1348, output treesize:205 [2021-06-12 20:27:50,157 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-12 20:27:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:50,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334603589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:50,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:50,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:27:50,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007081070] [2021-06-12 20:27:50,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:27:50,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:27:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:27:50,367 INFO L87 Difference]: Start difference. First operand 376 states and 1157 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:50,843 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2021-06-12 20:27:51,120 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2021-06-12 20:27:51,443 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 90 [2021-06-12 20:27:51,690 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2021-06-12 20:27:52,367 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 106 [2021-06-12 20:27:52,895 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-12 20:27:53,280 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 116 [2021-06-12 20:27:53,618 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-12 20:27:54,033 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 122 [2021-06-12 20:27:54,291 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 103 [2021-06-12 20:27:54,683 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 121 [2021-06-12 20:27:55,042 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 110 [2021-06-12 20:27:55,345 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2021-06-12 20:27:55,947 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 125 [2021-06-12 20:27:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:27:56,011 INFO L93 Difference]: Finished difference Result 927 states and 2581 transitions. [2021-06-12 20:27:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:27:56,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:27:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:27:56,012 INFO L225 Difference]: With dead ends: 927 [2021-06-12 20:27:56,012 INFO L226 Difference]: Without dead ends: 853 [2021-06-12 20:27:56,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5996.6ms TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:27:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-06-12 20:27:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 382. [2021-06-12 20:27:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.094488188976378) internal successors, (1179), 381 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1179 transitions. [2021-06-12 20:27:56,018 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1179 transitions. Word has length 20 [2021-06-12 20:27:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:27:56,018 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1179 transitions. [2021-06-12 20:27:56,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:27:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1179 transitions. [2021-06-12 20:27:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:27:56,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:27:56,018 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:27:56,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4868,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:56,219 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:27:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:27:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash 637711574, now seen corresponding path program 33 times [2021-06-12 20:27:56,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:27:56,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957736750] [2021-06-12 20:27:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:27:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:27:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:56,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:27:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957736750] [2021-06-12 20:27:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957736750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373515658] [2021-06-12 20:27:56,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:27:56,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:27:56,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:27:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:27:56,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:27:56,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:56,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:56,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:56,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:56,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:56,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:56,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:56,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:56,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:56,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:27:56,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:57,161 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2021-06-12 20:27:57,162 INFO L628 ElimStorePlain]: treesize reduction 165, result has 67.5 percent of original size [2021-06-12 20:27:57,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:57,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:57,299 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 20:27:57,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:57,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:57,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:57,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:57,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:57,430 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:27:57,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:57,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:27:57,437 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:57,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:57,442 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:57,555 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:27:57,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:57,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:57,561 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:57,676 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:27:57,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:57,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:27:57,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:27:57,682 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:57,791 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:27:57,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:57,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:27:57,797 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:597, output treesize:259 [2021-06-12 20:27:57,989 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2021-06-12 20:27:58,500 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_691, v_prenex_693, array_6, v_prenex_695, v_prenex_687, v_prenex_689], 1=[array_0, v_prenex_690, v_prenex_692, v_prenex_694, v_prenex_686, v_prenex_688]} [2021-06-12 20:27:58,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:27:58,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:58,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:27:58,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:58,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:27:58,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:58,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:27:58,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:58,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:27:58,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:58,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:27:58,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:58,984 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 100 [2021-06-12 20:27:58,984 INFO L628 ElimStorePlain]: treesize reduction 1502, result has 15.1 percent of original size [2021-06-12 20:27:58,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:58,990 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:59,096 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:27:59,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:59,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:59,102 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:59,207 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:27:59,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:59,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:27:59,219 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:59,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:59,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:27:59,323 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:59,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:27:59,422 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:27:59,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:27:59,515 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:27:59,515 INFO L518 ElimStorePlain]: Eliminatee v_prenex_690 vanished before elimination [2021-06-12 20:27:59,515 INFO L518 ElimStorePlain]: Eliminatee v_prenex_692 vanished before elimination [2021-06-12 20:27:59,515 INFO L518 ElimStorePlain]: Eliminatee v_prenex_694 vanished before elimination [2021-06-12 20:27:59,515 INFO L518 ElimStorePlain]: Eliminatee v_prenex_686 vanished before elimination [2021-06-12 20:27:59,515 INFO L518 ElimStorePlain]: Eliminatee v_prenex_688 vanished before elimination [2021-06-12 20:27:59,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:27:59,518 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1893, output treesize:198 [2021-06-12 20:27:59,684 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:27:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:27:59,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373515658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:27:59,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:27:59,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:27:59,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537492570] [2021-06-12 20:27:59,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:27:59,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:27:59,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:27:59,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:27:59,905 INFO L87 Difference]: Start difference. First operand 382 states and 1179 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:00,460 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 124 [2021-06-12 20:28:00,682 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-12 20:28:01,029 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 129 [2021-06-12 20:28:01,228 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-12 20:28:01,574 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 135 [2021-06-12 20:28:02,074 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 137 [2021-06-12 20:28:02,276 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-12 20:28:02,660 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 141 [2021-06-12 20:28:03,317 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 146 [2021-06-12 20:28:03,558 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-12 20:28:03,972 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 144 [2021-06-12 20:28:04,643 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 152 [2021-06-12 20:28:05,064 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 139 [2021-06-12 20:28:05,731 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 153 [2021-06-12 20:28:05,959 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-12 20:28:06,720 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 162 [2021-06-12 20:28:07,171 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 146 [2021-06-12 20:28:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:07,242 INFO L93 Difference]: Finished difference Result 930 states and 2632 transitions. [2021-06-12 20:28:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:28:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:07,244 INFO L225 Difference]: With dead ends: 930 [2021-06-12 20:28:07,244 INFO L226 Difference]: Without dead ends: 885 [2021-06-12 20:28:07,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 7657.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:28:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-06-12 20:28:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 386. [2021-06-12 20:28:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.103896103896104) internal successors, (1195), 385 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1195 transitions. [2021-06-12 20:28:07,249 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1195 transitions. Word has length 20 [2021-06-12 20:28:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:07,249 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1195 transitions. [2021-06-12 20:28:07,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1195 transitions. [2021-06-12 20:28:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:07,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:07,250 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:07,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5053 [2021-06-12 20:28:07,466 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:07,466 INFO L82 PathProgramCache]: Analyzing trace with hash -426176046, now seen corresponding path program 34 times [2021-06-12 20:28:07,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:07,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243471269] [2021-06-12 20:28:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:07,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:07,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243471269] [2021-06-12 20:28:07,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243471269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:07,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831140263] [2021-06-12 20:28:07,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:07,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:28:07,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:28:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:08,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:08,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:08,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:08,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:08,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:08,235 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,570 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-06-12 20:28:08,570 INFO L628 ElimStorePlain]: treesize reduction 421, result has 44.2 percent of original size [2021-06-12 20:28:08,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:08,576 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:08,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:08,586 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,827 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-12 20:28:08,828 INFO L628 ElimStorePlain]: treesize reduction 40, result has 86.9 percent of original size [2021-06-12 20:28:08,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:08,833 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:08,837 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:08,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:08,842 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:08,955 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-12 20:28:08,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:08,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:28:08,960 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:235 [2021-06-12 20:28:09,185 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-12 20:28:09,599 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-06-12 20:28:09,886 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_712, v_prenex_706, v_prenex_708, array_6, v_prenex_710], 1=[v_prenex_705, array_3, v_prenex_707, v_prenex_709, v_prenex_711]} [2021-06-12 20:28:09,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:09,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:09,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:09,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:09,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:09,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:09,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:09,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:09,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:09,928 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:09,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:09,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:10,336 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 84 [2021-06-12 20:28:10,336 INFO L628 ElimStorePlain]: treesize reduction 1226, result has 18.9 percent of original size [2021-06-12 20:28:10,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:10,341 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:10,449 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:28:10,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:10,454 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:10,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:10,459 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:10,662 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-06-12 20:28:10,662 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-12 20:28:10,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:28:10,667 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:10,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:10,770 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:10,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:10,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_705 vanished before elimination [2021-06-12 20:28:10,867 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:28:10,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_707 vanished before elimination [2021-06-12 20:28:10,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_709 vanished before elimination [2021-06-12 20:28:10,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-06-12 20:28:10,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-12 20:28:10,870 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:1621, output treesize:200 [2021-06-12 20:28:11,010 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:28:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:11,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831140263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:11,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:11,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:28:11,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314339499] [2021-06-12 20:28:11,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:28:11,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:11,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:28:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:28:11,084 INFO L87 Difference]: Start difference. First operand 386 states and 1195 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:11,570 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-12 20:28:11,846 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 102 [2021-06-12 20:28:12,508 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 131 [2021-06-12 20:28:12,790 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-12 20:28:13,101 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2021-06-12 20:28:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:13,153 INFO L93 Difference]: Finished difference Result 592 states and 1772 transitions. [2021-06-12 20:28:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:28:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:13,154 INFO L225 Difference]: With dead ends: 592 [2021-06-12 20:28:13,154 INFO L226 Difference]: Without dead ends: 577 [2021-06-12 20:28:13,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2685.9ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:28:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-12 20:28:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 390. [2021-06-12 20:28:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.113110539845758) internal successors, (1211), 389 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1211 transitions. [2021-06-12 20:28:13,158 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1211 transitions. Word has length 20 [2021-06-12 20:28:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:13,158 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1211 transitions. [2021-06-12 20:28:13,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1211 transitions. [2021-06-12 20:28:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:13,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:13,159 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:13,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5182,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:13,359 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash -633183728, now seen corresponding path program 35 times [2021-06-12 20:28:13,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:13,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100758403] [2021-06-12 20:28:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:13,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:13,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100758403] [2021-06-12 20:28:13,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100758403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:13,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455985382] [2021-06-12 20:28:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:13,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:28:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:28:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:13,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:13,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:28:13,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:28:13,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:28:13,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:13,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:28:13,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:28:13,785 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:13,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:13,795 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:13,799 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:28:13,804 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:13,809 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:28:13,814 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:13,819 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:13,824 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:13,828 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:13,833 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:28:13,837 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:13,842 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:13,847 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:13,852 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:13,856 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:28:13,861 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:13,865 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:28:13,870 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:13,874 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:28:13,879 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:28:13,883 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:13,888 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:13,892 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:13,896 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:28:13,900 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:28:13,905 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:13,909 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:28:13,913 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:13,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:13,917 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:14,082 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-12 20:28:14,082 INFO L628 ElimStorePlain]: treesize reduction 373, result has 34.3 percent of original size [2021-06-12 20:28:14,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:28:14,084 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1873, output treesize:195 [2021-06-12 20:28:14,399 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-12 20:28:14,572 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-12 20:28:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:14,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455985382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:14,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:14,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:28:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442649359] [2021-06-12 20:28:14,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:28:14,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:14,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:28:14,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:28:14,768 INFO L87 Difference]: Start difference. First operand 390 states and 1211 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:15,410 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-12 20:28:15,888 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-12 20:28:16,296 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-12 20:28:16,742 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-12 20:28:16,916 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-12 20:28:17,359 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-06-12 20:28:17,603 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-12 20:28:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:17,655 INFO L93 Difference]: Finished difference Result 800 states and 2252 transitions. [2021-06-12 20:28:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:28:17,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:17,657 INFO L225 Difference]: With dead ends: 800 [2021-06-12 20:28:17,657 INFO L226 Difference]: Without dead ends: 728 [2021-06-12 20:28:17,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3225.3ms TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:28:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-12 20:28:17,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 395. [2021-06-12 20:28:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1269035532994924) internal successors, (1232), 394 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1232 transitions. [2021-06-12 20:28:17,662 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1232 transitions. Word has length 20 [2021-06-12 20:28:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:17,662 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1232 transitions. [2021-06-12 20:28:17,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1232 transitions. [2021-06-12 20:28:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:17,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:17,663 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:17,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5333 [2021-06-12 20:28:17,863 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 169929870, now seen corresponding path program 36 times [2021-06-12 20:28:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:17,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946794038] [2021-06-12 20:28:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:18,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:18,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946794038] [2021-06-12 20:28:18,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946794038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:18,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974144200] [2021-06-12 20:28:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:18,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:28:18,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:28:18,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:18,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:18,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:18,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:18,872 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2021-06-12 20:28:18,873 INFO L628 ElimStorePlain]: treesize reduction 203, result has 64.1 percent of original size [2021-06-12 20:28:18,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:18,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:18,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:19,034 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:28:19,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:19,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:19,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:19,188 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:28:19,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:19,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:28:19,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:19,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:19,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:19,438 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-12 20:28:19,439 INFO L628 ElimStorePlain]: treesize reduction 26, result has 91.9 percent of original size [2021-06-12 20:28:19,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 12 [2021-06-12 20:28:19,444 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:19,449 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:19,562 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:28:19,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:19,570 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:19,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:19,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:28:19,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:19,686 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 20:28:19,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:19,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:28:19,691 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:573, output treesize:232 [2021-06-12 20:28:19,889 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-12 20:28:20,119 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-12 20:28:20,422 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 83 [2021-06-12 20:28:20,667 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_745, v_prenex_737, v_prenex_739, array_6, v_prenex_741, v_prenex_743], 1=[v_prenex_736, v_prenex_738, array_3, v_prenex_740, v_prenex_742, v_prenex_744]} [2021-06-12 20:28:20,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:20,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:20,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:20,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:20,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:20,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:20,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:20,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:20,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:20,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:20,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:20,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:21,048 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 87 [2021-06-12 20:28:21,048 INFO L628 ElimStorePlain]: treesize reduction 1086, result has 16.4 percent of original size [2021-06-12 20:28:21,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:21,054 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:21,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:21,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:28:21,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:21,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:21,145 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:21,279 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-12 20:28:21,280 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.1 percent of original size [2021-06-12 20:28:21,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:21,285 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:21,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:21,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:28:21,353 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:21,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:21,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:21,416 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:21,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:21,474 INFO L518 ElimStorePlain]: Eliminatee v_prenex_736 vanished before elimination [2021-06-12 20:28:21,474 INFO L518 ElimStorePlain]: Eliminatee v_prenex_738 vanished before elimination [2021-06-12 20:28:21,474 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:28:21,474 INFO L518 ElimStorePlain]: Eliminatee v_prenex_740 vanished before elimination [2021-06-12 20:28:21,474 INFO L518 ElimStorePlain]: Eliminatee v_prenex_742 vanished before elimination [2021-06-12 20:28:21,474 INFO L518 ElimStorePlain]: Eliminatee v_prenex_744 vanished before elimination [2021-06-12 20:28:21,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:28:21,476 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1495, output treesize:107 [2021-06-12 20:28:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:21,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974144200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:21,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:21,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:28:21,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064176179] [2021-06-12 20:28:21,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:28:21,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:21,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:28:21,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:28:21,610 INFO L87 Difference]: Start difference. First operand 395 states and 1232 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:22,391 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2021-06-12 20:28:22,951 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2021-06-12 20:28:23,813 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 141 [2021-06-12 20:28:24,026 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-12 20:28:24,233 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-06-12 20:28:24,394 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-12 20:28:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:24,413 INFO L93 Difference]: Finished difference Result 616 states and 1820 transitions. [2021-06-12 20:28:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:28:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:24,414 INFO L225 Difference]: With dead ends: 616 [2021-06-12 20:28:24,414 INFO L226 Difference]: Without dead ends: 568 [2021-06-12 20:28:24,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3380.7ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:28:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-12 20:28:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 398. [2021-06-12 20:28:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.123425692695214) internal successors, (1240), 397 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1240 transitions. [2021-06-12 20:28:24,419 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1240 transitions. Word has length 20 [2021-06-12 20:28:24,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:24,419 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1240 transitions. [2021-06-12 20:28:24,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1240 transitions. [2021-06-12 20:28:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:24,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:24,419 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:24,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5385,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:24,620 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash -146181486, now seen corresponding path program 37 times [2021-06-12 20:28:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:24,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91348007] [2021-06-12 20:28:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:24,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91348007] [2021-06-12 20:28:24,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91348007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029478970] [2021-06-12 20:28:24,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:28:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:25,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:25,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:25,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:25,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:25,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:25,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:25,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,695 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-12 20:28:25,696 INFO L628 ElimStorePlain]: treesize reduction 436, result has 41.5 percent of original size [2021-06-12 20:28:25,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:25,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:25,706 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:25,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,829 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-12 20:28:25,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:25,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:25,843 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:25,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:25,848 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:25,852 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:25,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:25,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:28:25,953 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:895, output treesize:199 [2021-06-12 20:28:26,147 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-12 20:28:26,461 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 77 [2021-06-12 20:28:26,642 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_768, v_prenex_770, array_6, v_prenex_760, v_prenex_762, v_prenex_764], 1=[v_prenex_767, v_prenex_769, v_prenex_759, array_3, v_prenex_761, v_prenex_763]} [2021-06-12 20:28:26,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:26,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:26,895 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2021-06-12 20:28:26,895 INFO L628 ElimStorePlain]: treesize reduction 513, result has 31.2 percent of original size [2021-06-12 20:28:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:26,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:26,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:26,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:26,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:27,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:27,082 INFO L518 ElimStorePlain]: Eliminatee v_prenex_760 vanished before elimination [2021-06-12 20:28:27,082 INFO L518 ElimStorePlain]: Eliminatee v_prenex_762 vanished before elimination [2021-06-12 20:28:27,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:27,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:27,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:27,176 INFO L518 ElimStorePlain]: Eliminatee v_prenex_767 vanished before elimination [2021-06-12 20:28:27,176 INFO L518 ElimStorePlain]: Eliminatee v_prenex_769 vanished before elimination [2021-06-12 20:28:27,176 INFO L518 ElimStorePlain]: Eliminatee v_prenex_759 vanished before elimination [2021-06-12 20:28:27,176 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:28:27,177 INFO L518 ElimStorePlain]: Eliminatee v_prenex_761 vanished before elimination [2021-06-12 20:28:27,177 INFO L518 ElimStorePlain]: Eliminatee v_prenex_763 vanished before elimination [2021-06-12 20:28:27,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:28:27,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 18 variables, input treesize:753, output treesize:180 [2021-06-12 20:28:27,319 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-12 20:28:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:27,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029478970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:27,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:27,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:28:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078131983] [2021-06-12 20:28:27,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:28:27,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:28:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:28:27,523 INFO L87 Difference]: Start difference. First operand 398 states and 1240 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:27,989 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-12 20:28:28,255 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 96 [2021-06-12 20:28:28,570 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2021-06-12 20:28:29,115 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 128 [2021-06-12 20:28:29,548 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 134 [2021-06-12 20:28:29,826 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-12 20:28:30,068 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-12 20:28:30,343 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-06-12 20:28:30,640 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-06-12 20:28:31,024 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-06-12 20:28:31,329 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-06-12 20:28:31,476 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-12 20:28:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:31,599 INFO L93 Difference]: Finished difference Result 765 states and 2172 transitions. [2021-06-12 20:28:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:28:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:31,601 INFO L225 Difference]: With dead ends: 765 [2021-06-12 20:28:31,601 INFO L226 Difference]: Without dead ends: 693 [2021-06-12 20:28:31,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 4515.9ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:28:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-12 20:28:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 398. [2021-06-12 20:28:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.123425692695214) internal successors, (1240), 397 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1240 transitions. [2021-06-12 20:28:31,606 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1240 transitions. Word has length 20 [2021-06-12 20:28:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:31,606 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1240 transitions. [2021-06-12 20:28:31,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1240 transitions. [2021-06-12 20:28:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:31,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:31,606 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:31,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5501,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:31,807 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:31,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1265307084, now seen corresponding path program 38 times [2021-06-12 20:28:31,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:31,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207996721] [2021-06-12 20:28:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:31,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207996721] [2021-06-12 20:28:31,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207996721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708457590] [2021-06-12 20:28:31,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:31,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:28:31,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:28:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:32,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:32,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:32,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:32,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:32,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:32,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:32,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:32,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:32,832 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-12 20:28:32,832 INFO L628 ElimStorePlain]: treesize reduction 123, result has 74.8 percent of original size [2021-06-12 20:28:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:32,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:28:32,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:32,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:32,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:28:32,845 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,081 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2021-06-12 20:28:33,082 INFO L628 ElimStorePlain]: treesize reduction 26, result has 91.7 percent of original size [2021-06-12 20:28:33,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:33,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:33,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:33,088 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:33,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,203 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 20:28:33,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:33,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:33,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:33,208 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,320 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:28:33,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:33,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:33,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:33,325 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,431 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:28:33,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:33,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:33,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:33,436 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,541 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 20:28:33,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:33,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:28:33,547 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:573, output treesize:239 [2021-06-12 20:28:33,749 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-12 20:28:33,957 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_790, v_prenex_792, array_6, v_prenex_794, v_prenex_796, v_prenex_798], 1=[v_prenex_789, array_3, v_prenex_791, v_prenex_793, v_prenex_795, v_prenex_797]} [2021-06-12 20:28:33,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:33,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:33,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:33,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:33,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:33,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:33,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:34,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:34,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:34,371 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 86 [2021-06-12 20:28:34,371 INFO L628 ElimStorePlain]: treesize reduction 1337, result has 14.8 percent of original size [2021-06-12 20:28:34,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:28:34,377 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:34,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:34,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:28:34,475 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:34,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:34,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:34,571 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:34,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:28:34,663 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:34,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:34,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:34,755 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:34,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:34,837 INFO L518 ElimStorePlain]: Eliminatee v_prenex_789 vanished before elimination [2021-06-12 20:28:34,837 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:28:34,837 INFO L518 ElimStorePlain]: Eliminatee v_prenex_791 vanished before elimination [2021-06-12 20:28:34,837 INFO L518 ElimStorePlain]: Eliminatee v_prenex_793 vanished before elimination [2021-06-12 20:28:34,837 INFO L518 ElimStorePlain]: Eliminatee v_prenex_795 vanished before elimination [2021-06-12 20:28:34,837 INFO L518 ElimStorePlain]: Eliminatee v_prenex_797 vanished before elimination [2021-06-12 20:28:34,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:28:34,840 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1685, output treesize:144 [2021-06-12 20:28:34,980 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:28:35,177 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-12 20:28:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708457590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:35,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:35,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:28:35,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398764220] [2021-06-12 20:28:35,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:28:35,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:28:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:28:35,381 INFO L87 Difference]: Start difference. First operand 398 states and 1240 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:35,815 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-12 20:28:36,143 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 122 [2021-06-12 20:28:36,487 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-12 20:28:36,864 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-06-12 20:28:37,189 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-12 20:28:37,714 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 93 [2021-06-12 20:28:38,134 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-06-12 20:28:38,756 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 101 [2021-06-12 20:28:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:38,822 INFO L93 Difference]: Finished difference Result 781 states and 2250 transitions. [2021-06-12 20:28:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:28:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:38,824 INFO L225 Difference]: With dead ends: 781 [2021-06-12 20:28:38,824 INFO L226 Difference]: Without dead ends: 739 [2021-06-12 20:28:38,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3863.2ms TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:28:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-12 20:28:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 401. [2021-06-12 20:28:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.1375) internal successors, (1255), 400 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1255 transitions. [2021-06-12 20:28:38,829 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1255 transitions. Word has length 20 [2021-06-12 20:28:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:38,829 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1255 transitions. [2021-06-12 20:28:38,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1255 transitions. [2021-06-12 20:28:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:38,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:38,829 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:39,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5669 [2021-06-12 20:28:39,030 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:39,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2040599664, now seen corresponding path program 39 times [2021-06-12 20:28:39,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:39,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410007942] [2021-06-12 20:28:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:39,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:39,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410007942] [2021-06-12 20:28:39,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410007942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:39,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850303744] [2021-06-12 20:28:39,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:39,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:28:39,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:39,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:28:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:39,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:39,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:39,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:39,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:39,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:39,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:39,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:39,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:39,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:39,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:39,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:40,080 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2021-06-12 20:28:40,080 INFO L628 ElimStorePlain]: treesize reduction 167, result has 69.3 percent of original size [2021-06-12 20:28:40,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:40,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:40,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:40,092 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:40,233 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:28:40,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:40,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:40,240 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:40,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:28:40,246 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:40,477 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-06-12 20:28:40,478 INFO L628 ElimStorePlain]: treesize reduction 35, result has 88.6 percent of original size [2021-06-12 20:28:40,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:40,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:40,592 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:28:40,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:40,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:40,597 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:40,703 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:28:40,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:40,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:40,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:40,708 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:40,811 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 20:28:40,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:40,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:28:40,817 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:573, output treesize:239 [2021-06-12 20:28:41,018 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-12 20:28:41,216 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_813, v_prenex_815, v_prenex_817, v_prenex_819, array_6, v_prenex_821], 1=[v_prenex_812, v_prenex_814, array_3, v_prenex_816, v_prenex_818, v_prenex_820]} [2021-06-12 20:28:41,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:41,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:41,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:41,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:41,257 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:41,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:41,273 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,647 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 88 [2021-06-12 20:28:41,648 INFO L628 ElimStorePlain]: treesize reduction 1334, result has 15.2 percent of original size [2021-06-12 20:28:41,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:41,653 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:41,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:28:41,757 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:41,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:41,853 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:41,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:41,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:28:41,946 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:42,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:42,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:28:42,035 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:42,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:42,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_812 vanished before elimination [2021-06-12 20:28:42,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_814 vanished before elimination [2021-06-12 20:28:42,117 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:28:42,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_816 vanished before elimination [2021-06-12 20:28:42,118 INFO L518 ElimStorePlain]: Eliminatee v_prenex_818 vanished before elimination [2021-06-12 20:28:42,118 INFO L518 ElimStorePlain]: Eliminatee v_prenex_820 vanished before elimination [2021-06-12 20:28:42,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:28:42,120 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1685, output treesize:144 [2021-06-12 20:28:42,260 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:28:42,405 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-06-12 20:28:42,578 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-12 20:28:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:42,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850303744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:42,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:42,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:28:42,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014374860] [2021-06-12 20:28:42,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:28:42,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:28:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:28:42,653 INFO L87 Difference]: Start difference. First operand 401 states and 1255 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:43,108 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-12 20:28:43,498 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 139 [2021-06-12 20:28:43,825 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-06-12 20:28:44,278 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-06-12 20:28:44,491 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-12 20:28:45,037 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 102 [2021-06-12 20:28:45,394 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-12 20:28:45,974 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 105 [2021-06-12 20:28:46,412 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-06-12 20:28:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:46,445 INFO L93 Difference]: Finished difference Result 756 states and 2203 transitions. [2021-06-12 20:28:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:28:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:46,446 INFO L225 Difference]: With dead ends: 756 [2021-06-12 20:28:46,446 INFO L226 Difference]: Without dead ends: 699 [2021-06-12 20:28:46,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4300.3ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:28:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-12 20:28:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 399. [2021-06-12 20:28:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.130653266331658) internal successors, (1246), 398 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1246 transitions. [2021-06-12 20:28:46,451 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1246 transitions. Word has length 20 [2021-06-12 20:28:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:46,451 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1246 transitions. [2021-06-12 20:28:46,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1246 transitions. [2021-06-12 20:28:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:46,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:46,452 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:46,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5821,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:46,652 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:46,652 INFO L82 PathProgramCache]: Analyzing trace with hash -322665892, now seen corresponding path program 40 times [2021-06-12 20:28:46,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:46,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158707844] [2021-06-12 20:28:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:46,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:46,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158707844] [2021-06-12 20:28:46,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158707844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:46,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735460900] [2021-06-12 20:28:46,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:46,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:28:46,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:46,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:28:46,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:47,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:47,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:47,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:47,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:47,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:47,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:47,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:47,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:47,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:47,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:47,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:47,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:47,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,141 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-06-12 20:28:48,142 INFO L628 ElimStorePlain]: treesize reduction 569, result has 44.4 percent of original size [2021-06-12 20:28:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:48,148 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:48,154 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:48,169 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,484 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-12 20:28:48,484 INFO L628 ElimStorePlain]: treesize reduction 31, result has 92.7 percent of original size [2021-06-12 20:28:48,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:48,491 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:48,495 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:48,501 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,632 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 20:28:48,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:48,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:48,638 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:48,643 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:48,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:48,648 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:48,773 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 20:28:48,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:48,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:28:48,781 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1129, output treesize:279 [2021-06-12 20:28:49,007 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-12 20:28:49,405 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_837, v_prenex_839, array_6, v_prenex_852, v_prenex_841, v_prenex_843], 1=[v_prenex_836, array_3, v_prenex_848, v_prenex_838, v_prenex_840, v_prenex_842]} [2021-06-12 20:28:49,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:49,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:49,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:49,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:49,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:49,638 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2021-06-12 20:28:49,638 INFO L628 ElimStorePlain]: treesize reduction 431, result has 33.1 percent of original size [2021-06-12 20:28:49,638 INFO L518 ElimStorePlain]: Eliminatee v_prenex_839 vanished before elimination [2021-06-12 20:28:49,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:28:49,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:49,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:49,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:49,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:49,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:49,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:49,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:49,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:49,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:28:49,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:49,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:49,940 INFO L518 ElimStorePlain]: Eliminatee v_prenex_836 vanished before elimination [2021-06-12 20:28:49,940 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:28:49,940 INFO L518 ElimStorePlain]: Eliminatee v_prenex_848 vanished before elimination [2021-06-12 20:28:49,940 INFO L518 ElimStorePlain]: Eliminatee v_prenex_838 vanished before elimination [2021-06-12 20:28:49,940 INFO L518 ElimStorePlain]: Eliminatee v_prenex_840 vanished before elimination [2021-06-12 20:28:49,940 INFO L518 ElimStorePlain]: Eliminatee v_prenex_842 vanished before elimination [2021-06-12 20:28:49,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:28:49,943 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 18 variables, input treesize:673, output treesize:145 [2021-06-12 20:28:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:50,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735460900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:50,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:50,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:28:50,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19490518] [2021-06-12 20:28:50,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:28:50,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:50,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:28:50,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:28:50,131 INFO L87 Difference]: Start difference. First operand 399 states and 1246 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:50,875 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 101 [2021-06-12 20:28:51,238 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-06-12 20:28:51,609 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 128 [2021-06-12 20:28:51,903 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 116 [2021-06-12 20:28:52,095 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-12 20:28:52,326 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-12 20:28:52,574 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-12 20:28:52,858 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-12 20:28:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:52,906 INFO L93 Difference]: Finished difference Result 621 states and 1855 transitions. [2021-06-12 20:28:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:28:52,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:52,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:52,907 INFO L225 Difference]: With dead ends: 621 [2021-06-12 20:28:52,907 INFO L226 Difference]: Without dead ends: 591 [2021-06-12 20:28:52,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3253.3ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:28:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-12 20:28:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 402. [2021-06-12 20:28:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1271820448877805) internal successors, (1254), 401 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1254 transitions. [2021-06-12 20:28:52,914 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1254 transitions. Word has length 20 [2021-06-12 20:28:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:52,914 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1254 transitions. [2021-06-12 20:28:52,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1254 transitions. [2021-06-12 20:28:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:52,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:52,915 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:53,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5949,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:53,115 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash -638777248, now seen corresponding path program 41 times [2021-06-12 20:28:53,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:53,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889920426] [2021-06-12 20:28:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:53,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:53,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889920426] [2021-06-12 20:28:53,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889920426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:53,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327023060] [2021-06-12 20:28:53,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:53,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:28:53,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:28:53,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:53,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:53,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:28:53,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:53,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:53,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:53,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:53,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:53,604 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:53,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:53,612 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:53,617 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 20:28:53,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:53,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:53,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:28:53,630 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:53,635 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:53,639 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:28:53,644 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:53,648 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:53,652 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:53,657 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:53,661 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:53,666 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:28:53,670 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:28:53,674 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:28:53,678 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:53,832 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-12 20:28:53,832 INFO L628 ElimStorePlain]: treesize reduction 293, result has 38.7 percent of original size [2021-06-12 20:28:53,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:28:53,833 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:967, output treesize:185 [2021-06-12 20:28:54,258 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-12 20:28:54,412 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-12 20:28:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:54,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327023060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:54,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:54,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:28:54,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494518897] [2021-06-12 20:28:54,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:28:54,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:54,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:28:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:28:54,484 INFO L87 Difference]: Start difference. First operand 402 states and 1254 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:55,258 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-12 20:28:55,538 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-06-12 20:28:55,861 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-06-12 20:28:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:28:55,897 INFO L93 Difference]: Finished difference Result 621 states and 1849 transitions. [2021-06-12 20:28:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:28:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:28:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:28:55,898 INFO L225 Difference]: With dead ends: 621 [2021-06-12 20:28:55,898 INFO L226 Difference]: Without dead ends: 606 [2021-06-12 20:28:55,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1883.5ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:28:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-12 20:28:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 402. [2021-06-12 20:28:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1271820448877805) internal successors, (1254), 401 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1254 transitions. [2021-06-12 20:28:55,903 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1254 transitions. Word has length 20 [2021-06-12 20:28:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:28:55,903 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1254 transitions. [2021-06-12 20:28:55,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1254 transitions. [2021-06-12 20:28:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:28:55,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:28:55,903 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:28:56,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6154 [2021-06-12 20:28:56,104 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:28:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:28:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1957469660, now seen corresponding path program 42 times [2021-06-12 20:28:56,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:28:56,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631607156] [2021-06-12 20:28:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:28:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:28:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:56,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:28:56,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631607156] [2021-06-12 20:28:56,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631607156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:56,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103497613] [2021-06-12 20:28:56,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:28:56,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:28:56,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:28:56,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:28:56,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:28:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:56,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:56,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:56,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:56,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:56,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:56,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:56,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:56,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:28:56,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:57,101 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-12 20:28:57,101 INFO L628 ElimStorePlain]: treesize reduction 158, result has 69.1 percent of original size [2021-06-12 20:28:57,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:28:57,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:57,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:57,224 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:28:57,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:57,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:28:57,230 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:57,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:57,236 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:57,416 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-12 20:28:57,417 INFO L628 ElimStorePlain]: treesize reduction 22, result has 92.0 percent of original size [2021-06-12 20:28:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:28:57,422 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:57,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:57,518 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:57,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:57,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:28:57,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:28:57,608 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:28:57,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:28:57,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:28:57,696 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:541, output treesize:219 [2021-06-12 20:28:57,869 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-06-12 20:28:58,446 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-12 20:28:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:28:58,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103497613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:28:58,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:28:58,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:28:58,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611489222] [2021-06-12 20:28:58,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:28:58,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:28:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:28:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:28:58,647 INFO L87 Difference]: Start difference. First operand 402 states and 1254 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:28:59,290 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-12 20:28:59,624 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 132 [2021-06-12 20:29:00,032 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-06-12 20:29:00,393 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2021-06-12 20:29:00,672 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-12 20:29:00,888 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-12 20:29:01,297 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-06-12 20:29:01,539 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-06-12 20:29:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:01,578 INFO L93 Difference]: Finished difference Result 691 states and 2016 transitions. [2021-06-12 20:29:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:29:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:01,579 INFO L225 Difference]: With dead ends: 691 [2021-06-12 20:29:01,579 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:29:01,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3293.8ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:29:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:29:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 402. [2021-06-12 20:29:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1271820448877805) internal successors, (1254), 401 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1254 transitions. [2021-06-12 20:29:01,584 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1254 transitions. Word has length 20 [2021-06-12 20:29:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:01,584 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1254 transitions. [2021-06-12 20:29:01,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1254 transitions. [2021-06-12 20:29:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:01,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:01,585 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:01,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6216,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:01,785 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:01,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:01,786 INFO L82 PathProgramCache]: Analyzing trace with hash 266313232, now seen corresponding path program 43 times [2021-06-12 20:29:01,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:01,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811344253] [2021-06-12 20:29:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:01,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:01,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811344253] [2021-06-12 20:29:01,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811344253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:01,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204235990] [2021-06-12 20:29:01,924 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 [2021-06-12 20:29:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:29:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:02,366 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-06-12 20:29:02,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:02,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:02,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:02,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:02,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:02,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:02,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:02,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:02,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:02,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:02,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,207 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-06-12 20:29:03,207 INFO L628 ElimStorePlain]: treesize reduction 586, result has 43.8 percent of original size [2021-06-12 20:29:03,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:03,213 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:29:03,219 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:03,224 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,384 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 20:29:03,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:03,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:29:03,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:03,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:03,401 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,673 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-12 20:29:03,673 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.8 percent of original size [2021-06-12 20:29:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:03,679 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:03,684 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:03,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:03,689 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:03,819 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 20:29:03,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:03,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:29:03,827 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:327 [2021-06-12 20:29:04,049 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 94 [2021-06-12 20:29:04,301 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_888, array_6, v_prenex_884, v_prenex_886], 1=[array_0, v_prenex_883, v_prenex_885, v_prenex_887]} [2021-06-12 20:29:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:04,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:04,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:04,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:29:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:04,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:04,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:04,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:04,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:29:04,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:04,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:04,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:04,606 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-06-12 20:29:04,607 INFO L628 ElimStorePlain]: treesize reduction 867, result has 19.0 percent of original size [2021-06-12 20:29:04,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:04,611 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:04,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:04,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:04,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:04,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:04,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:04,771 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:04,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:04,842 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:29:04,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_883 vanished before elimination [2021-06-12 20:29:04,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_885 vanished before elimination [2021-06-12 20:29:04,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_887 vanished before elimination [2021-06-12 20:29:04,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:29:04,844 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1193, output treesize:143 [2021-06-12 20:29:04,979 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 20:29:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:05,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204235990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:05,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:29:05,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:29:05,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587798853] [2021-06-12 20:29:05,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:29:05,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:29:05,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:29:05,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:29:05,137 INFO L87 Difference]: Start difference. First operand 402 states and 1254 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:05,894 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-12 20:29:06,300 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 141 [2021-06-12 20:29:06,553 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-12 20:29:06,958 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-06-12 20:29:07,183 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-12 20:29:07,458 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-06-12 20:29:07,880 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-06-12 20:29:08,251 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-06-12 20:29:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:08,311 INFO L93 Difference]: Finished difference Result 710 states and 2068 transitions. [2021-06-12 20:29:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:29:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:08,312 INFO L225 Difference]: With dead ends: 710 [2021-06-12 20:29:08,312 INFO L226 Difference]: Without dead ends: 638 [2021-06-12 20:29:08,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3587.8ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:29:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-12 20:29:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 402. [2021-06-12 20:29:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1271820448877805) internal successors, (1254), 401 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1254 transitions. [2021-06-12 20:29:08,317 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1254 transitions. Word has length 20 [2021-06-12 20:29:08,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:08,317 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1254 transitions. [2021-06-12 20:29:08,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:08,317 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1254 transitions. [2021-06-12 20:29:08,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:08,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:08,318 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:08,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6411 [2021-06-12 20:29:08,533 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:08,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:08,534 INFO L82 PathProgramCache]: Analyzing trace with hash -917231582, now seen corresponding path program 44 times [2021-06-12 20:29:08,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:08,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443825074] [2021-06-12 20:29:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:08,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:08,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443825074] [2021-06-12 20:29:08,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443825074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:08,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162864482] [2021-06-12 20:29:08,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:08,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:29:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:29:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:29:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:09,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:09,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:09,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:09,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:09,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:09,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,624 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-12 20:29:09,625 INFO L628 ElimStorePlain]: treesize reduction 419, result has 46.2 percent of original size [2021-06-12 20:29:09,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:09,630 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:09,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:29:09,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,912 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 20:29:09,912 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:29:09,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:09,918 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:09,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:09,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:09,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:09,928 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:10,056 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-12 20:29:10,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:10,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:29:10,063 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:1003, output treesize:276 [2021-06-12 20:29:10,215 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 20:29:10,411 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_899, v_prenex_911, v_prenex_901, v_prenex_913, v_prenex_925, v_prenex_903, v_prenex_915, v_prenex_905, v_prenex_917, v_prenex_907, array_6, v_prenex_909], 1=[v_prenex_910, v_prenex_900, v_prenex_912, array_0, v_prenex_902, v_prenex_914, v_prenex_904, v_prenex_916, v_prenex_906, v_prenex_918, v_prenex_908, v_prenex_898]} [2021-06-12 20:29:10,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:10,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:10,856 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 92 [2021-06-12 20:29:10,857 INFO L628 ElimStorePlain]: treesize reduction 1050, result has 22.2 percent of original size [2021-06-12 20:29:10,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:10,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:10,989 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:29:10,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:10,990 INFO L518 ElimStorePlain]: Eliminatee v_prenex_901 vanished before elimination [2021-06-12 20:29:10,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:10,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:11,119 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:29:11,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:11,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_925 vanished before elimination [2021-06-12 20:29:11,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_903 vanished before elimination [2021-06-12 20:29:11,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:11,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:11,246 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:29:11,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:11,246 INFO L518 ElimStorePlain]: Eliminatee v_prenex_905 vanished before elimination [2021-06-12 20:29:11,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:11,252 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:11,370 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 20:29:11,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:11,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_907 vanished before elimination [2021-06-12 20:29:11,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:11,375 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:11,496 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 20:29:11,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:11,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:29:11,501 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:11,617 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-12 20:29:11,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_910 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_900 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_912 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_914 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_904 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_916 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_906 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_918 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_908 vanished before elimination [2021-06-12 20:29:11,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_898 vanished before elimination [2021-06-12 20:29:11,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 20:29:11,621 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 36 variables, input treesize:1357, output treesize:220 [2021-06-12 20:29:11,930 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-12 20:29:12,079 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-12 20:29:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:12,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162864482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:12,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:29:12,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:29:12,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004105857] [2021-06-12 20:29:12,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:29:12,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:29:12,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:29:12,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:29:12,196 INFO L87 Difference]: Start difference. First operand 402 states and 1254 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:12,845 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-12 20:29:13,276 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 120 [2021-06-12 20:29:13,520 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-12 20:29:13,985 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2021-06-12 20:29:14,527 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2021-06-12 20:29:15,129 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 89 [2021-06-12 20:29:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:15,155 INFO L93 Difference]: Finished difference Result 676 states and 1993 transitions. [2021-06-12 20:29:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:29:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:15,156 INFO L225 Difference]: With dead ends: 676 [2021-06-12 20:29:15,156 INFO L226 Difference]: Without dead ends: 661 [2021-06-12 20:29:15,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3483.3ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:29:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-12 20:29:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 404. [2021-06-12 20:29:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.138957816377171) internal successors, (1265), 403 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1265 transitions. [2021-06-12 20:29:15,161 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1265 transitions. Word has length 20 [2021-06-12 20:29:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:15,161 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1265 transitions. [2021-06-12 20:29:15,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1265 transitions. [2021-06-12 20:29:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:15,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:15,161 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:15,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6635,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:15,362 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2135866942, now seen corresponding path program 45 times [2021-06-12 20:29:15,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:15,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876970034] [2021-06-12 20:29:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:15,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:15,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876970034] [2021-06-12 20:29:15,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876970034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:15,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288082185] [2021-06-12 20:29:15,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:15,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:29:15,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:29:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:29:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:16,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:16,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:16,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:16,447 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 114 [2021-06-12 20:29:16,447 INFO L628 ElimStorePlain]: treesize reduction 197, result has 68.5 percent of original size [2021-06-12 20:29:16,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:16,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:16,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:16,634 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 20:29:16,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:16,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:16,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:16,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:16,820 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 20:29:16,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:16,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:16,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:16,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:16,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:16,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,002 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:29:17,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:17,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:17,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:17,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:29:17,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,287 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-06-12 20:29:17,287 INFO L628 ElimStorePlain]: treesize reduction 42, result has 87.8 percent of original size [2021-06-12 20:29:17,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:17,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:17,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:17,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:17,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:17,298 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,423 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:29:17,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:17,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:29:17,430 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:633, output treesize:283 [2021-06-12 20:29:17,649 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2021-06-12 20:29:17,864 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_944, v_prenex_946, v_prenex_948, array_6, v_prenex_940, v_prenex_942], 1=[v_prenex_943, v_prenex_945, array_0, v_prenex_947, v_prenex_939, v_prenex_941]} [2021-06-12 20:29:17,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:17,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:17,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:29:17,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:17,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:29:17,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:17,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:17,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:18,341 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 98 [2021-06-12 20:29:18,342 INFO L628 ElimStorePlain]: treesize reduction 1448, result has 15.1 percent of original size [2021-06-12 20:29:18,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:18,348 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:18,461 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 20:29:18,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:18,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:18,467 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:18,574 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 20:29:18,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:18,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:18,580 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:18,681 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:29:18,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:18,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:18,686 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:18,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:18,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:29:18,790 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:18,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:18,886 INFO L518 ElimStorePlain]: Eliminatee v_prenex_943 vanished before elimination [2021-06-12 20:29:18,886 INFO L518 ElimStorePlain]: Eliminatee v_prenex_945 vanished before elimination [2021-06-12 20:29:18,886 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:29:18,886 INFO L518 ElimStorePlain]: Eliminatee v_prenex_947 vanished before elimination [2021-06-12 20:29:18,886 INFO L518 ElimStorePlain]: Eliminatee v_prenex_939 vanished before elimination [2021-06-12 20:29:18,886 INFO L518 ElimStorePlain]: Eliminatee v_prenex_941 vanished before elimination [2021-06-12 20:29:18,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:29:18,889 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1859, output treesize:194 [2021-06-12 20:29:19,056 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:29:19,299 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-06-12 20:29:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:19,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288082185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:19,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:29:19,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:29:19,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455359970] [2021-06-12 20:29:19,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:29:19,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:29:19,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:29:19,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:29:19,387 INFO L87 Difference]: Start difference. First operand 404 states and 1265 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:19,843 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-12 20:29:20,241 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2021-06-12 20:29:20,541 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-12 20:29:20,982 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2021-06-12 20:29:21,416 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-06-12 20:29:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:21,449 INFO L93 Difference]: Finished difference Result 703 states and 2083 transitions. [2021-06-12 20:29:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:29:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:21,450 INFO L225 Difference]: With dead ends: 703 [2021-06-12 20:29:21,450 INFO L226 Difference]: Without dead ends: 688 [2021-06-12 20:29:21,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2594.0ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:29:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-12 20:29:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 407. [2021-06-12 20:29:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1527093596059115) internal successors, (1280), 406 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1280 transitions. [2021-06-12 20:29:21,455 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1280 transitions. Word has length 20 [2021-06-12 20:29:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:21,455 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1280 transitions. [2021-06-12 20:29:21,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1280 transitions. [2021-06-12 20:29:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:21,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:21,456 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:21,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6767,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:21,656 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:21,656 INFO L82 PathProgramCache]: Analyzing trace with hash 71828966, now seen corresponding path program 46 times [2021-06-12 20:29:21,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:21,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658986495] [2021-06-12 20:29:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:21,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:21,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658986495] [2021-06-12 20:29:21,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658986495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:21,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493057010] [2021-06-12 20:29:21,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:21,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:29:21,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:29:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:29:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:22,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:22,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:22,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:22,708 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 104 [2021-06-12 20:29:22,709 INFO L628 ElimStorePlain]: treesize reduction 209, result has 64.6 percent of original size [2021-06-12 20:29:22,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:22,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:22,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:22,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:22,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:22,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:29:22,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:22,866 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:29:22,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:22,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:22,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:22,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:22,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:22,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:22,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:29:22,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,014 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 20:29:23,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:23,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:23,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:23,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:23,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:23,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,133 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:29:23,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:23,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:23,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:23,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,245 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 20:29:23,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:23,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:23,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:23,251 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,354 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 20:29:23,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:23,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:29:23,360 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:597, output treesize:242 [2021-06-12 20:29:23,558 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-06-12 20:29:23,802 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_965, v_prenex_967, v_prenex_969, array_6, v_prenex_971, v_prenex_963], 1=[v_prenex_966, v_prenex_968, array_0, v_prenex_970, v_prenex_962, v_prenex_964]} [2021-06-12 20:29:23,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:23,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:23,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:23,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:23,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:23,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:23,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:23,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:24,247 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 95 [2021-06-12 20:29:24,248 INFO L628 ElimStorePlain]: treesize reduction 1299, result has 17.5 percent of original size [2021-06-12 20:29:24,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:29:24,253 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:24,368 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 20:29:24,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:24,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:24,374 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:24,482 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:29:24,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:24,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:24,488 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:24,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:24,492 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:24,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:24,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:24,586 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:24,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:24,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:24,680 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:24,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:24,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_966 vanished before elimination [2021-06-12 20:29:24,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_968 vanished before elimination [2021-06-12 20:29:24,763 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:29:24,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_970 vanished before elimination [2021-06-12 20:29:24,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_962 vanished before elimination [2021-06-12 20:29:24,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_964 vanished before elimination [2021-06-12 20:29:24,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:29:24,766 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1703, output treesize:140 [2021-06-12 20:29:24,903 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:29:25,163 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-12 20:29:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:25,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493057010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:25,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:29:25,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:29:25,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214949663] [2021-06-12 20:29:25,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:29:25,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:29:25,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:29:25,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:29:25,321 INFO L87 Difference]: Start difference. First operand 407 states and 1280 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:25,769 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-12 20:29:26,156 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 129 [2021-06-12 20:29:26,407 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-12 20:29:26,774 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 20:29:27,228 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-06-12 20:29:27,717 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-12 20:29:28,173 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2021-06-12 20:29:28,652 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2021-06-12 20:29:29,192 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2021-06-12 20:29:29,695 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 97 [2021-06-12 20:29:29,841 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-12 20:29:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:29,900 INFO L93 Difference]: Finished difference Result 960 states and 2717 transitions. [2021-06-12 20:29:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:29:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:29,901 INFO L225 Difference]: With dead ends: 960 [2021-06-12 20:29:29,901 INFO L226 Difference]: Without dead ends: 888 [2021-06-12 20:29:29,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 5043.1ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:29:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-06-12 20:29:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 408. [2021-06-12 20:29:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.152334152334152) internal successors, (1283), 407 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1283 transitions. [2021-06-12 20:29:29,907 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1283 transitions. Word has length 20 [2021-06-12 20:29:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:29,907 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1283 transitions. [2021-06-12 20:29:29,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1283 transitions. [2021-06-12 20:29:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:29,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:29,908 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:30,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6895,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:30,108 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1115297082, now seen corresponding path program 47 times [2021-06-12 20:29:30,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:30,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874937410] [2021-06-12 20:29:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:30,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:30,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874937410] [2021-06-12 20:29:30,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874937410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:30,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577094073] [2021-06-12 20:29:30,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:30,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:29:30,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:29:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:29:30,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:30,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:29:30,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:30,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:30,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:30,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:30,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:30,490 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:30,495 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:29:30,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:30,505 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:30,510 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:29:30,515 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:30,519 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:30,524 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:30,529 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:30,533 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:30,538 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:30,542 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:29:30,547 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:29:30,552 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:30,557 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:30,561 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:30,565 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:29:30,570 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:29:30,574 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:29:30,579 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:29:30,584 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:29:30,596 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:30,600 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:30,605 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:30,609 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:30,613 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:29:30,617 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:29:30,622 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:29:30,625 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:29:30,630 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:29:30,634 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:30,820 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-06-12 20:29:30,821 INFO L628 ElimStorePlain]: treesize reduction 413, result has 33.7 percent of original size [2021-06-12 20:29:30,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:29:30,823 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1981, output treesize:210 [2021-06-12 20:29:31,145 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-12 20:29:31,386 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-12 20:29:31,530 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 20:29:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577094073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:31,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:29:31,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:29:31,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387488463] [2021-06-12 20:29:31,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:29:31,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:29:31,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:29:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:29:31,630 INFO L87 Difference]: Start difference. First operand 408 states and 1283 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:32,279 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-06-12 20:29:32,560 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-12 20:29:33,077 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-06-12 20:29:33,219 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-12 20:29:33,608 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-12 20:29:33,988 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-06-12 20:29:34,133 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-12 20:29:34,599 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 97 [2021-06-12 20:29:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:34,639 INFO L93 Difference]: Finished difference Result 831 states and 2371 transitions. [2021-06-12 20:29:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:29:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:34,640 INFO L225 Difference]: With dead ends: 831 [2021-06-12 20:29:34,640 INFO L226 Difference]: Without dead ends: 801 [2021-06-12 20:29:34,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3493.8ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:29:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-06-12 20:29:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 406. [2021-06-12 20:29:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1382716049382715) internal successors, (1271), 405 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1271 transitions. [2021-06-12 20:29:34,645 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1271 transitions. Word has length 20 [2021-06-12 20:29:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:34,645 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1271 transitions. [2021-06-12 20:29:34,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1271 transitions. [2021-06-12 20:29:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:34,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:34,646 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:34,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7064 [2021-06-12 20:29:34,846 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:34,847 INFO L82 PathProgramCache]: Analyzing trace with hash -82608552, now seen corresponding path program 48 times [2021-06-12 20:29:34,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:34,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997481705] [2021-06-12 20:29:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:35,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:35,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997481705] [2021-06-12 20:29:35,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997481705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:35,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155853927] [2021-06-12 20:29:35,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:35,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:29:35,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:29:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:29:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:35,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:35,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:35,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:35,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:35,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:35,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:35,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:35,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:35,622 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:35,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:35,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:35,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:35,999 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-06-12 20:29:35,999 INFO L628 ElimStorePlain]: treesize reduction 496, result has 44.3 percent of original size [2021-06-12 20:29:36,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:36,005 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:36,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:36,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:29:36,016 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:36,317 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 20:29:36,317 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:29:36,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:29:36,323 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:36,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:36,329 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:36,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:36,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:36,333 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:36,585 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-12 20:29:36,585 INFO L628 ElimStorePlain]: treesize reduction 33, result has 89.5 percent of original size [2021-06-12 20:29:36,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:29:36,592 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:1003, output treesize:275 [2021-06-12 20:29:36,810 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-06-12 20:29:37,228 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 102 [2021-06-12 20:29:37,451 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_999, v_prenex_991, v_prenex_1001, array_6, v_prenex_993, v_prenex_995, v_prenex_997], 1=[v_prenex_998, array_0, v_prenex_1000, v_prenex_990, v_prenex_992, v_prenex_994, v_prenex_996]} [2021-06-12 20:29:37,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:29:37,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:37,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:29:37,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:37,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:29:37,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:37,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:29:37,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:37,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:29:37,504 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:37,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:29:37,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:38,004 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 106 [2021-06-12 20:29:38,005 INFO L628 ElimStorePlain]: treesize reduction 1613, result has 16.2 percent of original size [2021-06-12 20:29:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:38,011 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:38,137 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 20:29:38,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:38,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:38,143 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:38,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:38,148 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:38,252 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-12 20:29:38,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:38,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:38,258 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:38,359 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:29:38,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:38,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:38,365 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:38,468 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:29:38,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:38,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:38,474 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:38,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:38,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:38,577 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:38,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:38,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_998 vanished before elimination [2021-06-12 20:29:38,671 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:29:38,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1000 vanished before elimination [2021-06-12 20:29:38,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_990 vanished before elimination [2021-06-12 20:29:38,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_992 vanished before elimination [2021-06-12 20:29:38,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_994 vanished before elimination [2021-06-12 20:29:38,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_996 vanished before elimination [2021-06-12 20:29:38,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:29:38,673 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 21 variables, input treesize:2043, output treesize:175 [2021-06-12 20:29:38,835 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:29:38,994 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:29:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:39,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155853927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:39,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:29:39,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:29:39,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039340219] [2021-06-12 20:29:39,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:29:39,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:29:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:29:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:29:39,086 INFO L87 Difference]: Start difference. First operand 406 states and 1271 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:39,570 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-06-12 20:29:40,003 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 138 [2021-06-12 20:29:40,674 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 182 [2021-06-12 20:29:41,098 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2021-06-12 20:29:41,282 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-12 20:29:41,576 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-12 20:29:41,813 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-12 20:29:42,113 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2021-06-12 20:29:42,581 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-06-12 20:29:42,725 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 20:29:42,987 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-12 20:29:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:43,049 INFO L93 Difference]: Finished difference Result 749 states and 2178 transitions. [2021-06-12 20:29:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:29:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:43,050 INFO L225 Difference]: With dead ends: 749 [2021-06-12 20:29:43,050 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:29:43,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4628.3ms TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:29:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:29:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 406. [2021-06-12 20:29:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1382716049382715) internal successors, (1271), 405 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1271 transitions. [2021-06-12 20:29:43,055 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1271 transitions. Word has length 20 [2021-06-12 20:29:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:43,055 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1271 transitions. [2021-06-12 20:29:43,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1271 transitions. [2021-06-12 20:29:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:43,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:43,055 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:43,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7109,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:43,256 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 213400338, now seen corresponding path program 49 times [2021-06-12 20:29:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:43,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148592945] [2021-06-12 20:29:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:43,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:43,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148592945] [2021-06-12 20:29:43,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148592945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:43,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618138259] [2021-06-12 20:29:43,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:29:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:44,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:44,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:44,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:44,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:44,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:44,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:44,059 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,398 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-06-12 20:29:44,399 INFO L628 ElimStorePlain]: treesize reduction 446, result has 45.7 percent of original size [2021-06-12 20:29:44,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:44,405 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:44,410 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:29:44,415 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,677 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 20:29:44,677 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:29:44,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:44,683 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:44,688 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:44,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:44,692 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:44,817 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-12 20:29:44,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:44,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:29:44,823 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:1003, output treesize:282 [2021-06-12 20:29:45,043 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2021-06-12 20:29:45,296 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2021-06-12 20:29:45,555 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1020, v_prenex_1012, array_6, v_prenex_1014, v_prenex_1016, v_prenex_1018], 1=[array_0, v_prenex_1011, v_prenex_1013, v_prenex_1015, v_prenex_1017, v_prenex_1019]} [2021-06-12 20:29:45,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:29:45,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:45,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:45,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:45,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:45,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:45,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:45,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:45,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:45,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:45,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:29:45,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:46,081 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 102 [2021-06-12 20:29:46,082 INFO L628 ElimStorePlain]: treesize reduction 1440, result has 17.4 percent of original size [2021-06-12 20:29:46,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:46,088 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:46,212 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-12 20:29:46,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:46,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:29:46,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:46,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:46,223 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:46,326 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:29:46,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:46,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:29:46,332 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:46,433 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:29:46,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:46,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:46,438 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:46,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:46,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:46,540 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:46,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:46,634 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:29:46,634 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1011 vanished before elimination [2021-06-12 20:29:46,634 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1013 vanished before elimination [2021-06-12 20:29:46,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1015 vanished before elimination [2021-06-12 20:29:46,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1017 vanished before elimination [2021-06-12 20:29:46,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1019 vanished before elimination [2021-06-12 20:29:46,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:29:46,638 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1893, output treesize:198 [2021-06-12 20:29:46,811 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:29:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:47,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618138259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:47,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:29:47,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:29:47,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121228636] [2021-06-12 20:29:47,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:29:47,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:29:47,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:29:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:29:47,033 INFO L87 Difference]: Start difference. First operand 406 states and 1271 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:47,871 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 131 [2021-06-12 20:29:48,487 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 138 [2021-06-12 20:29:49,059 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-12 20:29:49,248 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-12 20:29:49,590 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-12 20:29:49,789 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-12 20:29:50,105 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2021-06-12 20:29:50,496 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-06-12 20:29:50,719 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 20:29:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:50,779 INFO L93 Difference]: Finished difference Result 771 states and 2234 transitions. [2021-06-12 20:29:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:29:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:50,780 INFO L225 Difference]: With dead ends: 771 [2021-06-12 20:29:50,780 INFO L226 Difference]: Without dead ends: 726 [2021-06-12 20:29:50,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4236.8ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:29:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-06-12 20:29:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 404. [2021-06-12 20:29:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.1364764267990073) internal successors, (1264), 403 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1264 transitions. [2021-06-12 20:29:50,785 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1264 transitions. Word has length 20 [2021-06-12 20:29:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:50,786 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1264 transitions. [2021-06-12 20:29:50,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1264 transitions. [2021-06-12 20:29:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:50,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:50,786 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:51,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7285 [2021-06-12 20:29:51,001 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash 937121676, now seen corresponding path program 50 times [2021-06-12 20:29:51,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:51,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097269380] [2021-06-12 20:29:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:51,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:51,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097269380] [2021-06-12 20:29:51,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097269380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:51,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256716385] [2021-06-12 20:29:51,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:51,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:29:51,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:29:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:29:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:51,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:51,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:51,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:29:51,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:51,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:51,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:51,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:51,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:29:51,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:51,923 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2021-06-12 20:29:51,923 INFO L628 ElimStorePlain]: treesize reduction 107, result has 73.0 percent of original size [2021-06-12 20:29:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:29:51,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:51,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:51,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:52,037 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-12 20:29:52,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:52,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:52,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:52,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:52,043 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:52,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:52,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:52,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:52,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:52,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:52,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:52,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:52,253 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:29:52,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:52,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:52,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:52,259 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:52,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:52,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:52,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:52,362 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:52,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:52,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:29:52,464 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:537, output treesize:215 [2021-06-12 20:29:52,643 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-06-12 20:29:52,963 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 94 [2021-06-12 20:29:53,501 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1050, v_prenex_1052, v_prenex_1044, v_prenex_1046, array_6, v_prenex_1048], 1=[v_prenex_1051, array_3, v_prenex_1043, v_prenex_1045, v_prenex_1047, v_prenex_1049]} [2021-06-12 20:29:53,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:53,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:53,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:53,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:53,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:53,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:53,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:53,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:53,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:53,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:53,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:29:53,555 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:53,854 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2021-06-12 20:29:53,855 INFO L628 ElimStorePlain]: treesize reduction 1112, result has 14.9 percent of original size [2021-06-12 20:29:53,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:53,861 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:53,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:53,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:53,940 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:54,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:54,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:29:54,012 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:54,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:54,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:29:54,081 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:54,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:54,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:54,146 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:54,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:29:54,204 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1051 vanished before elimination [2021-06-12 20:29:54,204 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:29:54,204 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1043 vanished before elimination [2021-06-12 20:29:54,204 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1045 vanished before elimination [2021-06-12 20:29:54,204 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1047 vanished before elimination [2021-06-12 20:29:54,204 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1049 vanished before elimination [2021-06-12 20:29:54,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:29:54,206 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1537, output treesize:107 [2021-06-12 20:29:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:54,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256716385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:54,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:29:54,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:29:54,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188044942] [2021-06-12 20:29:54,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:29:54,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:29:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:29:54,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:29:54,339 INFO L87 Difference]: Start difference. First operand 404 states and 1264 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:54,895 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2021-06-12 20:29:55,391 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 152 [2021-06-12 20:29:56,043 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 170 [2021-06-12 20:29:56,662 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 164 [2021-06-12 20:29:57,352 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 182 [2021-06-12 20:29:58,062 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 188 [2021-06-12 20:29:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:29:58,098 INFO L93 Difference]: Finished difference Result 734 states and 2133 transitions. [2021-06-12 20:29:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:29:58,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:29:58,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:29:58,099 INFO L225 Difference]: With dead ends: 734 [2021-06-12 20:29:58,099 INFO L226 Difference]: Without dead ends: 680 [2021-06-12 20:29:58,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4399.7ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:29:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-12 20:29:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 408. [2021-06-12 20:29:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.14004914004914) internal successors, (1278), 407 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1278 transitions. [2021-06-12 20:29:58,104 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1278 transitions. Word has length 20 [2021-06-12 20:29:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:29:58,104 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1278 transitions. [2021-06-12 20:29:58,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:29:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1278 transitions. [2021-06-12 20:29:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:29:58,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:29:58,105 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:29:58,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7485 [2021-06-12 20:29:58,305 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:29:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:29:58,305 INFO L82 PathProgramCache]: Analyzing trace with hash 844201320, now seen corresponding path program 51 times [2021-06-12 20:29:58,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:29:58,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983160002] [2021-06-12 20:29:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:29:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:29:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:29:58,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:29:58,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983160002] [2021-06-12 20:29:58,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983160002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:29:58,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019896032] [2021-06-12 20:29:58,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:29:58,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:29:58,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:29:58,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:29:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:29:58,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:58,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:58,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:29:58,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:58,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:58,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:58,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:58,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:58,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:58,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:58,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:59,059 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-12 20:29:59,060 INFO L628 ElimStorePlain]: treesize reduction 367, result has 44.1 percent of original size [2021-06-12 20:29:59,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:59,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:59,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:29:59,065 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:59,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:29:59,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:59,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:29:59,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:59,254 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 20:29:59,255 INFO L628 ElimStorePlain]: treesize reduction 22, result has 91.4 percent of original size [2021-06-12 20:29:59,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:29:59,259 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:59,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:59,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:59,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:59,264 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:59,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:29:59,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:29:59,268 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:29:59,407 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-12 20:29:59,407 INFO L628 ElimStorePlain]: treesize reduction 29, result has 85.2 percent of original size [2021-06-12 20:29:59,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:29:59,410 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:751, output treesize:143 [2021-06-12 20:29:59,545 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 20:30:00,048 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-12 20:30:00,547 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1066, v_prenex_1068, array_6], 1=[array_3, v_prenex_1065, v_prenex_1067]} [2021-06-12 20:30:00,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:00,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:00,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:30:00,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:00,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:30:00,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:00,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:30:00,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:00,575 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:00,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:00,581 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:00,819 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2021-06-12 20:30:00,819 INFO L628 ElimStorePlain]: treesize reduction 631, result has 25.2 percent of original size [2021-06-12 20:30:00,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:00,824 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:00,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:30:00,827 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:00,969 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-12 20:30:00,970 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-12 20:30:00,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:00,973 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:01,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:01,043 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:30:01,043 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1065 vanished before elimination [2021-06-12 20:30:01,044 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1067 vanished before elimination [2021-06-12 20:30:01,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:30:01,045 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 9 variables, input treesize:978, output treesize:144 [2021-06-12 20:30:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:01,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019896032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:01,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:01,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:30:01,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831114074] [2021-06-12 20:30:01,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:30:01,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:01,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:30:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:30:01,236 INFO L87 Difference]: Start difference. First operand 408 states and 1278 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:01,707 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-12 20:30:02,241 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 116 [2021-06-12 20:30:02,942 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 136 [2021-06-12 20:30:03,323 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 113 [2021-06-12 20:30:03,729 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2021-06-12 20:30:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:03,776 INFO L93 Difference]: Finished difference Result 686 states and 2062 transitions. [2021-06-12 20:30:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:30:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:30:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:03,777 INFO L225 Difference]: With dead ends: 686 [2021-06-12 20:30:03,777 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 20:30:03,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3045.9ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:30:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 20:30:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 414. [2021-06-12 20:30:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.152542372881356) internal successors, (1302), 413 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1302 transitions. [2021-06-12 20:30:03,782 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1302 transitions. Word has length 20 [2021-06-12 20:30:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:03,782 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1302 transitions. [2021-06-12 20:30:03,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1302 transitions. [2021-06-12 20:30:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:30:03,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:03,783 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:03,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7598 [2021-06-12 20:30:03,983 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash 637193638, now seen corresponding path program 52 times [2021-06-12 20:30:03,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:03,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393478999] [2021-06-12 20:30:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:04,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:04,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393478999] [2021-06-12 20:30:04,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393478999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:04,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894716009] [2021-06-12 20:30:04,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:04,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:30:04,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:04,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:30:04,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:04,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:04,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:04,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:04,790 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-12 20:30:04,791 INFO L628 ElimStorePlain]: treesize reduction 155, result has 66.2 percent of original size [2021-06-12 20:30:04,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:04,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:04,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:04,899 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:30:04,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:04,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:04,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:04,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:04,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:04,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:04,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:04,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:05,084 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-06-12 20:30:05,085 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.3 percent of original size [2021-06-12 20:30:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:05,089 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:05,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:05,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:05,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:05,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:05,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:05,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:05,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:05,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:05,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:05,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:05,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:05,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:05,263 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:05,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:05,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:30:05,267 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:05,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:05,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:30:05,338 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:465, output treesize:167 [2021-06-12 20:30:05,477 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-06-12 20:30:05,999 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-06-12 20:30:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:06,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894716009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:06,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:06,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:30:06,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009490734] [2021-06-12 20:30:06,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:30:06,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:06,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:30:06,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:30:06,161 INFO L87 Difference]: Start difference. First operand 414 states and 1302 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:06,734 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2021-06-12 20:30:07,234 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 137 [2021-06-12 20:30:07,851 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 146 [2021-06-12 20:30:08,490 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 158 [2021-06-12 20:30:09,144 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 167 [2021-06-12 20:30:09,697 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 161 [2021-06-12 20:30:10,375 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 172 [2021-06-12 20:30:10,935 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 164 [2021-06-12 20:30:11,638 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 169 [2021-06-12 20:30:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:11,657 INFO L93 Difference]: Finished difference Result 789 states and 2272 transitions. [2021-06-12 20:30:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:30:11,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:30:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:11,658 INFO L225 Difference]: With dead ends: 789 [2021-06-12 20:30:11,658 INFO L226 Difference]: Without dead ends: 732 [2021-06-12 20:30:11,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 5912.6ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:30:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-12 20:30:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 414. [2021-06-12 20:30:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.152542372881356) internal successors, (1302), 413 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1302 transitions. [2021-06-12 20:30:11,664 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1302 transitions. Word has length 20 [2021-06-12 20:30:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:11,664 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1302 transitions. [2021-06-12 20:30:11,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1302 transitions. [2021-06-12 20:30:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:30:11,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:11,665 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:11,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7807,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:11,865 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2058431408, now seen corresponding path program 53 times [2021-06-12 20:30:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:11,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764745301] [2021-06-12 20:30:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:12,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:12,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764745301] [2021-06-12 20:30:12,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764745301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:12,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657153340] [2021-06-12 20:30:12,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:12,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:30:12,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:12,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:30:12,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:12,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:12,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:12,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:12,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:30:12,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:30:12,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:12,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:30:12,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:30:12,252 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:12,257 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:12,261 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:12,266 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:12,270 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:12,275 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:12,279 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:12,284 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:30:12,288 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:12,293 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:12,298 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:12,302 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:30:12,306 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:12,311 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:12,316 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:30:12,320 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:30:12,324 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:12,329 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:30:12,333 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:12,337 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:30:12,342 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:12,346 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:12,350 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:12,355 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:12,359 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:30:12,363 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:12,367 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:12,372 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:30:12,375 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:30:12,379 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:12,518 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-06-12 20:30:12,519 INFO L628 ElimStorePlain]: treesize reduction 493, result has 21.1 percent of original size [2021-06-12 20:30:12,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 20:30:12,520 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1501, output treesize:132 [2021-06-12 20:30:12,798 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-06-12 20:30:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:13,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657153340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:13,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:13,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:30:13,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126732762] [2021-06-12 20:30:13,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:30:13,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:13,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:30:13,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:30:13,211 INFO L87 Difference]: Start difference. First operand 414 states and 1302 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:13,728 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-12 20:30:13,949 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-12 20:30:14,377 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2021-06-12 20:30:14,625 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-12 20:30:15,063 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-06-12 20:30:15,492 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2021-06-12 20:30:15,741 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-06-12 20:30:16,197 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2021-06-12 20:30:16,745 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 98 [2021-06-12 20:30:17,061 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-06-12 20:30:17,768 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2021-06-12 20:30:18,366 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 105 [2021-06-12 20:30:18,712 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-06-12 20:30:19,338 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 109 [2021-06-12 20:30:19,818 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 99 [2021-06-12 20:30:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:19,871 INFO L93 Difference]: Finished difference Result 980 states and 2814 transitions. [2021-06-12 20:30:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:30:19,872 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:30:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:19,873 INFO L225 Difference]: With dead ends: 980 [2021-06-12 20:30:19,873 INFO L226 Difference]: Without dead ends: 911 [2021-06-12 20:30:19,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 7054.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:30:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-06-12 20:30:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 420. [2021-06-12 20:30:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.1455847255369926) internal successors, (1318), 419 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1318 transitions. [2021-06-12 20:30:19,879 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1318 transitions. Word has length 20 [2021-06-12 20:30:19,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:19,879 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1318 transitions. [2021-06-12 20:30:19,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:19,879 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1318 transitions. [2021-06-12 20:30:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:30:19,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:19,880 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:20,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7874 [2021-06-12 20:30:20,080 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:20,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1265659952, now seen corresponding path program 54 times [2021-06-12 20:30:20,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:20,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345368983] [2021-06-12 20:30:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:20,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:20,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345368983] [2021-06-12 20:30:20,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345368983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:20,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433512621] [2021-06-12 20:30:20,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:20,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:30:20,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:20,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:30:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:20,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:20,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:20,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:20,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:20,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:20,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:20,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:20,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:20,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:20,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:20,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:20,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:20,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:21,101 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-06-12 20:30:21,101 INFO L628 ElimStorePlain]: treesize reduction 441, result has 40.6 percent of original size [2021-06-12 20:30:21,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:21,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:21,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:21,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:21,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:21,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:21,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:21,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:21,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:21,232 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-12 20:30:21,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:21,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:30:21,238 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:21,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:21,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:21,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:21,243 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:21,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:21,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:21,248 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:21,434 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 20:30:21,434 INFO L628 ElimStorePlain]: treesize reduction 28, result has 88.2 percent of original size [2021-06-12 20:30:21,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:30:21,438 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:859, output treesize:200 [2021-06-12 20:30:21,613 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-12 20:30:21,848 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2021-06-12 20:30:22,196 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1108, v_prenex_1110, v_prenex_1121, v_prenex_1112, array_6, v_prenex_1114, v_prenex_1102, v_prenex_1116, v_prenex_1104, v_prenex_1106], 1=[v_prenex_1109, array_3, v_prenex_1101, v_prenex_1111, v_prenex_1103, v_prenex_1113, v_prenex_1105, v_prenex_1115, v_prenex_1107, v_prenex_1117]} [2021-06-12 20:30:22,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:22,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:22,558 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 83 [2021-06-12 20:30:22,558 INFO L628 ElimStorePlain]: treesize reduction 876, result has 23.9 percent of original size [2021-06-12 20:30:22,558 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1110 vanished before elimination [2021-06-12 20:30:22,558 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1121 vanished before elimination [2021-06-12 20:30:22,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:22,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:22,674 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 20:30:22,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:22,674 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:30:22,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:22,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:22,787 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 20:30:22,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:22,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1102 vanished before elimination [2021-06-12 20:30:22,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:22,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:22,897 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 20:30:22,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:22,898 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1104 vanished before elimination [2021-06-12 20:30:22,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:22,903 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:23,007 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 20:30:23,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:23,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1109 vanished before elimination [2021-06-12 20:30:23,007 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:30:23,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1101 vanished before elimination [2021-06-12 20:30:23,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1111 vanished before elimination [2021-06-12 20:30:23,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1103 vanished before elimination [2021-06-12 20:30:23,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1113 vanished before elimination [2021-06-12 20:30:23,008 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1105 vanished before elimination [2021-06-12 20:30:23,008 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1115 vanished before elimination [2021-06-12 20:30:23,008 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1107 vanished before elimination [2021-06-12 20:30:23,008 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1117 vanished before elimination [2021-06-12 20:30:23,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:30:23,011 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 30 variables, input treesize:1158, output treesize:216 [2021-06-12 20:30:23,183 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-12 20:30:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:23,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433512621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:23,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:23,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:30:23,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164936222] [2021-06-12 20:30:23,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:30:23,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:23,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:30:23,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:30:23,360 INFO L87 Difference]: Start difference. First operand 420 states and 1318 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:24,041 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-06-12 20:30:24,348 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-06-12 20:30:25,041 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 145 [2021-06-12 20:30:25,549 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 111 [2021-06-12 20:30:26,325 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 149 [2021-06-12 20:30:26,921 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 115 [2021-06-12 20:30:27,935 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 166 [2021-06-12 20:30:28,668 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 136 [2021-06-12 20:30:29,739 WARN L205 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 173 [2021-06-12 20:30:30,492 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 143 [2021-06-12 20:30:31,285 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 145 [2021-06-12 20:30:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:31,286 INFO L93 Difference]: Finished difference Result 965 states and 2768 transitions. [2021-06-12 20:30:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:30:31,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:30:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:31,287 INFO L225 Difference]: With dead ends: 965 [2021-06-12 20:30:31,287 INFO L226 Difference]: Without dead ends: 935 [2021-06-12 20:30:31,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 8468.3ms TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:30:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-12 20:30:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 423. [2021-06-12 20:30:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.1492890995260665) internal successors, (1329), 422 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1329 transitions. [2021-06-12 20:30:31,294 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1329 transitions. Word has length 20 [2021-06-12 20:30:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:31,294 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1329 transitions. [2021-06-12 20:30:31,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1329 transitions. [2021-06-12 20:30:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:30:31,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:31,294 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:31,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7917,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:31,495 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1330586956, now seen corresponding path program 55 times [2021-06-12 20:30:31,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:31,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332543453] [2021-06-12 20:30:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:31,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:31,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332543453] [2021-06-12 20:30:31,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332543453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:31,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384065034] [2021-06-12 20:30:31,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:30:31,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:32,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:32,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:32,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:32,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:32,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:32,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:32,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,354 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-12 20:30:32,354 INFO L628 ElimStorePlain]: treesize reduction 396, result has 43.9 percent of original size [2021-06-12 20:30:32,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:32,360 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:32,365 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:30:32,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,561 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-12 20:30:32,561 INFO L628 ElimStorePlain]: treesize reduction 34, result has 87.6 percent of original size [2021-06-12 20:30:32,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:32,567 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:32,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:32,572 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:30:32,575 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:32,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:32,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:30:32,657 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:805, output treesize:164 [2021-06-12 20:30:32,805 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-12 20:30:33,066 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 73 [2021-06-12 20:30:33,397 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1140, array_6, v_prenex_1138], 1=[array_3, v_prenex_1137, v_prenex_1139]} [2021-06-12 20:30:33,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:33,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:33,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:33,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:33,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:33,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:33,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:33,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:33,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:30:33,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:33,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:30:33,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:33,670 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-06-12 20:30:33,670 INFO L628 ElimStorePlain]: treesize reduction 710, result has 21.8 percent of original size [2021-06-12 20:30:33,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:33,674 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:33,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:33,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:33,755 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:33,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:33,829 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:30:33,829 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1137 vanished before elimination [2021-06-12 20:30:33,829 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1139 vanished before elimination [2021-06-12 20:30:33,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 20:30:33,831 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:1086, output treesize:160 [2021-06-12 20:30:33,971 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-12 20:30:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:34,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384065034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:34,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:34,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:30:34,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678954466] [2021-06-12 20:30:34,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:30:34,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:34,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:30:34,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:30:34,162 INFO L87 Difference]: Start difference. First operand 423 states and 1329 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:34,703 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-12 20:30:35,298 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 117 [2021-06-12 20:30:35,952 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 125 [2021-06-12 20:30:36,732 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 144 [2021-06-12 20:30:37,629 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 159 [2021-06-12 20:30:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:37,673 INFO L93 Difference]: Finished difference Result 753 states and 2239 transitions. [2021-06-12 20:30:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:30:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:30:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:37,674 INFO L225 Difference]: With dead ends: 753 [2021-06-12 20:30:37,674 INFO L226 Difference]: Without dead ends: 731 [2021-06-12 20:30:37,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 4080.1ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:30:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-12 20:30:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 423. [2021-06-12 20:30:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.1492890995260665) internal successors, (1329), 422 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1329 transitions. [2021-06-12 20:30:37,680 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1329 transitions. Word has length 20 [2021-06-12 20:30:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:37,680 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1329 transitions. [2021-06-12 20:30:37,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1329 transitions. [2021-06-12 20:30:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:30:37,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:37,680 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:37,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8014 [2021-06-12 20:30:37,881 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash -854811094, now seen corresponding path program 56 times [2021-06-12 20:30:37,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:37,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208188004] [2021-06-12 20:30:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:38,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:38,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208188004] [2021-06-12 20:30:38,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208188004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:38,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081106855] [2021-06-12 20:30:38,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:38,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:30:38,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:30:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:38,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:38,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:38,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:38,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:38,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:38,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:38,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:38,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:38,710 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:38,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:38,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:38,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:39,030 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-12 20:30:39,030 INFO L628 ElimStorePlain]: treesize reduction 413, result has 45.4 percent of original size [2021-06-12 20:30:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:39,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:39,036 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:39,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:39,041 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:39,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:39,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:39,046 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:39,284 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-12 20:30:39,285 INFO L628 ElimStorePlain]: treesize reduction 28, result has 91.1 percent of original size [2021-06-12 20:30:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:30:39,290 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:39,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:39,295 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:39,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:39,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:39,300 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:39,481 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 20:30:39,481 INFO L628 ElimStorePlain]: treesize reduction 37, result has 84.5 percent of original size [2021-06-12 20:30:39,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:30:39,486 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:859, output treesize:192 [2021-06-12 20:30:39,655 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-12 20:30:40,030 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2021-06-12 20:30:40,202 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1152, v_prenex_1154, v_prenex_1156, array_6], 1=[array_3, v_prenex_1151, v_prenex_1153, v_prenex_1155]} [2021-06-12 20:30:40,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:30:40,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:40,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:40,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:40,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:40,237 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:40,244 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,576 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 77 [2021-06-12 20:30:40,576 INFO L628 ElimStorePlain]: treesize reduction 969, result has 21.5 percent of original size [2021-06-12 20:30:40,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:30:40,581 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,682 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 20:30:40,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:40,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:40,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:40,788 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:40,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:40,882 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:30:40,882 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1151 vanished before elimination [2021-06-12 20:30:40,882 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1153 vanished before elimination [2021-06-12 20:30:40,882 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1155 vanished before elimination [2021-06-12 20:30:40,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 20:30:40,884 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1408, output treesize:217 [2021-06-12 20:30:41,045 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:30:41,213 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-12 20:30:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:41,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081106855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:41,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:41,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:30:41,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666420912] [2021-06-12 20:30:41,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:30:41,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:30:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:30:41,299 INFO L87 Difference]: Start difference. First operand 423 states and 1329 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:41,931 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-06-12 20:30:42,233 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-12 20:30:42,629 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 105 [2021-06-12 20:30:42,922 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-06-12 20:30:43,390 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 121 [2021-06-12 20:30:43,894 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 117 [2021-06-12 20:30:44,228 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 108 [2021-06-12 20:30:44,790 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 133 [2021-06-12 20:30:45,390 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 128 [2021-06-12 20:30:45,796 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 119 [2021-06-12 20:30:46,505 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 149 [2021-06-12 20:30:46,998 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 134 [2021-06-12 20:30:47,641 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 135 [2021-06-12 20:30:48,070 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2021-06-12 20:30:48,807 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 153 [2021-06-12 20:30:49,318 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 137 [2021-06-12 20:30:50,042 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 144 [2021-06-12 20:30:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:50,076 INFO L93 Difference]: Finished difference Result 1078 states and 3048 transitions. [2021-06-12 20:30:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:30:50,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:30:50,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:50,077 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 20:30:50,077 INFO L226 Difference]: Without dead ends: 1006 [2021-06-12 20:30:50,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 9174.0ms TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:30:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-06-12 20:30:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 422. [2021-06-12 20:30:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.152019002375297) internal successors, (1327), 421 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1327 transitions. [2021-06-12 20:30:50,084 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1327 transitions. Word has length 20 [2021-06-12 20:30:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:50,084 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1327 transitions. [2021-06-12 20:30:50,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1327 transitions. [2021-06-12 20:30:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:30:50,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:50,084 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:50,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8126 [2021-06-12 20:30:50,285 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash -51697496, now seen corresponding path program 57 times [2021-06-12 20:30:50,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:50,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549796496] [2021-06-12 20:30:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:50,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:50,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549796496] [2021-06-12 20:30:50,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549796496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:50,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691294510] [2021-06-12 20:30:50,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:50,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:30:50,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:30:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:50,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:50,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:50,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:50,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:50,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:50,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:50,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:50,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:50,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:50,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:50,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:50,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:50,957 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:51,240 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-12 20:30:51,241 INFO L628 ElimStorePlain]: treesize reduction 375, result has 46.2 percent of original size [2021-06-12 20:30:51,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:30:51,246 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:51,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:51,252 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:51,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:30:51,256 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:51,455 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 20:30:51,455 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.0 percent of original size [2021-06-12 20:30:51,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:51,460 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:51,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:51,464 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:51,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:30:51,468 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:51,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:51,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:30:51,565 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:859, output treesize:199 [2021-06-12 20:30:52,258 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 81 [2021-06-12 20:30:52,509 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1181, v_prenex_1183, v_prenex_1185, array_6, v_prenex_1177, v_prenex_1179], 1=[v_prenex_1180, v_prenex_1182, array_3, v_prenex_1184, v_prenex_1176, v_prenex_1178]} [2021-06-12 20:30:52,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:52,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:52,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:30:52,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:52,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:30:52,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:52,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:52,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:52,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:52,550 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:52,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:30:52,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:52,875 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 85 [2021-06-12 20:30:52,875 INFO L628 ElimStorePlain]: treesize reduction 1068, result has 16.6 percent of original size [2021-06-12 20:30:52,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:52,881 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:52,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:52,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:52,967 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:53,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:53,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:53,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:53,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:53,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:53,131 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:53,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:53,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:30:53,212 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:53,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:30:53,216 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:53,339 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-12 20:30:53,339 INFO L628 ElimStorePlain]: treesize reduction 19, result has 88.3 percent of original size [2021-06-12 20:30:53,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1180 vanished before elimination [2021-06-12 20:30:53,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1182 vanished before elimination [2021-06-12 20:30:53,339 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:30:53,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1184 vanished before elimination [2021-06-12 20:30:53,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1176 vanished before elimination [2021-06-12 20:30:53,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1178 vanished before elimination [2021-06-12 20:30:53,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:30:53,341 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1447, output treesize:107 [2021-06-12 20:30:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:53,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691294510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:53,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:53,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:30:53,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653009843] [2021-06-12 20:30:53,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:30:53,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:53,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:30:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:30:53,473 INFO L87 Difference]: Start difference. First operand 422 states and 1327 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:54,071 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 114 [2021-06-12 20:30:54,619 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 121 [2021-06-12 20:30:55,318 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 136 [2021-06-12 20:30:55,506 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-12 20:30:56,347 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 155 [2021-06-12 20:30:56,685 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2021-06-12 20:30:56,826 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-12 20:30:57,238 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 141 [2021-06-12 20:30:57,611 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 130 [2021-06-12 20:30:57,768 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-12 20:30:58,202 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 145 [2021-06-12 20:30:58,582 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 133 [2021-06-12 20:30:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:58,636 INFO L93 Difference]: Finished difference Result 884 states and 2574 transitions. [2021-06-12 20:30:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:30:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:30:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:58,637 INFO L225 Difference]: With dead ends: 884 [2021-06-12 20:30:58,637 INFO L226 Difference]: Without dead ends: 821 [2021-06-12 20:30:58,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 5417.7ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:30:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-06-12 20:30:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 425. [2021-06-12 20:30:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1485849056603774) internal successors, (1335), 424 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1335 transitions. [2021-06-12 20:30:58,643 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1335 transitions. Word has length 20 [2021-06-12 20:30:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:58,643 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1335 transitions. [2021-06-12 20:30:58,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1335 transitions. [2021-06-12 20:30:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:30:58,644 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:58,644 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:58,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8296 [2021-06-12 20:30:58,844 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:58,844 INFO L82 PathProgramCache]: Analyzing trace with hash -367808852, now seen corresponding path program 58 times [2021-06-12 20:30:58,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:58,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870229845] [2021-06-12 20:30:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:59,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:59,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870229845] [2021-06-12 20:30:59,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870229845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:59,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65031712] [2021-06-12 20:30:59,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:59,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:30:59,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:59,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:30:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:59,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:59,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:30:59,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:59,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:59,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:59,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:59,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,818 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-12 20:30:59,819 INFO L628 ElimStorePlain]: treesize reduction 407, result has 41.2 percent of original size [2021-06-12 20:30:59,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:30:59,823 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:30:59,828 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:30:59,832 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,934 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-12 20:30:59,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:30:59,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:59,940 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:30:59,944 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:30:59,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:30:59,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:30:59,948 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:00,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:00,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:31:00,032 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:805, output treesize:171 [2021-06-12 20:31:00,185 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-12 20:31:00,641 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 79 [2021-06-12 20:31:00,907 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1200, array_6, v_prenex_1202], 1=[array_3, v_prenex_1199, v_prenex_1201]} [2021-06-12 20:31:00,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:00,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:00,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:00,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:31:00,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:00,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:00,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:00,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:31:00,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:00,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:00,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:01,190 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2021-06-12 20:31:01,190 INFO L628 ElimStorePlain]: treesize reduction 781, result has 20.2 percent of original size [2021-06-12 20:31:01,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:01,195 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:01,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:01,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:01,276 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:01,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:01,351 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:31:01,351 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1199 vanished before elimination [2021-06-12 20:31:01,351 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1201 vanished before elimination [2021-06-12 20:31:01,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 20:31:01,353 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:1170, output treesize:160 [2021-06-12 20:31:01,498 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-12 20:31:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:01,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65031712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:01,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:01,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:31:01,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709524676] [2021-06-12 20:31:01,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:31:01,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:31:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:01,710 INFO L87 Difference]: Start difference. First operand 425 states and 1335 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:02,319 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 100 [2021-06-12 20:31:02,606 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-06-12 20:31:02,899 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 105 [2021-06-12 20:31:03,182 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2021-06-12 20:31:03,839 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 132 [2021-06-12 20:31:04,309 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 140 [2021-06-12 20:31:04,875 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 128 [2021-06-12 20:31:05,220 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2021-06-12 20:31:05,801 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 131 [2021-06-12 20:31:06,419 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 135 [2021-06-12 20:31:06,814 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 117 [2021-06-12 20:31:07,175 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 118 [2021-06-12 20:31:07,812 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 138 [2021-06-12 20:31:08,229 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 120 [2021-06-12 20:31:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:08,351 INFO L93 Difference]: Finished difference Result 944 states and 2698 transitions. [2021-06-12 20:31:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:31:08,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:31:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:08,353 INFO L225 Difference]: With dead ends: 944 [2021-06-12 20:31:08,353 INFO L226 Difference]: Without dead ends: 872 [2021-06-12 20:31:08,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 7193.1ms TimeCoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:31:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-12 20:31:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 421. [2021-06-12 20:31:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.1476190476190475) internal successors, (1322), 420 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1322 transitions. [2021-06-12 20:31:08,358 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1322 transitions. Word has length 20 [2021-06-12 20:31:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:08,359 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1322 transitions. [2021-06-12 20:31:08,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1322 transitions. [2021-06-12 20:31:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:31:08,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:08,359 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:08,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8469,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:08,569 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1043679718, now seen corresponding path program 59 times [2021-06-12 20:31:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:08,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413009340] [2021-06-12 20:31:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:08,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413009340] [2021-06-12 20:31:08,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413009340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078687448] [2021-06-12 20:31:08,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:08,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:31:08,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:08,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:31:08,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:09,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:31:09,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:31:09,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:09,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:31:09,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:09,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:09,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:09,041 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:31:09,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:31:09,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:09,054 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:09,058 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:09,062 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:09,067 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:09,071 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:09,075 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:31:09,079 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:09,083 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:09,088 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:09,092 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:09,096 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:09,100 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:09,104 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:31:09,108 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:31:09,113 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:31:09,117 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:31:09,121 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:31:09,125 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:31:09,129 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:31:09,133 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:09,137 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:31:09,142 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:31:09,146 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:31:09,149 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:09,153 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:09,157 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:09,160 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:09,288 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-06-12 20:31:09,288 INFO L628 ElimStorePlain]: treesize reduction 330, result has 30.8 percent of original size [2021-06-12 20:31:09,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:31:09,290 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1657, output treesize:147 [2021-06-12 20:31:09,622 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-06-12 20:31:09,808 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-06-12 20:31:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:09,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078687448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:09,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:09,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:31:09,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429935725] [2021-06-12 20:31:09,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:31:09,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:09,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:31:09,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:31:09,956 INFO L87 Difference]: Start difference. First operand 421 states and 1322 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:10,542 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-12 20:31:10,941 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-06-12 20:31:11,434 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2021-06-12 20:31:12,008 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 106 [2021-06-12 20:31:12,532 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 98 [2021-06-12 20:31:13,307 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 119 [2021-06-12 20:31:13,933 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 115 [2021-06-12 20:31:14,869 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 128 [2021-06-12 20:31:15,083 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-12 20:31:15,539 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 99 [2021-06-12 20:31:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:15,560 INFO L93 Difference]: Finished difference Result 944 states and 2689 transitions. [2021-06-12 20:31:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:31:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:31:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:15,562 INFO L225 Difference]: With dead ends: 944 [2021-06-12 20:31:15,562 INFO L226 Difference]: Without dead ends: 860 [2021-06-12 20:31:15,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5907.0ms TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:31:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-06-12 20:31:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 430. [2021-06-12 20:31:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1515151515151514) internal successors, (1352), 429 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1352 transitions. [2021-06-12 20:31:15,567 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1352 transitions. Word has length 20 [2021-06-12 20:31:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:15,568 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1352 transitions. [2021-06-12 20:31:15,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1352 transitions. [2021-06-12 20:31:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:31:15,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:15,568 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:15,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8622 [2021-06-12 20:31:15,769 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2032740266, now seen corresponding path program 60 times [2021-06-12 20:31:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:15,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812447671] [2021-06-12 20:31:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:15,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:15,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812447671] [2021-06-12 20:31:15,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812447671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:15,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027350321] [2021-06-12 20:31:15,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:15,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:31:15,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:15,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:31:15,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:16,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:16,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:16,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:16,761 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2021-06-12 20:31:16,762 INFO L628 ElimStorePlain]: treesize reduction 194, result has 63.4 percent of original size [2021-06-12 20:31:16,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:16,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:16,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:16,898 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-12 20:31:16,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:16,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:16,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:16,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:31:16,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:16,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:16,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:16,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:17,038 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:31:17,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:17,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:17,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:17,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:17,165 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 20:31:17,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:17,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:17,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:17,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:31:17,171 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:17,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:17,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:17,293 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:31:17,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:17,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:17,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:17,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:31:17,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:17,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:17,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:17,304 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:17,488 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-12 20:31:17,489 INFO L628 ElimStorePlain]: treesize reduction 23, result has 90.5 percent of original size [2021-06-12 20:31:17,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:31:17,494 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:537, output treesize:208 [2021-06-12 20:31:17,669 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-12 20:31:17,994 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1219, v_prenex_1221, array_6, v_prenex_1223, v_prenex_1225, v_prenex_1217], 1=[v_prenex_1218, array_3, v_prenex_1220, v_prenex_1222, v_prenex_1224, v_prenex_1216]} [2021-06-12 20:31:18,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:18,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:18,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:18,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:31:18,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:18,036 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:18,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,447 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 86 [2021-06-12 20:31:18,447 INFO L628 ElimStorePlain]: treesize reduction 1238, result has 17.2 percent of original size [2021-06-12 20:31:18,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:18,452 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,561 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:31:18,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:18,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:31:18,567 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:31:18,573 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,754 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-12 20:31:18,754 INFO L628 ElimStorePlain]: treesize reduction 25, result has 89.0 percent of original size [2021-06-12 20:31:18,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:18,759 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:18,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:18,855 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:18,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:18,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:31:18,945 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:19,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:19,029 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1218 vanished before elimination [2021-06-12 20:31:19,029 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:31:19,029 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1220 vanished before elimination [2021-06-12 20:31:19,029 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1222 vanished before elimination [2021-06-12 20:31:19,029 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1224 vanished before elimination [2021-06-12 20:31:19,029 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1216 vanished before elimination [2021-06-12 20:31:19,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:31:19,032 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1643, output treesize:144 [2021-06-12 20:31:19,174 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:31:19,325 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-12 20:31:19,502 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-12 20:31:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:19,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027350321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:19,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:19,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:31:19,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245927405] [2021-06-12 20:31:19,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:31:19,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:19,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:31:19,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:19,579 INFO L87 Difference]: Start difference. First operand 430 states and 1352 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:20,137 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2021-06-12 20:31:20,572 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-06-12 20:31:20,983 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2021-06-12 20:31:21,775 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 127 [2021-06-12 20:31:22,120 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 112 [2021-06-12 20:31:23,053 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 140 [2021-06-12 20:31:23,623 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 124 [2021-06-12 20:31:24,561 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 143 [2021-06-12 20:31:25,223 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 138 [2021-06-12 20:31:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:25,263 INFO L93 Difference]: Finished difference Result 889 states and 2580 transitions. [2021-06-12 20:31:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:31:25,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:31:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:25,264 INFO L225 Difference]: With dead ends: 889 [2021-06-12 20:31:25,264 INFO L226 Difference]: Without dead ends: 832 [2021-06-12 20:31:25,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 6185.9ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:31:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-06-12 20:31:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 430. [2021-06-12 20:31:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1515151515151514) internal successors, (1352), 429 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1352 transitions. [2021-06-12 20:31:25,270 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1352 transitions. Word has length 20 [2021-06-12 20:31:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1352 transitions. [2021-06-12 20:31:25,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1352 transitions. [2021-06-12 20:31:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:31:25,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:25,270 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:25,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8674 [2021-06-12 20:31:25,471 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash -149030846, now seen corresponding path program 61 times [2021-06-12 20:31:25,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:25,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387005392] [2021-06-12 20:31:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:25,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:25,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387005392] [2021-06-12 20:31:25,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387005392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:25,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783109788] [2021-06-12 20:31:25,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:31:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:26,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:26,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:26,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:26,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:26,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:26,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:26,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:26,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:26,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:26,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:26,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:26,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:26,797 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-06-12 20:31:26,798 INFO L628 ElimStorePlain]: treesize reduction 521, result has 42.7 percent of original size [2021-06-12 20:31:26,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:26,803 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:26,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:26,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:26,809 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:26,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:26,814 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:27,066 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-12 20:31:27,066 INFO L628 ElimStorePlain]: treesize reduction 26, result has 92.9 percent of original size [2021-06-12 20:31:27,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:27,071 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:27,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:27,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:27,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:27,077 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:27,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:27,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:27,082 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:27,201 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 20:31:27,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:27,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:31:27,207 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:27,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:27,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:27,213 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:27,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:27,218 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:27,437 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-12 20:31:27,438 INFO L628 ElimStorePlain]: treesize reduction 19, result has 93.1 percent of original size [2021-06-12 20:31:27,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:31:27,443 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1009, output treesize:229 [2021-06-12 20:31:27,614 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-06-12 20:31:27,802 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-06-12 20:31:28,124 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1251, v_prenex_1253, v_prenex_1243, v_prenex_1245, v_prenex_1258, v_prenex_1249], 1=[v_prenex_1250, v_prenex_1242, v_prenex_1252, v_prenex_1244, v_prenex_1254, v_prenex_1248]} [2021-06-12 20:31:28,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:28,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:28,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:28,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:28,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:28,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:28,365 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 75 [2021-06-12 20:31:28,365 INFO L628 ElimStorePlain]: treesize reduction 431, result has 33.1 percent of original size [2021-06-12 20:31:28,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:31:28,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:28,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:28,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:28,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:28,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:28,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:28,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:28,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:28,594 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1258 vanished before elimination [2021-06-12 20:31:28,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:28,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:28,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:28,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1250 vanished before elimination [2021-06-12 20:31:28,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1242 vanished before elimination [2021-06-12 20:31:28,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1252 vanished before elimination [2021-06-12 20:31:28,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1244 vanished before elimination [2021-06-12 20:31:28,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1254 vanished before elimination [2021-06-12 20:31:28,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1248 vanished before elimination [2021-06-12 20:31:28,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:31:28,669 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 18 variables, input treesize:673, output treesize:145 [2021-06-12 20:31:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:28,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783109788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:28,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:28,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:31:28,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067747672] [2021-06-12 20:31:28,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:31:28,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:31:28,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:28,862 INFO L87 Difference]: Start difference. First operand 430 states and 1352 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:29,456 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2021-06-12 20:31:29,797 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-06-12 20:31:30,115 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2021-06-12 20:31:30,460 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 125 [2021-06-12 20:31:30,727 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-12 20:31:31,058 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 128 [2021-06-12 20:31:31,518 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 147 [2021-06-12 20:31:31,827 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 114 [2021-06-12 20:31:32,254 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 142 [2021-06-12 20:31:32,754 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 155 [2021-06-12 20:31:33,071 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2021-06-12 20:31:33,422 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 125 [2021-06-12 20:31:33,880 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 150 [2021-06-12 20:31:34,183 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2021-06-12 20:31:34,600 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2021-06-12 20:31:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:34,632 INFO L93 Difference]: Finished difference Result 875 states and 2620 transitions. [2021-06-12 20:31:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:31:34,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:31:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:34,633 INFO L225 Difference]: With dead ends: 875 [2021-06-12 20:31:34,633 INFO L226 Difference]: Without dead ends: 845 [2021-06-12 20:31:34,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 6222.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1019, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:31:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-06-12 20:31:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 433. [2021-06-12 20:31:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1481481481481484) internal successors, (1360), 432 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1360 transitions. [2021-06-12 20:31:34,639 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1360 transitions. Word has length 20 [2021-06-12 20:31:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:34,639 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1360 transitions. [2021-06-12 20:31:34,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1360 transitions. [2021-06-12 20:31:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:31:34,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:34,640 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:34,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8825,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:34,841 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash 643740610, now seen corresponding path program 62 times [2021-06-12 20:31:34,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:34,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428507400] [2021-06-12 20:31:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:35,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:35,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428507400] [2021-06-12 20:31:35,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428507400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:35,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801883185] [2021-06-12 20:31:35,239 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:35,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:35,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:31:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:35,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:35,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:35,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:35,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:35,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:35,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:35,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:35,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:35,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:35,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:35,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:35,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:35,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,305 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-06-12 20:31:36,306 INFO L628 ElimStorePlain]: treesize reduction 514, result has 43.5 percent of original size [2021-06-12 20:31:36,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:36,312 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:36,317 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:36,322 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,461 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 20:31:36,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:36,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:36,467 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:36,472 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:36,477 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,728 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 20:31:36,728 INFO L628 ElimStorePlain]: treesize reduction 26, result has 92.5 percent of original size [2021-06-12 20:31:36,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:36,734 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:31:36,738 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:36,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:36,743 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:36,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:36,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:31:36,848 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1009, output treesize:229 [2021-06-12 20:31:37,028 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-06-12 20:31:37,338 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1280, v_prenex_1282, v_prenex_1284, v_prenex_1274, v_prenex_1288, v_prenex_1276], 1=[v_prenex_1281, v_prenex_1273, v_prenex_1283, v_prenex_1275, v_prenex_1285, v_prenex_1279]} [2021-06-12 20:31:37,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:37,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:37,602 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 74 [2021-06-12 20:31:37,602 INFO L628 ElimStorePlain]: treesize reduction 505, result has 32.3 percent of original size [2021-06-12 20:31:37,603 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1282 vanished before elimination [2021-06-12 20:31:37,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:31:37,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:37,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:37,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:37,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:37,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:37,790 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1288 vanished before elimination [2021-06-12 20:31:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:37,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:37,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:37,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1281 vanished before elimination [2021-06-12 20:31:37,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1273 vanished before elimination [2021-06-12 20:31:37,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1283 vanished before elimination [2021-06-12 20:31:37,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1275 vanished before elimination [2021-06-12 20:31:37,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1285 vanished before elimination [2021-06-12 20:31:37,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1279 vanished before elimination [2021-06-12 20:31:37,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:31:37,883 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 18 variables, input treesize:753, output treesize:180 [2021-06-12 20:31:38,025 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-12 20:31:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:38,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801883185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:38,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:38,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:31:38,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149422168] [2021-06-12 20:31:38,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:31:38,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:38,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:31:38,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:38,182 INFO L87 Difference]: Start difference. First operand 433 states and 1360 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:38,494 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-06-12 20:31:38,835 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 103 [2021-06-12 20:31:39,288 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2021-06-12 20:31:39,609 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103 [2021-06-12 20:31:40,251 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 131 [2021-06-12 20:31:40,609 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-06-12 20:31:41,432 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 159 [2021-06-12 20:31:41,833 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 124 [2021-06-12 20:31:42,208 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 119 [2021-06-12 20:31:43,066 WARN L205 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 166 [2021-06-12 20:31:43,506 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 131 [2021-06-12 20:31:43,912 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 126 [2021-06-12 20:31:44,740 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 161 [2021-06-12 20:31:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:44,788 INFO L93 Difference]: Finished difference Result 894 states and 2597 transitions. [2021-06-12 20:31:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:31:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:31:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:44,789 INFO L225 Difference]: With dead ends: 894 [2021-06-12 20:31:44,789 INFO L226 Difference]: Without dead ends: 849 [2021-06-12 20:31:44,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 7177.7ms TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:31:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-06-12 20:31:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 445. [2021-06-12 20:31:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.168918918918919) internal successors, (1407), 444 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1407 transitions. [2021-06-12 20:31:44,795 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1407 transitions. Word has length 20 [2021-06-12 20:31:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:44,795 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1407 transitions. [2021-06-12 20:31:44,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1407 transitions. [2021-06-12 20:31:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:31:44,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:44,796 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:44,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9033,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:44,996 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1336163992, now seen corresponding path program 63 times [2021-06-12 20:31:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:44,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443052238] [2021-06-12 20:31:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:45,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:45,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443052238] [2021-06-12 20:31:45,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443052238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:45,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296780128] [2021-06-12 20:31:45,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:45,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:31:45,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:31:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:45,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:31:45,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:45,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:31:45,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:45,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:31:45,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:45,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:45,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:45,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:45,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:45,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:45,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:31:45,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:46,299 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-06-12 20:31:46,300 INFO L628 ElimStorePlain]: treesize reduction 392, result has 45.6 percent of original size [2021-06-12 20:31:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:31:46,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:46,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:46,311 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:46,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:46,315 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:46,530 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-12 20:31:46,531 INFO L628 ElimStorePlain]: treesize reduction 25, result has 91.5 percent of original size [2021-06-12 20:31:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:31:46,536 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:46,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:46,541 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:46,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:46,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:46,545 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:46,646 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-12 20:31:46,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:46,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:31:46,652 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:919, output treesize:235 [2021-06-12 20:31:47,085 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 83 [2021-06-12 20:31:47,287 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1318, v_prenex_1310, array_6, v_prenex_1312, v_prenex_1314, v_prenex_1316], 1=[v_prenex_1317, v_prenex_1309, array_3, v_prenex_1311, v_prenex_1313, v_prenex_1315]} [2021-06-12 20:31:47,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:47,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:47,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:47,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:31:47,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:31:47,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:31:47,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,666 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 88 [2021-06-12 20:31:47,666 INFO L628 ElimStorePlain]: treesize reduction 1074, result has 16.6 percent of original size [2021-06-12 20:31:47,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:31:47,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:47,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:47,757 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:47,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:47,840 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:47,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:47,920 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:47,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:47,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:31:47,999 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:48,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:48,003 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:48,124 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-12 20:31:48,124 INFO L628 ElimStorePlain]: treesize reduction 19, result has 88.3 percent of original size [2021-06-12 20:31:48,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1317 vanished before elimination [2021-06-12 20:31:48,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1309 vanished before elimination [2021-06-12 20:31:48,124 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:31:48,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1311 vanished before elimination [2021-06-12 20:31:48,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1313 vanished before elimination [2021-06-12 20:31:48,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1315 vanished before elimination [2021-06-12 20:31:48,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:31:48,126 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1495, output treesize:107 [2021-06-12 20:31:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:48,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296780128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:48,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:48,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:31:48,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980718148] [2021-06-12 20:31:48,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:31:48,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:48,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:31:48,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:48,262 INFO L87 Difference]: Start difference. First operand 445 states and 1407 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:48,798 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-06-12 20:31:49,059 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-06-12 20:31:49,462 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 137 [2021-06-12 20:31:49,919 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 128 [2021-06-12 20:31:50,264 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-12 20:31:50,419 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-12 20:31:50,665 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-06-12 20:31:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:50,719 INFO L93 Difference]: Finished difference Result 682 states and 2056 transitions. [2021-06-12 20:31:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:31:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:50,720 INFO L225 Difference]: With dead ends: 682 [2021-06-12 20:31:50,720 INFO L226 Difference]: Without dead ends: 634 [2021-06-12 20:31:50,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2989.7ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:31:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-12 20:31:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 451. [2021-06-12 20:31:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.1622222222222223) internal successors, (1423), 450 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1423 transitions. [2021-06-12 20:31:50,725 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1423 transitions. Word has length 20 [2021-06-12 20:31:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:50,725 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1423 transitions. [2021-06-12 20:31:50,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1423 transitions. [2021-06-12 20:31:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:31:50,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:50,726 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:50,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9178 [2021-06-12 20:31:50,926 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash -856879316, now seen corresponding path program 64 times [2021-06-12 20:31:50,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:50,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43107123] [2021-06-12 20:31:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:51,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43107123] [2021-06-12 20:31:51,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43107123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:51,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452849799] [2021-06-12 20:31:51,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:51,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:51,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:51,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:31:51,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:52,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:31:52,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:52,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:52,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:52,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:52,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:52,054 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,557 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-06-12 20:31:52,558 INFO L628 ElimStorePlain]: treesize reduction 586, result has 46.3 percent of original size [2021-06-12 20:31:52,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:52,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:31:52,570 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:52,576 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,938 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-06-12 20:31:52,938 INFO L628 ElimStorePlain]: treesize reduction 36, result has 92.1 percent of original size [2021-06-12 20:31:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:52,945 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:52,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:52,951 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:52,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:52,956 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:53,133 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 20:31:53,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:53,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:53,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:53,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:53,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:53,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:31:53,145 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:53,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:31:53,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:53,151 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:53,447 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-12 20:31:53,447 INFO L628 ElimStorePlain]: treesize reduction 27, result has 92.6 percent of original size [2021-06-12 20:31:53,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:31:53,454 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:313 [2021-06-12 20:31:53,702 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-06-12 20:31:53,858 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1340, v_prenex_1342, array_6, v_prenex_1334, v_prenex_1344, v_prenex_1355, v_prenex_1336, v_prenex_1346, v_prenex_1338, v_prenex_1348], 1=[v_prenex_1339, array_3, v_prenex_1341, v_prenex_1343, v_prenex_1345, v_prenex_1333, v_prenex_1347, v_prenex_1335, v_prenex_1349, v_prenex_1337]} [2021-06-12 20:31:53,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:31:53,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:53,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:31:53,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:53,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:31:53,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:54,248 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 86 [2021-06-12 20:31:54,249 INFO L628 ElimStorePlain]: treesize reduction 770, result has 27.4 percent of original size [2021-06-12 20:31:54,249 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1342 vanished before elimination [2021-06-12 20:31:54,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:31:54,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:54,365 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:31:54,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:54,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:54,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:54,479 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 20:31:54,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:54,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:31:54,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:54,595 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 20:31:54,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:54,596 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1355 vanished before elimination [2021-06-12 20:31:54,596 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1336 vanished before elimination [2021-06-12 20:31:54,596 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1346 vanished before elimination [2021-06-12 20:31:54,596 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1338 vanished before elimination [2021-06-12 20:31:54,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:31:54,601 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:31:54,706 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 20:31:54,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:31:54,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1339 vanished before elimination [2021-06-12 20:31:54,706 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:31:54,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1341 vanished before elimination [2021-06-12 20:31:54,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1343 vanished before elimination [2021-06-12 20:31:54,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1345 vanished before elimination [2021-06-12 20:31:54,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1333 vanished before elimination [2021-06-12 20:31:54,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1347 vanished before elimination [2021-06-12 20:31:54,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1335 vanished before elimination [2021-06-12 20:31:54,707 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1349 vanished before elimination [2021-06-12 20:31:54,707 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1337 vanished before elimination [2021-06-12 20:31:54,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:31:54,709 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 30 variables, input treesize:1154, output treesize:216 [2021-06-12 20:31:54,875 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-12 20:31:55,034 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:31:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:55,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452849799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:55,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:55,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:31:55,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525074824] [2021-06-12 20:31:55,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:31:55,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:55,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:31:55,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:55,112 INFO L87 Difference]: Start difference. First operand 451 states and 1423 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:55,761 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 104 [2021-06-12 20:31:56,170 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 109 [2021-06-12 20:31:56,655 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 130 [2021-06-12 20:31:57,036 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2021-06-12 20:31:57,305 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-06-12 20:31:57,688 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-12 20:31:57,970 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-12 20:31:58,288 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2021-06-12 20:31:58,470 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-12 20:31:58,873 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-06-12 20:31:59,192 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2021-06-12 20:31:59,391 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-12 20:31:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:59,526 INFO L93 Difference]: Finished difference Result 807 states and 2413 transitions. [2021-06-12 20:31:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:31:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:31:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:59,527 INFO L225 Difference]: With dead ends: 807 [2021-06-12 20:31:59,527 INFO L226 Difference]: Without dead ends: 735 [2021-06-12 20:31:59,528 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 4880.0ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:31:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-06-12 20:31:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 448. [2021-06-12 20:31:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1655480984340043) internal successors, (1415), 447 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1415 transitions. [2021-06-12 20:31:59,533 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1415 transitions. Word has length 20 [2021-06-12 20:31:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:59,533 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1415 transitions. [2021-06-12 20:31:59,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1415 transitions. [2021-06-12 20:31:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:31:59,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:59,534 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:59,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9348 [2021-06-12 20:31:59,734 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:59,734 INFO L82 PathProgramCache]: Analyzing trace with hash -321649514, now seen corresponding path program 65 times [2021-06-12 20:31:59,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:59,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371086554] [2021-06-12 20:31:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:59,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:59,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371086554] [2021-06-12 20:31:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371086554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:59,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887888382] [2021-06-12 20:31:59,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:59,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:31:59,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:31:59,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:00,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:32:00,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:00,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:00,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:00,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:00,177 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:00,181 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:00,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:00,189 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:00,194 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:32:00,198 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:00,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:00,206 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:32:00,210 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:00,214 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:00,219 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:00,223 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:00,227 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:00,231 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:00,235 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:32:00,239 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:00,243 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:00,247 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:00,251 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:00,419 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-12 20:32:00,419 INFO L628 ElimStorePlain]: treesize reduction 266, result has 44.6 percent of original size [2021-06-12 20:32:00,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:32:00,420 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1039, output treesize:214 [2021-06-12 20:32:00,793 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-12 20:32:00,952 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:32:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:01,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887888382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:01,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:01,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:32:01,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809671950] [2021-06-12 20:32:01,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:32:01,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:01,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:32:01,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:32:01,026 INFO L87 Difference]: Start difference. First operand 448 states and 1415 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:01,780 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2021-06-12 20:32:02,017 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-12 20:32:02,315 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-12 20:32:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:02,350 INFO L93 Difference]: Finished difference Result 686 states and 2063 transitions. [2021-06-12 20:32:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:32:02,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:02,351 INFO L225 Difference]: With dead ends: 686 [2021-06-12 20:32:02,351 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 20:32:02,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1754.5ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:32:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 20:32:02,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 448. [2021-06-12 20:32:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1655480984340043) internal successors, (1415), 447 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1415 transitions. [2021-06-12 20:32:02,356 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1415 transitions. Word has length 20 [2021-06-12 20:32:02,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:02,356 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1415 transitions. [2021-06-12 20:32:02,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1415 transitions. [2021-06-12 20:32:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:02,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:02,357 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:02,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9508,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:02,557 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2020369902, now seen corresponding path program 66 times [2021-06-12 20:32:02,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:02,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565025299] [2021-06-12 20:32:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:02,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:02,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565025299] [2021-06-12 20:32:02,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565025299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:02,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687709616] [2021-06-12 20:32:02,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:02,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:32:02,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:02,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:32:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:03,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:03,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:03,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:03,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:03,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:03,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:03,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:03,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:03,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:03,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:03,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:03,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:03,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,032 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-06-12 20:32:04,033 INFO L628 ElimStorePlain]: treesize reduction 602, result has 45.7 percent of original size [2021-06-12 20:32:04,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:32:04,039 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:04,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:04,051 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,248 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:32:04,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:04,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:04,255 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:04,261 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:04,267 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,452 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:32:04,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:04,459 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:04,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:04,465 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:04,470 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:04,624 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 20:32:04,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:04,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:32:04,633 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1273, output treesize:359 [2021-06-12 20:32:04,887 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2021-06-12 20:32:05,113 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1380, v_prenex_1372, v_prenex_1382, v_prenex_1374, v_prenex_1376, array_6, v_prenex_1378], 1=[v_prenex_1381, array_0, v_prenex_1371, v_prenex_1373, v_prenex_1375, v_prenex_1377, v_prenex_1379]} [2021-06-12 20:32:05,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:05,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:05,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:05,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:05,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:05,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:05,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:05,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:05,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:05,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:05,169 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:05,676 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 106 [2021-06-12 20:32:05,676 INFO L628 ElimStorePlain]: treesize reduction 1604, result has 16.3 percent of original size [2021-06-12 20:32:05,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:32:05,683 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:05,811 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:32:05,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:05,818 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:05,941 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:32:05,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:05,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:05,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:06,068 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 20:32:06,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:06,080 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:06,200 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:32:06,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:06,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:06,206 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:06,328 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:32:06,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:06,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:32:06,334 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:06,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:06,339 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:06,535 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-12 20:32:06,535 INFO L628 ElimStorePlain]: treesize reduction 33, result has 87.0 percent of original size [2021-06-12 20:32:06,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1381 vanished before elimination [2021-06-12 20:32:06,536 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:32:06,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1371 vanished before elimination [2021-06-12 20:32:06,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1373 vanished before elimination [2021-06-12 20:32:06,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1375 vanished before elimination [2021-06-12 20:32:06,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1377 vanished before elimination [2021-06-12 20:32:06,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1379 vanished before elimination [2021-06-12 20:32:06,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:32:06,539 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 21 variables, input treesize:2037, output treesize:175 [2021-06-12 20:32:06,703 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:32:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:06,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687709616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:06,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:06,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:32:06,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706326473] [2021-06-12 20:32:06,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:32:06,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:06,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:32:06,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:06,916 INFO L87 Difference]: Start difference. First operand 448 states and 1415 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:07,413 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-12 20:32:07,813 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 97 [2021-06-12 20:32:08,344 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 165 [2021-06-12 20:32:08,635 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2021-06-12 20:32:09,053 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-06-12 20:32:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:09,100 INFO L93 Difference]: Finished difference Result 686 states and 2057 transitions. [2021-06-12 20:32:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:32:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:09,102 INFO L225 Difference]: With dead ends: 686 [2021-06-12 20:32:09,102 INFO L226 Difference]: Without dead ends: 664 [2021-06-12 20:32:09,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2801.4ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:32:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-12 20:32:09,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 451. [2021-06-12 20:32:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.168888888888889) internal successors, (1426), 450 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1426 transitions. [2021-06-12 20:32:09,107 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1426 transitions. Word has length 20 [2021-06-12 20:32:09,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:09,107 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1426 transitions. [2021-06-12 20:32:09,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:09,107 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1426 transitions. [2021-06-12 20:32:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:09,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:09,107 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:09,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9580 [2021-06-12 20:32:09,308 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:09,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2101349702, now seen corresponding path program 67 times [2021-06-12 20:32:09,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:09,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901690782] [2021-06-12 20:32:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:09,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:09,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901690782] [2021-06-12 20:32:09,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901690782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:09,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119136012] [2021-06-12 20:32:09,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:32:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:10,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:10,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:10,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:10,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:32:10,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:10,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:10,318 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,686 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-06-12 20:32:10,687 INFO L628 ElimStorePlain]: treesize reduction 598, result has 40.6 percent of original size [2021-06-12 20:32:10,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:10,693 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:10,698 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:10,703 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,852 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:32:10,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:10,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:10,859 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:10,869 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:10,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:10,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:10,874 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,147 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-12 20:32:11,147 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:32:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:11,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:11,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:11,153 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:11,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:11,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:11,158 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:11,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:11,163 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,295 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 20:32:11,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:11,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:32:11,304 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:327 [2021-06-12 20:32:11,529 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 94 [2021-06-12 20:32:11,722 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-12 20:32:11,878 INFO L446 ElimStorePlain]: Different costs {0=[array_6, v_prenex_1401], 1=[array_0, v_prenex_1400]} [2021-06-12 20:32:11,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:11,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:11,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:11,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:11,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:11,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:11,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:11,905 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:12,028 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-12 20:32:12,029 INFO L628 ElimStorePlain]: treesize reduction 292, result has 30.5 percent of original size [2021-06-12 20:32:12,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:12,032 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:12,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:12,077 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:32:12,077 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1400 vanished before elimination [2021-06-12 20:32:12,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:32:12,079 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:630, output treesize:105 [2021-06-12 20:32:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:12,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119136012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:12,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:12,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:32:12,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319116326] [2021-06-12 20:32:12,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:32:12,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:12,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:32:12,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:12,213 INFO L87 Difference]: Start difference. First operand 451 states and 1426 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:12,731 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2021-06-12 20:32:13,021 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2021-06-12 20:32:13,555 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 182 [2021-06-12 20:32:14,578 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 197 [2021-06-12 20:32:14,796 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 20:32:15,019 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-12 20:32:15,192 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-12 20:32:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:15,212 INFO L93 Difference]: Finished difference Result 675 states and 2028 transitions. [2021-06-12 20:32:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:32:15,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:15,213 INFO L225 Difference]: With dead ends: 675 [2021-06-12 20:32:15,213 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:32:15,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3503.2ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:32:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:32:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 448. [2021-06-12 20:32:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.1655480984340043) internal successors, (1415), 447 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1415 transitions. [2021-06-12 20:32:15,218 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1415 transitions. Word has length 20 [2021-06-12 20:32:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:15,218 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1415 transitions. [2021-06-12 20:32:15,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1415 transitions. [2021-06-12 20:32:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:15,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:15,219 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:15,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9742 [2021-06-12 20:32:15,419 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1049441532, now seen corresponding path program 68 times [2021-06-12 20:32:15,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:15,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671719922] [2021-06-12 20:32:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:15,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:15,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671719922] [2021-06-12 20:32:15,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671719922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:15,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530757536] [2021-06-12 20:32:15,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:15,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:15,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:15,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:32:15,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:16,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:16,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:16,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:16,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:16,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:16,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:16,474 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-06-12 20:32:16,474 INFO L628 ElimStorePlain]: treesize reduction 166, result has 69.5 percent of original size [2021-06-12 20:32:16,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:16,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:16,635 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:32:16,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:16,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:16,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:16,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:16,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:16,787 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 20:32:16,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:16,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:16,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:16,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:16,798 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:16,913 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:32:16,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:16,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:16,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:16,919 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:17,029 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:32:17,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:17,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:17,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:17,034 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:17,141 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 20:32:17,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:17,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:32:17,147 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:573, output treesize:239 [2021-06-12 20:32:17,356 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-12 20:32:17,706 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 96 [2021-06-12 20:32:17,930 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2021-06-12 20:32:18,162 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1427, v_prenex_1429, v_prenex_1431, array_6, v_prenex_1433, v_prenex_1425], 1=[v_prenex_1428, array_3, v_prenex_1430, v_prenex_1432, v_prenex_1424, v_prenex_1426]} [2021-06-12 20:32:18,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:18,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:18,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:18,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:18,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:18,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:18,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,536 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 83 [2021-06-12 20:32:18,536 INFO L628 ElimStorePlain]: treesize reduction 1244, result has 13.0 percent of original size [2021-06-12 20:32:18,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:18,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:18,617 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:18,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:18,688 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:18,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:18,757 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:18,824 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:18,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:18,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1428 vanished before elimination [2021-06-12 20:32:18,884 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:32:18,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1430 vanished before elimination [2021-06-12 20:32:18,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1432 vanished before elimination [2021-06-12 20:32:18,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1424 vanished before elimination [2021-06-12 20:32:18,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1426 vanished before elimination [2021-06-12 20:32:18,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:32:18,887 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1537, output treesize:107 [2021-06-12 20:32:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:19,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530757536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:19,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:19,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:32:19,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572518284] [2021-06-12 20:32:19,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:32:19,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:32:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:19,029 INFO L87 Difference]: Start difference. First operand 448 states and 1415 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:19,517 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-12 20:32:19,898 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 130 [2021-06-12 20:32:20,460 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 170 [2021-06-12 20:32:20,995 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 135 [2021-06-12 20:32:21,718 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 195 [2021-06-12 20:32:21,896 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-12 20:32:22,247 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-12 20:32:22,411 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 20:32:22,652 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-12 20:32:22,821 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-12 20:32:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:22,862 INFO L93 Difference]: Finished difference Result 726 states and 2168 transitions. [2021-06-12 20:32:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:32:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:22,863 INFO L225 Difference]: With dead ends: 726 [2021-06-12 20:32:22,863 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 20:32:22,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4365.9ms TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:32:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 20:32:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 455. [2021-06-12 20:32:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1740088105726874) internal successors, (1441), 454 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1441 transitions. [2021-06-12 20:32:22,868 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1441 transitions. Word has length 20 [2021-06-12 20:32:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:22,869 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1441 transitions. [2021-06-12 20:32:22,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1441 transitions. [2021-06-12 20:32:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:22,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:22,869 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:23,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9923,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:23,083 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:23,083 INFO L82 PathProgramCache]: Analyzing trace with hash 842433850, now seen corresponding path program 69 times [2021-06-12 20:32:23,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:23,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294753320] [2021-06-12 20:32:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:23,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:23,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294753320] [2021-06-12 20:32:23,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294753320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:23,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230185994] [2021-06-12 20:32:23,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:23,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:32:23,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:23,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:32:23,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:23,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:23,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:23,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:23,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:23,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:23,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:23,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:23,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:23,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:23,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:23,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:23,680 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:23,965 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 20:32:23,966 INFO L628 ElimStorePlain]: treesize reduction 389, result has 43.6 percent of original size [2021-06-12 20:32:23,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:23,971 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:23,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:23,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:23,977 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:23,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:23,981 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:24,176 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-12 20:32:24,176 INFO L628 ElimStorePlain]: treesize reduction 34, result has 87.1 percent of original size [2021-06-12 20:32:24,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:24,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:24,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:24,186 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:24,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:24,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:24,190 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:24,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:24,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:32:24,284 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:841, output treesize:185 [2021-06-12 20:32:24,457 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 20:32:25,048 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1450, v_prenex_1442, v_prenex_1452, array_6, v_prenex_1444, v_prenex_1446, v_prenex_1448, v_prenex_1458], 1=[v_prenex_1449, array_3, v_prenex_1451, v_prenex_1453, v_prenex_1441, v_prenex_1443, v_prenex_1445, v_prenex_1447]} [2021-06-12 20:32:25,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:25,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:25,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:25,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:25,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:25,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:25,362 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 90 [2021-06-12 20:32:25,363 INFO L628 ElimStorePlain]: treesize reduction 570, result has 32.5 percent of original size [2021-06-12 20:32:25,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:25,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:25,470 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-12 20:32:25,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:25,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:25,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:25,577 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:32:25,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:25,577 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:32:25,577 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1444 vanished before elimination [2021-06-12 20:32:25,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:25,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:25,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:25,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:25,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:25,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:25,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:25,780 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:25,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:25,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1449 vanished before elimination [2021-06-12 20:32:25,869 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:32:25,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1451 vanished before elimination [2021-06-12 20:32:25,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1453 vanished before elimination [2021-06-12 20:32:25,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1441 vanished before elimination [2021-06-12 20:32:25,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1443 vanished before elimination [2021-06-12 20:32:25,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1445 vanished before elimination [2021-06-12 20:32:25,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1447 vanished before elimination [2021-06-12 20:32:25,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:32:25,872 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:942, output treesize:183 [2021-06-12 20:32:26,003 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-06-12 20:32:26,149 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-12 20:32:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:26,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230185994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:26,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:26,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:32:26,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076375691] [2021-06-12 20:32:26,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:32:26,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:32:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:26,224 INFO L87 Difference]: Start difference. First operand 455 states and 1441 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:26,674 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-12 20:32:26,970 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2021-06-12 20:32:27,266 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 20:32:27,681 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-06-12 20:32:28,151 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-06-12 20:32:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:28,198 INFO L93 Difference]: Finished difference Result 751 states and 2250 transitions. [2021-06-12 20:32:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:32:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:28,199 INFO L225 Difference]: With dead ends: 751 [2021-06-12 20:32:28,199 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 20:32:28,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2426.2ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:32:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 20:32:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 453. [2021-06-12 20:32:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.172566371681416) internal successors, (1434), 452 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1434 transitions. [2021-06-12 20:32:28,205 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1434 transitions. Word has length 20 [2021-06-12 20:32:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:28,205 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1434 transitions. [2021-06-12 20:32:28,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1434 transitions. [2021-06-12 20:32:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:28,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:28,206 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:28,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10030,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:28,406 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash -376201510, now seen corresponding path program 70 times [2021-06-12 20:32:28,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:28,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36795929] [2021-06-12 20:32:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:28,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36795929] [2021-06-12 20:32:28,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36795929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:28,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909719725] [2021-06-12 20:32:28,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:28,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:32:28,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:32:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:29,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:29,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:29,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:29,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:29,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:29,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,499 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 20:32:29,499 INFO L628 ElimStorePlain]: treesize reduction 470, result has 41.0 percent of original size [2021-06-12 20:32:29,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:29,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:29,510 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:29,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,753 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-12 20:32:29,753 INFO L628 ElimStorePlain]: treesize reduction 33, result has 88.9 percent of original size [2021-06-12 20:32:29,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:29,758 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:29,763 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:29,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:29,768 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:29,879 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-12 20:32:29,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:29,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:32:29,884 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:235 [2021-06-12 20:32:30,108 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-12 20:32:30,356 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 75 [2021-06-12 20:32:30,575 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1470, v_prenex_1472, v_prenex_1474, array_6], 1=[array_3, v_prenex_1471, v_prenex_1473, v_prenex_1469]} [2021-06-12 20:32:30,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:30,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:30,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:30,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:30,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:30,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:30,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:32:30,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:30,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:30,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:30,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:30,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:30,977 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 80 [2021-06-12 20:32:30,977 INFO L628 ElimStorePlain]: treesize reduction 952, result has 24.0 percent of original size [2021-06-12 20:32:30,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:30,983 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:31,102 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:32:31,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:31,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:31,107 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:31,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:31,112 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:31,342 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-12 20:32:31,343 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-12 20:32:31,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:32:31,347 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:31,457 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-12 20:32:31,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:31,457 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:32:31,457 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1471 vanished before elimination [2021-06-12 20:32:31,457 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1473 vanished before elimination [2021-06-12 20:32:31,457 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1469 vanished before elimination [2021-06-12 20:32:31,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:32:31,460 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:1456, output treesize:240 [2021-06-12 20:32:31,617 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-06-12 20:32:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:31,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909719725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:31,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:31,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:32:31,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721591293] [2021-06-12 20:32:31,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:32:31,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:31,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:32:31,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:31,826 INFO L87 Difference]: Start difference. First operand 453 states and 1434 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:32,268 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-12 20:32:32,628 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 93 [2021-06-12 20:32:32,963 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-12 20:32:33,325 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-06-12 20:32:33,752 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2021-06-12 20:32:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:33,784 INFO L93 Difference]: Finished difference Result 718 states and 2169 transitions. [2021-06-12 20:32:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:32:33,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:33,785 INFO L225 Difference]: With dead ends: 718 [2021-06-12 20:32:33,785 INFO L226 Difference]: Without dead ends: 703 [2021-06-12 20:32:33,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2601.0ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:32:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-12 20:32:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 455. [2021-06-12 20:32:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1740088105726874) internal successors, (1441), 454 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1441 transitions. [2021-06-12 20:32:33,791 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1441 transitions. Word has length 20 [2021-06-12 20:32:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:33,791 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1441 transitions. [2021-06-12 20:32:33,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1441 transitions. [2021-06-12 20:32:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:33,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:33,791 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:33,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10169 [2021-06-12 20:32:33,992 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:33,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1645547448, now seen corresponding path program 71 times [2021-06-12 20:32:33,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:33,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323130122] [2021-06-12 20:32:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:34,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323130122] [2021-06-12 20:32:34,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323130122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407822177] [2021-06-12 20:32:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:34,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:34,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:32:34,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:34,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:34,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:32:34,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:34,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:34,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:34,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:34,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:34,355 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:34,360 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:34,365 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:34,369 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:34,374 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:32:34,379 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:34,384 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:32:34,388 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:34,394 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:34,398 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:34,403 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:34,408 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:32:34,412 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:32:34,417 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:34,421 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:34,426 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:34,431 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:34,436 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:32:34,440 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:34,445 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:34,450 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:32:34,454 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:34,459 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:32:34,463 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:34,474 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 2 xjuncts. [2021-06-12 20:32:34,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:34,479 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:34,483 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:34,487 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:34,491 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:32:34,495 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:34,671 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-06-12 20:32:34,672 INFO L628 ElimStorePlain]: treesize reduction 552, result has 23.2 percent of original size [2021-06-12 20:32:34,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 20:32:34,673 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1681, output treesize:167 [2021-06-12 20:32:34,960 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-12 20:32:35,112 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-06-12 20:32:35,405 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-12 20:32:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:35,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407822177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:35,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:35,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:32:35,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114395545] [2021-06-12 20:32:35,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:32:35,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:32:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:32:35,473 INFO L87 Difference]: Start difference. First operand 455 states and 1441 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:35,965 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-12 20:32:36,178 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-12 20:32:36,518 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-12 20:32:36,784 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 20:32:37,139 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-06-12 20:32:37,327 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-12 20:32:37,601 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-12 20:32:37,823 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-12 20:32:38,155 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-12 20:32:38,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:38,192 INFO L93 Difference]: Finished difference Result 717 states and 2149 transitions. [2021-06-12 20:32:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:32:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:38,193 INFO L225 Difference]: With dead ends: 717 [2021-06-12 20:32:38,193 INFO L226 Difference]: Without dead ends: 687 [2021-06-12 20:32:38,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3141.8ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:32:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-12 20:32:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 455. [2021-06-12 20:32:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1740088105726874) internal successors, (1441), 454 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1441 transitions. [2021-06-12 20:32:38,198 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1441 transitions. Word has length 20 [2021-06-12 20:32:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:38,198 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1441 transitions. [2021-06-12 20:32:38,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1441 transitions. [2021-06-12 20:32:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:38,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:38,199 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:38,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10342,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:38,399 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:38,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1329436092, now seen corresponding path program 72 times [2021-06-12 20:32:38,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:38,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645694304] [2021-06-12 20:32:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:38,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:38,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645694304] [2021-06-12 20:32:38,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645694304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:38,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093175114] [2021-06-12 20:32:38,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:38,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:32:38,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:38,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:32:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:39,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:39,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:39,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:39,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:39,061 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:39,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,451 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-12 20:32:39,452 INFO L628 ElimStorePlain]: treesize reduction 453, result has 46.2 percent of original size [2021-06-12 20:32:39,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:39,458 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:39,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:39,468 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,755 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-12 20:32:39,755 INFO L628 ElimStorePlain]: treesize reduction 42, result has 88.4 percent of original size [2021-06-12 20:32:39,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:39,761 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:39,767 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:39,771 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:39,887 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-12 20:32:39,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:39,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:32:39,893 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:235 [2021-06-12 20:32:40,114 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-12 20:32:40,470 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 83 [2021-06-12 20:32:40,756 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1491, v_prenex_1493, v_prenex_1495, array_6, v_prenex_1489], 1=[v_prenex_1490, array_3, v_prenex_1492, v_prenex_1494, v_prenex_1488]} [2021-06-12 20:32:40,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:32:40,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:40,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:40,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:40,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:32:40,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:40,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:40,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:32:40,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:40,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:40,805 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:41,199 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 83 [2021-06-12 20:32:41,199 INFO L628 ElimStorePlain]: treesize reduction 1225, result has 18.3 percent of original size [2021-06-12 20:32:41,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:41,205 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:41,313 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 20:32:41,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:41,318 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:41,425 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 20:32:41,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:41,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:41,430 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:41,535 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 20:32:41,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:41,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:41,540 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:41,642 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 20:32:41,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:41,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1490 vanished before elimination [2021-06-12 20:32:41,643 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:32:41,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1492 vanished before elimination [2021-06-12 20:32:41,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1494 vanished before elimination [2021-06-12 20:32:41,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1488 vanished before elimination [2021-06-12 20:32:41,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:32:41,646 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 15 variables, input treesize:1729, output treesize:216 [2021-06-12 20:32:41,809 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-12 20:32:41,970 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:32:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:42,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093175114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:42,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:42,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:32:42,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088895757] [2021-06-12 20:32:42,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:32:42,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:42,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:32:42,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:42,053 INFO L87 Difference]: Start difference. First operand 455 states and 1441 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:42,949 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2021-06-12 20:32:43,285 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2021-06-12 20:32:43,919 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 123 [2021-06-12 20:32:44,521 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 122 [2021-06-12 20:32:44,803 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 20:32:45,026 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-12 20:32:45,293 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2021-06-12 20:32:45,581 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-12 20:32:45,952 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-06-12 20:32:46,252 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2021-06-12 20:32:46,390 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-12 20:32:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:46,502 INFO L93 Difference]: Finished difference Result 820 states and 2381 transitions. [2021-06-12 20:32:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:32:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:46,503 INFO L225 Difference]: With dead ends: 820 [2021-06-12 20:32:46,503 INFO L226 Difference]: Without dead ends: 748 [2021-06-12 20:32:46,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5002.3ms TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:32:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-12 20:32:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 458. [2021-06-12 20:32:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.177242888402626) internal successors, (1452), 457 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1452 transitions. [2021-06-12 20:32:46,509 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1452 transitions. Word has length 20 [2021-06-12 20:32:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:46,509 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1452 transitions. [2021-06-12 20:32:46,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1452 transitions. [2021-06-12 20:32:46,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:46,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:46,509 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:46,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10408,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:46,710 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1554042634, now seen corresponding path program 73 times [2021-06-12 20:32:46,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:46,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206345138] [2021-06-12 20:32:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:46,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:46,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206345138] [2021-06-12 20:32:46,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206345138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:46,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754485922] [2021-06-12 20:32:46,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:46,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:32:46,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:47,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:47,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:47,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,481 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 22 treesize of output 16 [2021-06-12 20:32:47,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:47,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:47,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:47,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,799 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-12 20:32:47,800 INFO L628 ElimStorePlain]: treesize reduction 459, result has 40.9 percent of original size [2021-06-12 20:32:47,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:47,805 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:47,811 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:32:47,815 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,918 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-12 20:32:47,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:47,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:47,923 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:47,928 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:47,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:47,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:47,932 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:48,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:48,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:32:48,035 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:895, output treesize:199 [2021-06-12 20:32:48,226 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-12 20:32:48,421 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1504, v_prenex_1506, v_prenex_1508, array_6], 1=[v_prenex_1505, v_prenex_1507, array_3, v_prenex_1503]} [2021-06-12 20:32:48,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:48,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:48,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:48,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:48,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:32:48,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:48,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:32:48,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:48,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:48,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:48,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:48,461 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:48,799 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 75 [2021-06-12 20:32:48,799 INFO L628 ElimStorePlain]: treesize reduction 931, result has 22.8 percent of original size [2021-06-12 20:32:48,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:48,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:48,914 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 20:32:48,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:48,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:32:48,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:49,026 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 20:32:49,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:49,031 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:49,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:49,035 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:49,232 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-12 20:32:49,233 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-12 20:32:49,233 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1505 vanished before elimination [2021-06-12 20:32:49,233 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1507 vanished before elimination [2021-06-12 20:32:49,233 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:32:49,233 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1503 vanished before elimination [2021-06-12 20:32:49,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:32:49,235 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:1372, output treesize:190 [2021-06-12 20:32:49,376 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-06-12 20:32:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:49,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754485922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:49,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:49,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:32:49,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329249207] [2021-06-12 20:32:49,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:32:49,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:32:49,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:49,670 INFO L87 Difference]: Start difference. First operand 458 states and 1452 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:50,372 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2021-06-12 20:32:50,682 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-06-12 20:32:50,973 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 20:32:51,172 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-12 20:32:51,473 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-06-12 20:32:51,835 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-06-12 20:32:52,292 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-12 20:32:52,705 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-12 20:32:52,860 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-12 20:32:53,253 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-06-12 20:32:53,682 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2021-06-12 20:32:54,122 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2021-06-12 20:32:54,285 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-12 20:32:54,694 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-12 20:32:54,980 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-12 20:32:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:55,012 INFO L93 Difference]: Finished difference Result 1034 states and 2950 transitions. [2021-06-12 20:32:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:32:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:32:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:55,014 INFO L225 Difference]: With dead ends: 1034 [2021-06-12 20:32:55,014 INFO L226 Difference]: Without dead ends: 962 [2021-06-12 20:32:55,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 5505.9ms TimeCoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:32:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-06-12 20:32:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 463. [2021-06-12 20:32:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.2012987012987013) internal successors, (1479), 462 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1479 transitions. [2021-06-12 20:32:55,021 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1479 transitions. Word has length 20 [2021-06-12 20:32:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:55,021 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1479 transitions. [2021-06-12 20:32:55,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1479 transitions. [2021-06-12 20:32:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:32:55,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:55,022 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:55,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10547,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:55,222 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:55,222 INFO L82 PathProgramCache]: Analyzing trace with hash -564982086, now seen corresponding path program 74 times [2021-06-12 20:32:55,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:55,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122750832] [2021-06-12 20:32:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:55,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:55,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122750832] [2021-06-12 20:32:55,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122750832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:55,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614173193] [2021-06-12 20:32:55,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:55,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:55,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:55,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:32:55,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:55,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:55,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:55,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:56,279 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2021-06-12 20:32:56,279 INFO L628 ElimStorePlain]: treesize reduction 203, result has 64.1 percent of original size [2021-06-12 20:32:56,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:56,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:56,433 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:32:56,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:56,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:56,583 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:32:56,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:56,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:56,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:56,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:56,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:56,738 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:32:56,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:56,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:56,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:56,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:32:56,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:56,877 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:32:56,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:56,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:56,884 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:56,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:32:56,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:32:56,889 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:57,097 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-12 20:32:57,097 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.4 percent of original size [2021-06-12 20:32:57,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:32:57,103 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:573, output treesize:232 [2021-06-12 20:32:57,305 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-12 20:32:57,496 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1527, v_prenex_1529, array_6, v_prenex_1531, v_prenex_1523, v_prenex_1525], 1=[v_prenex_1526, v_prenex_1528, array_3, v_prenex_1530, v_prenex_1522, v_prenex_1524]} [2021-06-12 20:32:57,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:32:57,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:32:57,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:32:57,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:57,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:57,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:57,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:32:57,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:57,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:57,537 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:57,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:57,545 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:57,918 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 85 [2021-06-12 20:32:57,919 INFO L628 ElimStorePlain]: treesize reduction 1302, result has 14.7 percent of original size [2021-06-12 20:32:57,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:32:57,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:58,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:58,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:58,023 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:58,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:58,124 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:58,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:58,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:32:58,217 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:58,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:58,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:32:58,306 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:32:58,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:32:58,388 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1526 vanished before elimination [2021-06-12 20:32:58,389 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1528 vanished before elimination [2021-06-12 20:32:58,389 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:32:58,389 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1530 vanished before elimination [2021-06-12 20:32:58,389 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1522 vanished before elimination [2021-06-12 20:32:58,389 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1524 vanished before elimination [2021-06-12 20:32:58,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:32:58,391 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1643, output treesize:144 [2021-06-12 20:32:58,531 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:32:58,675 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-06-12 20:32:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:58,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614173193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:58,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:58,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:32:58,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920435780] [2021-06-12 20:32:58,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:32:58,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:58,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:32:58,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:58,919 INFO L87 Difference]: Start difference. First operand 463 states and 1479 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:59,417 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-12 20:32:59,810 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-06-12 20:33:00,136 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-06-12 20:33:00,573 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-06-12 20:33:00,784 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-12 20:33:01,319 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 102 [2021-06-12 20:33:01,675 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-12 20:33:02,246 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 105 [2021-06-12 20:33:02,683 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-06-12 20:33:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:02,722 INFO L93 Difference]: Finished difference Result 866 states and 2532 transitions. [2021-06-12 20:33:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:33:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:02,723 INFO L225 Difference]: With dead ends: 866 [2021-06-12 20:33:02,723 INFO L226 Difference]: Without dead ends: 809 [2021-06-12 20:33:02,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4279.1ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:33:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-06-12 20:33:02,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 460. [2021-06-12 20:33:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.189542483660131) internal successors, (1464), 459 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1464 transitions. [2021-06-12 20:33:02,729 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1464 transitions. Word has length 20 [2021-06-12 20:33:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:02,729 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1464 transitions. [2021-06-12 20:33:02,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1464 transitions. [2021-06-12 20:33:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:02,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:02,730 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:02,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10744 [2021-06-12 20:33:02,931 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:02,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1152951686, now seen corresponding path program 75 times [2021-06-12 20:33:02,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:02,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495866900] [2021-06-12 20:33:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:03,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:03,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495866900] [2021-06-12 20:33:03,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495866900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:03,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293933949] [2021-06-12 20:33:03,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:03,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:33:03,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:33:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:03,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:03,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:03,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:03,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:03,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:03,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:33:03,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:03,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:03,697 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:03,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:03,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:03,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,009 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-12 20:33:04,009 INFO L628 ElimStorePlain]: treesize reduction 372, result has 48.5 percent of original size [2021-06-12 20:33:04,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:04,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:04,020 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:04,025 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,152 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 20:33:04,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:04,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:04,158 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:04,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:04,163 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:04,167 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,270 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-12 20:33:04,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:04,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:33:04,277 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:919, output treesize:249 [2021-06-12 20:33:04,711 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 86 [2021-06-12 20:33:04,964 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1559, array_6, v_prenex_1551, v_prenex_1553, v_prenex_1555, v_prenex_1557], 1=[array_3, v_prenex_1550, v_prenex_1552, v_prenex_1554, v_prenex_1556, v_prenex_1558]} [2021-06-12 20:33:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:04,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:33:04,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:04,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:04,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:05,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:05,010 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:05,019 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,359 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 84 [2021-06-12 20:33:05,359 INFO L628 ElimStorePlain]: treesize reduction 1298, result has 12.5 percent of original size [2021-06-12 20:33:05,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:05,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:05,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:33:05,438 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:05,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:05,507 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:05,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:05,573 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:05,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:05,637 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:05,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:05,695 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:33:05,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1550 vanished before elimination [2021-06-12 20:33:05,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1552 vanished before elimination [2021-06-12 20:33:05,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1554 vanished before elimination [2021-06-12 20:33:05,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1556 vanished before elimination [2021-06-12 20:33:05,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1558 vanished before elimination [2021-06-12 20:33:05,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:33:05,696 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1621, output treesize:107 [2021-06-12 20:33:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:05,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293933949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:05,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:05,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:33:05,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947823563] [2021-06-12 20:33:05,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:33:05,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:05,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:33:05,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:33:05,834 INFO L87 Difference]: Start difference. First operand 460 states and 1464 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:06,295 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-12 20:33:06,640 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-12 20:33:06,998 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 122 [2021-06-12 20:33:07,468 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 134 [2021-06-12 20:33:07,690 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-12 20:33:07,908 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-12 20:33:08,074 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-12 20:33:08,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:08,092 INFO L93 Difference]: Finished difference Result 661 states and 2006 transitions. [2021-06-12 20:33:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:33:08,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:08,093 INFO L225 Difference]: With dead ends: 661 [2021-06-12 20:33:08,093 INFO L226 Difference]: Without dead ends: 613 [2021-06-12 20:33:08,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2641.5ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:33:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-12 20:33:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2021-06-12 20:33:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.182795698924731) internal successors, (1480), 465 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1480 transitions. [2021-06-12 20:33:08,098 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1480 transitions. Word has length 20 [2021-06-12 20:33:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:08,098 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1480 transitions. [2021-06-12 20:33:08,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1480 transitions. [2021-06-12 20:33:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:08,099 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:08,099 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:08,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10867,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:08,301 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash 836840330, now seen corresponding path program 76 times [2021-06-12 20:33:08,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:08,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22407429] [2021-06-12 20:33:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:08,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:08,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22407429] [2021-06-12 20:33:08,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22407429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:08,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166159039] [2021-06-12 20:33:08,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:08,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:33:08,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:08,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:33:08,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:09,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:09,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:09,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:09,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:09,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:09,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:09,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:09,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:09,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:09,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:09,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:09,893 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-12 20:33:09,894 INFO L628 ElimStorePlain]: treesize reduction 602, result has 44.9 percent of original size [2021-06-12 20:33:09,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:09,900 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:09,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:09,906 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:09,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:09,912 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:10,114 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:33:10,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:10,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:10,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:10,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:10,121 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:10,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:10,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:10,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:10,128 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:10,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:10,132 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:10,310 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 20:33:10,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:10,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:10,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:10,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:10,317 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:10,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:10,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:10,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:10,323 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:10,328 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:10,644 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-12 20:33:10,645 INFO L628 ElimStorePlain]: treesize reduction 34, result has 90.8 percent of original size [2021-06-12 20:33:10,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:33:10,651 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:314 [2021-06-12 20:33:10,898 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-06-12 20:33:11,124 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1581, array_6, v_prenex_1575, v_prenex_1577, v_prenex_1579], 1=[array_3, v_prenex_1580, v_prenex_1574, v_prenex_1576, v_prenex_1578]} [2021-06-12 20:33:11,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:11,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:11,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:11,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:11,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:33:11,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:11,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:11,158 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:11,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:11,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:11,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:11,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:11,615 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 87 [2021-06-12 20:33:11,616 INFO L628 ElimStorePlain]: treesize reduction 1250, result has 20.4 percent of original size [2021-06-12 20:33:11,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:11,622 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:11,756 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:33:11,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:11,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:11,762 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:11,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:33:11,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:12,017 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-12 20:33:12,018 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:33:12,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:12,023 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:12,143 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 20:33:12,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:12,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:12,148 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:12,266 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 20:33:12,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:12,266 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:33:12,266 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1580 vanished before elimination [2021-06-12 20:33:12,266 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1574 vanished before elimination [2021-06-12 20:33:12,266 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1576 vanished before elimination [2021-06-12 20:33:12,266 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1578 vanished before elimination [2021-06-12 20:33:12,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-12 20:33:12,269 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:1729, output treesize:238 [2021-06-12 20:33:12,435 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-06-12 20:33:12,592 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:33:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:12,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166159039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:12,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:12,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:33:12,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486994559] [2021-06-12 20:33:12,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:33:12,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:12,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:33:12,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:33:12,673 INFO L87 Difference]: Start difference. First operand 466 states and 1480 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:13,229 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-06-12 20:33:13,727 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2021-06-12 20:33:14,148 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 129 [2021-06-12 20:33:14,457 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-12 20:33:14,820 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-06-12 20:33:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:14,866 INFO L93 Difference]: Finished difference Result 677 states and 2055 transitions. [2021-06-12 20:33:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:33:14,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:14,867 INFO L225 Difference]: With dead ends: 677 [2021-06-12 20:33:14,867 INFO L226 Difference]: Without dead ends: 662 [2021-06-12 20:33:14,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2870.6ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:33:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-12 20:33:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 466. [2021-06-12 20:33:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.182795698924731) internal successors, (1480), 465 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1480 transitions. [2021-06-12 20:33:14,872 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1480 transitions. Word has length 20 [2021-06-12 20:33:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:14,873 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1480 transitions. [2021-06-12 20:33:14,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1480 transitions. [2021-06-12 20:33:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:14,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:14,873 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:15,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11017 [2021-06-12 20:33:15,074 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash -861880058, now seen corresponding path program 77 times [2021-06-12 20:33:15,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:15,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116227831] [2021-06-12 20:33:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:15,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116227831] [2021-06-12 20:33:15,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116227831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83095301] [2021-06-12 20:33:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:15,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:33:15,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:33:15,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:15,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:15,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:15,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:15,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:15,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:15,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:15,498 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:15,502 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:15,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:15,510 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:15,514 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:15,517 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:15,521 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:15,525 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:15,529 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:15,533 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:15,537 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:15,541 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:15,545 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-06-12 20:33:15,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:15,549 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:15,553 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:15,557 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:15,561 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:33:15,565 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:15,569 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:15,687 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-12 20:33:15,687 INFO L628 ElimStorePlain]: treesize reduction 251, result has 36.5 percent of original size [2021-06-12 20:33:15,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:33:15,689 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:847, output treesize:144 [2021-06-12 20:33:16,012 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-12 20:33:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:16,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83095301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:16,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:16,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:33:16,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468031037] [2021-06-12 20:33:16,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:33:16,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:16,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:33:16,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:33:16,221 INFO L87 Difference]: Start difference. First operand 466 states and 1480 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:16,744 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-12 20:33:16,962 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-12 20:33:17,217 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-12 20:33:17,561 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-12 20:33:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:17,594 INFO L93 Difference]: Finished difference Result 653 states and 2001 transitions. [2021-06-12 20:33:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:33:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:17,595 INFO L225 Difference]: With dead ends: 653 [2021-06-12 20:33:17,595 INFO L226 Difference]: Without dead ends: 631 [2021-06-12 20:33:17,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1749.4ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:33:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-12 20:33:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 463. [2021-06-12 20:33:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.186147186147186) internal successors, (1472), 462 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1472 transitions. [2021-06-12 20:33:17,600 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1472 transitions. Word has length 20 [2021-06-12 20:33:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:17,600 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1472 transitions. [2021-06-12 20:33:17,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:17,600 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1472 transitions. [2021-06-12 20:33:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:17,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:17,601 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:17,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11206 [2021-06-12 20:33:17,816 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1741930810, now seen corresponding path program 78 times [2021-06-12 20:33:17,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:17,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363569847] [2021-06-12 20:33:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:17,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:17,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363569847] [2021-06-12 20:33:17,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363569847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:17,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378421573] [2021-06-12 20:33:17,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:17,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:33:17,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:17,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:33:17,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:18,419 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2021-06-12 20:33:18,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:18,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:18,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:19,019 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 133 [2021-06-12 20:33:19,020 INFO L628 ElimStorePlain]: treesize reduction 239, result has 68.0 percent of original size [2021-06-12 20:33:19,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:19,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:19,234 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 20:33:19,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:19,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:19,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:19,449 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 20:33:19,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:19,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:19,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:19,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:19,663 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-12 20:33:19,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:19,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:19,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:19,867 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-12 20:33:19,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:19,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:33:19,875 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:19,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:19,881 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:20,059 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 20:33:20,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:20,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:20,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:20,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:20,067 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:20,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:20,072 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:20,229 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:33:20,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:20,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:20,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:20,237 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:20,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:20,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:20,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:20,400 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:33:20,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:20,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:33:20,408 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:753, output treesize:342 [2021-06-12 20:33:20,626 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 101 [2021-06-12 20:33:21,099 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1615, v_prenex_1605, v_prenex_1607, v_prenex_1609, array_6, v_prenex_1611, v_prenex_1613], 1=[v_prenex_1604, v_prenex_1614, v_prenex_1606, array_0, v_prenex_1608, v_prenex_1610, v_prenex_1612]} [2021-06-12 20:33:21,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:21,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:21,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:21,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:21,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:21,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:21,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,639 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 104 [2021-06-12 20:33:21,640 INFO L628 ElimStorePlain]: treesize reduction 1653, result has 14.4 percent of original size [2021-06-12 20:33:21,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:21,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,757 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 20:33:21,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:21,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:21,763 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,868 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 20:33:21,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:21,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:21,874 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:21,978 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 20:33:21,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:21,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:33:21,984 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:22,085 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:33:22,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:22,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:33:22,091 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:22,192 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:33:22,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:22,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:22,198 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:22,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:22,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1604 vanished before elimination [2021-06-12 20:33:22,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1614 vanished before elimination [2021-06-12 20:33:22,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1606 vanished before elimination [2021-06-12 20:33:22,292 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:33:22,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1608 vanished before elimination [2021-06-12 20:33:22,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1610 vanished before elimination [2021-06-12 20:33:22,293 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1612 vanished before elimination [2021-06-12 20:33:22,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:33:22,295 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2085, output treesize:175 [2021-06-12 20:33:22,457 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:33:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:22,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378421573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:22,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:22,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:33:22,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945293069] [2021-06-12 20:33:22,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:33:22,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:22,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:33:22,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:33:22,629 INFO L87 Difference]: Start difference. First operand 463 states and 1472 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:23,383 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 103 [2021-06-12 20:33:23,759 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 151 [2021-06-12 20:33:24,013 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 20:33:24,430 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2021-06-12 20:33:24,650 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-12 20:33:24,929 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-12 20:33:25,345 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2021-06-12 20:33:25,721 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-06-12 20:33:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:25,784 INFO L93 Difference]: Finished difference Result 769 states and 2279 transitions. [2021-06-12 20:33:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:25,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:25,785 INFO L225 Difference]: With dead ends: 769 [2021-06-12 20:33:25,785 INFO L226 Difference]: Without dead ends: 697 [2021-06-12 20:33:25,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3610.6ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:33:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-06-12 20:33:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 463. [2021-06-12 20:33:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.186147186147186) internal successors, (1472), 462 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1472 transitions. [2021-06-12 20:33:25,790 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1472 transitions. Word has length 20 [2021-06-12 20:33:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:25,790 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1472 transitions. [2021-06-12 20:33:25,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1472 transitions. [2021-06-12 20:33:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:25,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:25,791 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:26,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11269 [2021-06-12 20:33:26,006 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:26,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:26,007 INFO L82 PathProgramCache]: Analyzing trace with hash 558385996, now seen corresponding path program 79 times [2021-06-12 20:33:26,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:26,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255508107] [2021-06-12 20:33:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:26,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:26,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255508107] [2021-06-12 20:33:26,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255508107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:26,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426098039] [2021-06-12 20:33:26,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:26,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:33:26,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:26,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:26,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:26,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:26,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:26,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:26,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:33:26,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:26,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:26,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:26,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:26,971 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2021-06-12 20:33:26,972 INFO L628 ElimStorePlain]: treesize reduction 134, result has 72.4 percent of original size [2021-06-12 20:33:26,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:26,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:26,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:33:26,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:26,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:26,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:26,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:27,125 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-12 20:33:27,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:27,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:27,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:27,131 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:27,265 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 20:33:27,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:27,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:27,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:27,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:27,272 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:27,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:27,276 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:27,384 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:33:27,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:27,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:27,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:27,390 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:27,498 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 20:33:27,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:27,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:27,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:27,503 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:27,606 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 20:33:27,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:27,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:33:27,612 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:597, output treesize:242 [2021-06-12 20:33:27,813 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-06-12 20:33:28,058 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1636, v_prenex_1638, array_6, v_prenex_1630, v_prenex_1632, v_prenex_1634], 1=[v_prenex_1637, array_0, v_prenex_1629, v_prenex_1631, v_prenex_1633, v_prenex_1635]} [2021-06-12 20:33:28,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:28,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:28,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:28,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:28,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:28,099 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:28,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,520 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 92 [2021-06-12 20:33:28,520 INFO L628 ElimStorePlain]: treesize reduction 1288, result has 17.2 percent of original size [2021-06-12 20:33:28,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:28,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,638 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:33:28,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:28,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:28,643 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,754 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:33:28,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:28,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:28,760 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,868 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:33:28,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:28,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:33:28,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,981 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 20:33:28,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:28,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:33:28,986 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:28,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:28,990 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:29,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:29,074 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1637 vanished before elimination [2021-06-12 20:33:29,074 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:33:29,074 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1629 vanished before elimination [2021-06-12 20:33:29,074 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1631 vanished before elimination [2021-06-12 20:33:29,074 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1633 vanished before elimination [2021-06-12 20:33:29,074 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1635 vanished before elimination [2021-06-12 20:33:29,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:33:29,077 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1703, output treesize:140 [2021-06-12 20:33:29,215 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:33:29,452 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-12 20:33:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:29,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426098039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:29,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:29,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:33:29,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600458889] [2021-06-12 20:33:29,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:33:29,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:33:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:33:29,527 INFO L87 Difference]: Start difference. First operand 463 states and 1472 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:30,037 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 20:33:30,428 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 135 [2021-06-12 20:33:30,662 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-12 20:33:30,955 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-12 20:33:31,151 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-12 20:33:31,538 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-06-12 20:33:31,994 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-06-12 20:33:32,339 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-12 20:33:32,775 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-06-12 20:33:33,272 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-06-12 20:33:33,645 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-06-12 20:33:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:33,690 INFO L93 Difference]: Finished difference Result 861 states and 2544 transitions. [2021-06-12 20:33:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:33:33,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:33,692 INFO L225 Difference]: With dead ends: 861 [2021-06-12 20:33:33,692 INFO L226 Difference]: Without dead ends: 831 [2021-06-12 20:33:33,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4488.7ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:33:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-06-12 20:33:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 464. [2021-06-12 20:33:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1900647948164145) internal successors, (1477), 463 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1477 transitions. [2021-06-12 20:33:33,698 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1477 transitions. Word has length 20 [2021-06-12 20:33:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:33,698 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1477 transitions. [2021-06-12 20:33:33,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1477 transitions. [2021-06-12 20:33:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:33,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:33,698 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:33,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11387,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:33,899 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash -660249364, now seen corresponding path program 80 times [2021-06-12 20:33:33,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:33,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467351120] [2021-06-12 20:33:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:34,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:34,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467351120] [2021-06-12 20:33:34,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467351120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:34,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759009268] [2021-06-12 20:33:34,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:34,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:33:34,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:34,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:33:34,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:34,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:34,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:34,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:34,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:34,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:34,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:34,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:34,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:34,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:34,621 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:34,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:34,626 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:34,953 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-12 20:33:34,953 INFO L628 ElimStorePlain]: treesize reduction 465, result has 44.6 percent of original size [2021-06-12 20:33:34,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:33:34,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:34,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:34,964 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:34,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:34,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:34,969 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,205 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-12 20:33:35,206 INFO L628 ElimStorePlain]: treesize reduction 30, result has 90.7 percent of original size [2021-06-12 20:33:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:35,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:33:35,211 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:35,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:35,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:35,216 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:35,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:35,220 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,430 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-12 20:33:35,431 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-12 20:33:35,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:33:35,436 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:241 [2021-06-12 20:33:35,745 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1649, v_prenex_1651, array_6, v_prenex_1653, v_prenex_1655, v_prenex_1657], 1=[v_prenex_1648, array_0, v_prenex_1650, v_prenex_1652, v_prenex_1654, v_prenex_1656]} [2021-06-12 20:33:35,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:35,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:35,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:35,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:35,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:35,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:35,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:35,791 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:36,193 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2021-06-12 20:33:36,193 INFO L628 ElimStorePlain]: treesize reduction 1247, result has 17.3 percent of original size [2021-06-12 20:33:36,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:36,199 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:36,309 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:33:36,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:36,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:33:36,314 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:36,422 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:33:36,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:36,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:36,427 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:36,537 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 20:33:36,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:36,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:33:36,542 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:36,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:36,547 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:36,724 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-12 20:33:36,725 INFO L628 ElimStorePlain]: treesize reduction 27, result has 87.8 percent of original size [2021-06-12 20:33:36,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:36,729 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:36,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:36,814 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1648 vanished before elimination [2021-06-12 20:33:36,814 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:33:36,814 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1650 vanished before elimination [2021-06-12 20:33:36,814 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1652 vanished before elimination [2021-06-12 20:33:36,814 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1654 vanished before elimination [2021-06-12 20:33:36,814 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1656 vanished before elimination [2021-06-12 20:33:36,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:33:36,816 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1703, output treesize:140 [2021-06-12 20:33:36,954 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:33:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:37,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759009268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:37,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:37,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:33:37,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844107770] [2021-06-12 20:33:37,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:33:37,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:33:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:33:37,241 INFO L87 Difference]: Start difference. First operand 464 states and 1477 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:38,043 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 126 [2021-06-12 20:33:38,277 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-12 20:33:38,762 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-12 20:33:39,234 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-06-12 20:33:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:39,267 INFO L93 Difference]: Finished difference Result 759 states and 2279 transitions. [2021-06-12 20:33:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:33:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:39,269 INFO L225 Difference]: With dead ends: 759 [2021-06-12 20:33:39,269 INFO L226 Difference]: Without dead ends: 744 [2021-06-12 20:33:39,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2363.3ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:33:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-12 20:33:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 465. [2021-06-12 20:33:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.1961206896551726) internal successors, (1483), 464 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1483 transitions. [2021-06-12 20:33:39,274 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1483 transitions. Word has length 20 [2021-06-12 20:33:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:39,274 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1483 transitions. [2021-06-12 20:33:39,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1483 transitions. [2021-06-12 20:33:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:39,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:39,275 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:39,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11534 [2021-06-12 20:33:39,491 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:39,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1547446544, now seen corresponding path program 81 times [2021-06-12 20:33:39,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:39,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050323145] [2021-06-12 20:33:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:39,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:39,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050323145] [2021-06-12 20:33:39,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050323145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:39,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894333089] [2021-06-12 20:33:39,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:39,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:33:39,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:33:39,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:40,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:40,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:40,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:40,570 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2021-06-12 20:33:40,570 INFO L628 ElimStorePlain]: treesize reduction 218, result has 65.2 percent of original size [2021-06-12 20:33:40,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:40,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:40,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:40,748 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-12 20:33:40,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:40,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:40,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:40,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:33:40,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:40,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:40,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:40,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:40,924 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:33:40,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:40,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:40,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:40,930 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,086 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:33:41,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:41,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:41,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:41,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:33:41,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:41,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:41,099 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,362 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2021-06-12 20:33:41,362 INFO L628 ElimStorePlain]: treesize reduction 33, result has 90.0 percent of original size [2021-06-12 20:33:41,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:41,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:41,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:33:41,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:41,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:41,373 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,495 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 20:33:41,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:41,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:33:41,502 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:633, output treesize:276 [2021-06-12 20:33:41,720 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-06-12 20:33:41,914 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1680, array_6, v_prenex_1672, v_prenex_1674, v_prenex_1676, v_prenex_1678], 1=[array_0, v_prenex_1671, v_prenex_1673, v_prenex_1675, v_prenex_1677, v_prenex_1679]} [2021-06-12 20:33:41,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:41,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:41,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:41,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:41,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:41,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:41,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:33:41,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:42,452 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2021-06-12 20:33:42,453 INFO L628 ElimStorePlain]: treesize reduction 1400, result has 17.4 percent of original size [2021-06-12 20:33:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:33:42,459 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:42,584 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:33:42,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:42,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:33:42,590 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:42,712 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 20:33:42,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:42,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:42,718 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:42,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:42,723 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:42,825 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 20:33:42,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:42,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:42,830 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:42,931 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:33:42,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:42,936 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 7 treesize of output 5 [2021-06-12 20:33:42,937 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:43,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:43,035 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:33:43,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1671 vanished before elimination [2021-06-12 20:33:43,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1673 vanished before elimination [2021-06-12 20:33:43,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1675 vanished before elimination [2021-06-12 20:33:43,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1677 vanished before elimination [2021-06-12 20:33:43,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1679 vanished before elimination [2021-06-12 20:33:43,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:33:43,038 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1817, output treesize:194 [2021-06-12 20:33:43,205 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:33:43,433 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-06-12 20:33:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:43,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894333089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:43,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:43,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:33:43,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169051694] [2021-06-12 20:33:43,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:33:43,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:43,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:33:43,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:33:43,614 INFO L87 Difference]: Start difference. First operand 465 states and 1483 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:44,095 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-06-12 20:33:44,506 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 133 [2021-06-12 20:33:44,783 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-12 20:33:44,994 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2021-06-12 20:33:45,201 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 20:33:45,583 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-06-12 20:33:45,983 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-12 20:33:46,389 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2021-06-12 20:33:46,822 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-06-12 20:33:47,265 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-06-12 20:33:47,721 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2021-06-12 20:33:47,863 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-12 20:33:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:47,927 INFO L93 Difference]: Finished difference Result 1025 states and 2941 transitions. [2021-06-12 20:33:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:33:47,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:47,928 INFO L225 Difference]: With dead ends: 1025 [2021-06-12 20:33:47,928 INFO L226 Difference]: Without dead ends: 953 [2021-06-12 20:33:47,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 4767.0ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:33:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-12 20:33:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 469. [2021-06-12 20:33:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.2072649572649574) internal successors, (1501), 468 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1501 transitions. [2021-06-12 20:33:47,935 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1501 transitions. Word has length 20 [2021-06-12 20:33:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:47,935 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1501 transitions. [2021-06-12 20:33:47,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1501 transitions. [2021-06-12 20:33:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:47,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:47,936 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:48,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11691,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:48,136 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash 360320496, now seen corresponding path program 82 times [2021-06-12 20:33:48,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:48,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413930748] [2021-06-12 20:33:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:48,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:48,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413930748] [2021-06-12 20:33:48,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413930748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:48,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870364834] [2021-06-12 20:33:48,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:48,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:33:48,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:33:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:48,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:48,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:48,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:49,235 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-06-12 20:33:49,236 INFO L628 ElimStorePlain]: treesize reduction 195, result has 68.8 percent of original size [2021-06-12 20:33:49,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:49,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:49,420 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 20:33:49,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:49,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:49,604 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-12 20:33:49,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:49,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:49,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:49,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:33:49,616 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:49,787 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:33:49,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:49,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:49,794 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:49,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:49,799 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:49,932 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 20:33:49,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:49,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:33:49,942 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:49,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:33:49,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:33:49,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:50,071 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:33:50,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:50,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:33:50,078 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:633, output treesize:283 [2021-06-12 20:33:50,310 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2021-06-12 20:33:50,520 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1703, v_prenex_1695, array_6, v_prenex_1697, v_prenex_1699, v_prenex_1701], 1=[v_prenex_1702, array_0, v_prenex_1694, v_prenex_1696, v_prenex_1698, v_prenex_1700]} [2021-06-12 20:33:50,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:50,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:50,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:50,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:50,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:50,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:50,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:50,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:50,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:50,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:50,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:33:50,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:50,988 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 99 [2021-06-12 20:33:50,989 INFO L628 ElimStorePlain]: treesize reduction 1361, result has 15.9 percent of original size [2021-06-12 20:33:50,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:50,995 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:51,104 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:33:51,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:51,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:51,110 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:51,218 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 20:33:51,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:51,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:33:51,225 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:51,328 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:33:51,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:51,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:33:51,334 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:51,441 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 20:33:51,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:51,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:33:51,447 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:51,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:33:51,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1702 vanished before elimination [2021-06-12 20:33:51,546 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:33:51,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1694 vanished before elimination [2021-06-12 20:33:51,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1696 vanished before elimination [2021-06-12 20:33:51,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1698 vanished before elimination [2021-06-12 20:33:51,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1700 vanished before elimination [2021-06-12 20:33:51,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:33:51,549 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1859, output treesize:194 [2021-06-12 20:33:51,719 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:33:51,883 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 20:33:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:52,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870364834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:52,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:52,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:33:52,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922599926] [2021-06-12 20:33:52,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:33:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:33:52,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:33:52,110 INFO L87 Difference]: Start difference. First operand 469 states and 1501 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:52,956 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 131 [2021-06-12 20:33:53,219 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-06-12 20:33:53,880 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-06-12 20:33:54,582 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2021-06-12 20:33:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:54,614 INFO L93 Difference]: Finished difference Result 778 states and 2338 transitions. [2021-06-12 20:33:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:33:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:54,615 INFO L225 Difference]: With dead ends: 778 [2021-06-12 20:33:54,615 INFO L226 Difference]: Without dead ends: 763 [2021-06-12 20:33:54,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3055.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:33:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-12 20:33:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 467. [2021-06-12 20:33:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1952789699570814) internal successors, (1489), 466 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1489 transitions. [2021-06-12 20:33:54,621 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1489 transitions. Word has length 20 [2021-06-12 20:33:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:54,621 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1489 transitions. [2021-06-12 20:33:54,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1489 transitions. [2021-06-12 20:33:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:54,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:54,622 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:54,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11812 [2021-06-12 20:33:54,822 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1393009026, now seen corresponding path program 83 times [2021-06-12 20:33:54,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:54,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158346666] [2021-06-12 20:33:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:54,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:54,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158346666] [2021-06-12 20:33:54,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158346666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:54,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847176794] [2021-06-12 20:33:54,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:55,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:33:55,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:33:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:55,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:33:55,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:33:55,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:55,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:55,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:55,214 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:55,219 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:55,224 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:33:55,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:55,234 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:33:55,239 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:55,244 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:33:55,249 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:55,254 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:55,258 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:33:55,263 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:33:55,268 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:55,272 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:55,277 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:55,282 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:33:55,286 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:33:55,291 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:55,296 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:33:55,301 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:33:55,306 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:55,311 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:55,315 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:55,320 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:55,324 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:55,329 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:33:55,334 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:55,338 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:33:55,343 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:33:55,347 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:55,351 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:33:55,356 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:33:55,360 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:33:55,551 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-12 20:33:55,551 INFO L628 ElimStorePlain]: treesize reduction 447, result has 32.0 percent of original size [2021-06-12 20:33:55,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:33:55,553 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1981, output treesize:210 [2021-06-12 20:33:55,902 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-12 20:33:56,083 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-12 20:33:56,241 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:33:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:56,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847176794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:56,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:56,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:33:56,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759251404] [2021-06-12 20:33:56,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:33:56,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:33:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:33:56,321 INFO L87 Difference]: Start difference. First operand 467 states and 1489 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:57,102 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-12 20:33:57,633 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2021-06-12 20:33:58,014 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-12 20:33:58,159 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-12 20:33:58,428 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 20:33:58,652 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-12 20:33:58,930 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-06-12 20:33:59,349 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-12 20:33:59,710 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 20:33:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:59,761 INFO L93 Difference]: Finished difference Result 808 states and 2389 transitions. [2021-06-12 20:33:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:33:59,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:33:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:59,762 INFO L225 Difference]: With dead ends: 808 [2021-06-12 20:33:59,762 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 20:33:59,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 3931.7ms TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:33:59,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 20:33:59,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 467. [2021-06-12 20:33:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1952789699570814) internal successors, (1489), 466 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1489 transitions. [2021-06-12 20:33:59,767 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1489 transitions. Word has length 20 [2021-06-12 20:33:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:59,767 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1489 transitions. [2021-06-12 20:33:59,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:59,767 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1489 transitions. [2021-06-12 20:33:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:33:59,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:59,768 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:59,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11946,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:59,968 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1689017916, now seen corresponding path program 84 times [2021-06-12 20:33:59,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:59,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267970912] [2021-06-12 20:33:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:00,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:00,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267970912] [2021-06-12 20:34:00,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267970912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:00,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570550794] [2021-06-12 20:34:00,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:00,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:34:00,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:34:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:00,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:00,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:00,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:00,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:00,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:00,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:00,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:00,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:00,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:00,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:00,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:00,934 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-12 20:34:00,934 INFO L628 ElimStorePlain]: treesize reduction 405, result has 45.9 percent of original size [2021-06-12 20:34:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:00,940 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:00,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:00,945 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:00,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:00,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:34:00,950 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:01,197 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-12 20:34:01,198 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-12 20:34:01,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:01,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:01,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:34:01,203 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:01,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:01,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:01,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:01,208 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:01,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:01,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:01,212 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:01,331 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-12 20:34:01,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:01,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:34:01,338 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:1003, output treesize:272 [2021-06-12 20:34:01,483 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 20:34:01,752 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2021-06-12 20:34:01,946 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1715, v_prenex_1717, v_prenex_1719, array_6, v_prenex_1721, v_prenex_1723], 1=[v_prenex_1714, v_prenex_1716, array_0, v_prenex_1718, v_prenex_1720, v_prenex_1722]} [2021-06-12 20:34:01,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:34:01,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:01,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:01,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:01,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:01,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:01,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:01,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:01,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:01,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:01,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:34:01,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:02,394 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 92 [2021-06-12 20:34:02,395 INFO L628 ElimStorePlain]: treesize reduction 1479, result has 15.0 percent of original size [2021-06-12 20:34:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:02,401 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:02,502 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 20:34:02,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:02,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:02,508 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:02,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:02,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:02,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:02,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:02,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:34:02,717 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:02,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:02,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:34:02,818 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:02,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:02,914 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1714 vanished before elimination [2021-06-12 20:34:02,914 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1716 vanished before elimination [2021-06-12 20:34:02,915 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:34:02,915 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1718 vanished before elimination [2021-06-12 20:34:02,915 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1720 vanished before elimination [2021-06-12 20:34:02,915 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1722 vanished before elimination [2021-06-12 20:34:02,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:34:02,917 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1893, output treesize:168 [2021-06-12 20:34:03,076 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-12 20:34:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:03,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570550794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:03,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:03,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:34:03,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645501476] [2021-06-12 20:34:03,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:34:03,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:03,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:34:03,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:34:03,300 INFO L87 Difference]: Start difference. First operand 467 states and 1489 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:03,751 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 20:34:04,178 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 132 [2021-06-12 20:34:04,793 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 139 [2021-06-12 20:34:05,384 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 20:34:05,571 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-12 20:34:05,907 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-12 20:34:06,118 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-12 20:34:06,453 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-12 20:34:06,859 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-06-12 20:34:07,090 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-12 20:34:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:07,146 INFO L93 Difference]: Finished difference Result 830 states and 2445 transitions. [2021-06-12 20:34:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:34:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:07,148 INFO L225 Difference]: With dead ends: 830 [2021-06-12 20:34:07,148 INFO L226 Difference]: Without dead ends: 785 [2021-06-12 20:34:07,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 4234.3ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:34:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-06-12 20:34:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 463. [2021-06-12 20:34:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.186147186147186) internal successors, (1472), 462 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1472 transitions. [2021-06-12 20:34:07,154 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1472 transitions. Word has length 20 [2021-06-12 20:34:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:07,154 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1472 transitions. [2021-06-12 20:34:07,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1472 transitions. [2021-06-12 20:34:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:07,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:07,154 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:07,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11991 [2021-06-12 20:34:07,355 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:07,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1517900006, now seen corresponding path program 85 times [2021-06-12 20:34:07,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:07,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660089223] [2021-06-12 20:34:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:07,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:07,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660089223] [2021-06-12 20:34:07,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660089223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:07,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229621255] [2021-06-12 20:34:07,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:34:07,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:07,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:07,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:07,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:07,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:07,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:07,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:07,842 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:07,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:07,852 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:07,857 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:34:07,862 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:07,867 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:07,872 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:07,876 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:07,881 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:07,886 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:07,890 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:34:07,895 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:07,900 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:34:07,905 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:07,909 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:07,914 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:07,919 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:07,923 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:07,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:07,927 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:08,119 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-12 20:34:08,119 INFO L628 ElimStorePlain]: treesize reduction 276, result has 46.6 percent of original size [2021-06-12 20:34:08,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-12 20:34:08,130 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 2 variables, input treesize:1135, output treesize:229 [2021-06-12 20:34:08,427 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2021-06-12 20:34:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:08,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:08,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:08,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:08,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:08,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:08,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:08,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:08,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:08,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:08,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:08,823 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:09,170 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 91 [2021-06-12 20:34:09,170 INFO L628 ElimStorePlain]: treesize reduction 1142, result has 16.3 percent of original size [2021-06-12 20:34:09,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1735 vanished before elimination [2021-06-12 20:34:09,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:09,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:09,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:09,182 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:09,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:09,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:34:09,258 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:09,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:09,328 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1737 vanished before elimination [2021-06-12 20:34:09,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:09,333 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:09,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:09,397 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:34:09,397 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1740 vanished before elimination [2021-06-12 20:34:09,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:09,402 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:09,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:09,469 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1731 vanished before elimination [2021-06-12 20:34:09,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:09,474 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:09,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:09,533 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1733 vanished before elimination [2021-06-12 20:34:09,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:34:09,535 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1507, output treesize:113 [2021-06-12 20:34:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:09,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229621255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:09,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:09,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:34:09,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320645892] [2021-06-12 20:34:09,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:34:09,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:34:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:34:09,701 INFO L87 Difference]: Start difference. First operand 463 states and 1472 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:10,003 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-12 20:34:10,257 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2021-06-12 20:34:10,596 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2021-06-12 20:34:10,995 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 137 [2021-06-12 20:34:11,414 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 146 [2021-06-12 20:34:11,871 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 152 [2021-06-12 20:34:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:11,903 INFO L93 Difference]: Finished difference Result 610 states and 1836 transitions. [2021-06-12 20:34:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:34:11,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:11,905 INFO L225 Difference]: With dead ends: 610 [2021-06-12 20:34:11,905 INFO L226 Difference]: Without dead ends: 548 [2021-06-12 20:34:11,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2611.1ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:34:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-12 20:34:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 477. [2021-06-12 20:34:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.176470588235294) internal successors, (1512), 476 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1512 transitions. [2021-06-12 20:34:11,909 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1512 transitions. Word has length 20 [2021-06-12 20:34:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:11,910 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1512 transitions. [2021-06-12 20:34:11,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1512 transitions. [2021-06-12 20:34:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:11,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:11,910 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:12,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12118,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:12,117 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:12,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1120982352, now seen corresponding path program 86 times [2021-06-12 20:34:12,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:12,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957430986] [2021-06-12 20:34:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:12,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957430986] [2021-06-12 20:34:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957430986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432745196] [2021-06-12 20:34:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:12,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:12,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:12,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:12,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:12,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:12,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:12,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:12,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:12,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:12,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:34:12,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:12,561 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:12,565 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:12,569 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:34:12,573 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:12,577 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:12,581 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:12,585 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:34:12,589 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:12,593 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:12,596 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:12,722 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-12 20:34:12,722 INFO L628 ElimStorePlain]: treesize reduction 125, result has 58.1 percent of original size [2021-06-12 20:34:12,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:34:12,727 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 2 variables, input treesize:715, output treesize:161 [2021-06-12 20:34:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:13,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432745196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:13,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:13,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:34:13,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094630676] [2021-06-12 20:34:13,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:34:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:13,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:34:13,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:34:13,405 INFO L87 Difference]: Start difference. First operand 477 states and 1512 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:14,042 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2021-06-12 20:34:14,340 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 114 [2021-06-12 20:34:14,703 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2021-06-12 20:34:15,118 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 117 [2021-06-12 20:34:15,502 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 129 [2021-06-12 20:34:15,657 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-12 20:34:16,046 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-06-12 20:34:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:16,059 INFO L93 Difference]: Finished difference Result 668 states and 1981 transitions. [2021-06-12 20:34:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:34:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:16,061 INFO L225 Difference]: With dead ends: 668 [2021-06-12 20:34:16,061 INFO L226 Difference]: Without dead ends: 638 [2021-06-12 20:34:16,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2924.0ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:34:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-12 20:34:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 477. [2021-06-12 20:34:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.176470588235294) internal successors, (1512), 476 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1512 transitions. [2021-06-12 20:34:16,066 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1512 transitions. Word has length 20 [2021-06-12 20:34:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:16,066 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1512 transitions. [2021-06-12 20:34:16,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1512 transitions. [2021-06-12 20:34:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:16,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:16,067 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:16,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12252,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:16,267 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash -577738036, now seen corresponding path program 87 times [2021-06-12 20:34:16,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:16,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637844508] [2021-06-12 20:34:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:16,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:16,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637844508] [2021-06-12 20:34:16,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637844508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:16,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555651321] [2021-06-12 20:34:16,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:16,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:34:16,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:34:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:16,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:16,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:16,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:16,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:16,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:16,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:16,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:16,755 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:16,761 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:16,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:16,770 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:16,775 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:16,780 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:16,784 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:16,789 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:16,794 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:16,799 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:16,803 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:16,808 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:16,813 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:16,818 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:16,823 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:16,828 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:16,832 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:16,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:34:16,836 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:17,062 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-12 20:34:17,062 INFO L628 ElimStorePlain]: treesize reduction 272, result has 50.4 percent of original size [2021-06-12 20:34:17,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-12 20:34:17,069 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 2 variables, input treesize:1207, output treesize:264 [2021-06-12 20:34:17,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:17,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:17,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:17,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:17,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:17,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:17,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:17,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:17,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:17,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:17,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:17,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:17,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:17,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:17,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:17,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:17,649 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:18,180 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 117 [2021-06-12 20:34:18,181 INFO L628 ElimStorePlain]: treesize reduction 1563, result has 16.6 percent of original size [2021-06-12 20:34:18,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:34:18,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:18,321 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 20:34:18,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:18,321 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1760 vanished before elimination [2021-06-12 20:34:18,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:18,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:18,458 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 20:34:18,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:18,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:34:18,466 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:18,592 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 20:34:18,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:18,592 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1762 vanished before elimination [2021-06-12 20:34:18,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:18,599 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:18,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:18,604 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:18,710 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 20:34:18,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:18,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1753 vanished before elimination [2021-06-12 20:34:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:34:18,717 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:18,822 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 20:34:18,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:18,823 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1755 vanished before elimination [2021-06-12 20:34:18,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:18,828 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:18,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:18,928 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1757 vanished before elimination [2021-06-12 20:34:18,928 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1759 vanished before elimination [2021-06-12 20:34:18,928 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:34:18,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:34:18,931 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 21 variables, input treesize:2091, output treesize:195 [2021-06-12 20:34:19,098 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-12 20:34:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:19,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555651321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:19,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:19,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:34:19,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652513803] [2021-06-12 20:34:19,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:34:19,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:19,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:34:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:34:19,310 INFO L87 Difference]: Start difference. First operand 477 states and 1512 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:19,856 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 127 [2021-06-12 20:34:20,179 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2021-06-12 20:34:20,704 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 145 [2021-06-12 20:34:21,105 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-12 20:34:21,747 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 157 [2021-06-12 20:34:22,185 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 153 [2021-06-12 20:34:22,854 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-12 20:34:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:22,892 INFO L93 Difference]: Finished difference Result 668 states and 1969 transitions. [2021-06-12 20:34:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:34:22,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:22,893 INFO L225 Difference]: With dead ends: 668 [2021-06-12 20:34:22,893 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:34:22,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3996.4ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:34:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:34:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 480. [2021-06-12 20:34:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1795407098121085) internal successors, (1523), 479 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1523 transitions. [2021-06-12 20:34:22,898 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1523 transitions. Word has length 20 [2021-06-12 20:34:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:22,899 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1523 transitions. [2021-06-12 20:34:22,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1523 transitions. [2021-06-12 20:34:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:22,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:22,899 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:23,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12385,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:23,100 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:23,100 INFO L82 PathProgramCache]: Analyzing trace with hash -750985728, now seen corresponding path program 88 times [2021-06-12 20:34:23,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:23,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69672315] [2021-06-12 20:34:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:23,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:23,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69672315] [2021-06-12 20:34:23,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69672315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:23,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818485831] [2021-06-12 20:34:23,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:23,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:34:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:23,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:34:23,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:23,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:23,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:23,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:34:23,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:23,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:23,652 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:23,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:23,662 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:23,667 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:23,672 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:23,677 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:23,682 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:23,686 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:23,691 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:23,696 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:23,700 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:23,705 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:23,710 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:23,714 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:23,719 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:23,724 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:23,728 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:23,732 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:23,953 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-12 20:34:23,953 INFO L628 ElimStorePlain]: treesize reduction 323, result has 45.4 percent of original size [2021-06-12 20:34:23,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-12 20:34:23,960 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 2 variables, input treesize:1207, output treesize:257 [2021-06-12 20:34:24,454 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2021-06-12 20:34:24,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:24,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:24,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:24,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:24,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:24,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:24,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:24,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:24,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:24,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:24,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:24,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:24,748 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:24,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:24,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:24,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:25,151 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 102 [2021-06-12 20:34:25,151 INFO L628 ElimStorePlain]: treesize reduction 1115, result has 19.8 percent of original size [2021-06-12 20:34:25,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:25,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:25,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:34:25,158 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:25,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:25,164 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:25,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:25,260 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1780 vanished before elimination [2021-06-12 20:34:25,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:34:25,266 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:25,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:25,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:34:25,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:25,419 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-06-12 20:34:25,420 INFO L628 ElimStorePlain]: treesize reduction 24, result has 88.6 percent of original size [2021-06-12 20:34:25,420 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:34:25,420 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1771 vanished before elimination [2021-06-12 20:34:25,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:25,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:25,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:25,494 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1773 vanished before elimination [2021-06-12 20:34:25,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:25,499 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:25,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:25,566 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1775 vanished before elimination [2021-06-12 20:34:25,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:25,571 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:25,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:25,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1777 vanished before elimination [2021-06-12 20:34:25,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:34:25,637 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 18 variables, input treesize:1597, output treesize:130 [2021-06-12 20:34:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:25,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818485831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:25,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:25,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:34:25,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273614954] [2021-06-12 20:34:25,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:34:25,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:25,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:34:25,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:34:25,822 INFO L87 Difference]: Start difference. First operand 480 states and 1523 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:26,358 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2021-06-12 20:34:26,780 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 129 [2021-06-12 20:34:27,357 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 147 [2021-06-12 20:34:27,749 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2021-06-12 20:34:28,150 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 158 [2021-06-12 20:34:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:28,182 INFO L93 Difference]: Finished difference Result 611 states and 1843 transitions. [2021-06-12 20:34:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:34:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:28,183 INFO L225 Difference]: With dead ends: 611 [2021-06-12 20:34:28,183 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 20:34:28,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2869.1ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:34:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 20:34:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 472. [2021-06-12 20:34:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1825902335456475) internal successors, (1499), 471 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1499 transitions. [2021-06-12 20:34:28,188 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1499 transitions. Word has length 20 [2021-06-12 20:34:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:28,188 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1499 transitions. [2021-06-12 20:34:28,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1499 transitions. [2021-06-12 20:34:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:28,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:28,189 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:28,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12532 [2021-06-12 20:34:28,393 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1200559462, now seen corresponding path program 89 times [2021-06-12 20:34:28,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:28,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094653354] [2021-06-12 20:34:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:28,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:28,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094653354] [2021-06-12 20:34:28,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094653354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:28,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268158129] [2021-06-12 20:34:28,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:28,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:28,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:28,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:34:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:28,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:28,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:34:28,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:28,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:28,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:28,920 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:28,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:28,932 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:28,938 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:28,944 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:28,950 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:34:28,956 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:28,962 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:34:28,969 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:28,975 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:28,981 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:28,987 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:28,993 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:28,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:28,998 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:29,005 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:29,010 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:29,016 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,022 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,028 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:29,034 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,040 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,046 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:29,052 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:29,058 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,064 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:29,070 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:29,075 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:29,081 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,086 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,092 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:29,098 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,104 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:29,110 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:29,115 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,121 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,127 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,133 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:29,138 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:29,144 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,150 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,156 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,162 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:29,167 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,173 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,178 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:34:29,188 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:29,194 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,199 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:29,204 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,210 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:29,215 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,221 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,226 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:29,231 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,236 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:29,242 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:34:29,247 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:34:29,252 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:29,257 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:29,262 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:29,267 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:29,453 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2021-06-12 20:34:29,453 INFO L628 ElimStorePlain]: treesize reduction 863, result has 15.7 percent of original size [2021-06-12 20:34:29,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:34:29,455 INFO L247 ElimStorePlain]: Needed 67 recursive calls to eliminate 1 variables, input treesize:2875, output treesize:161 [2021-06-12 20:34:29,882 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:34:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:29,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268158129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:29,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:29,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:34:29,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469622797] [2021-06-12 20:34:29,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:34:29,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:34:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:34:29,958 INFO L87 Difference]: Start difference. First operand 472 states and 1499 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,340 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-12 20:34:30,629 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-12 20:34:31,174 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 87 [2021-06-12 20:34:31,707 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-06-12 20:34:31,849 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-12 20:34:32,293 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-12 20:34:32,491 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-12 20:34:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:32,609 INFO L93 Difference]: Finished difference Result 586 states and 1806 transitions. [2021-06-12 20:34:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:34:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:32,610 INFO L225 Difference]: With dead ends: 586 [2021-06-12 20:34:32,610 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:34:32,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3047.8ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:34:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:34:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 475. [2021-06-12 20:34:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.179324894514768) internal successors, (1507), 474 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1507 transitions. [2021-06-12 20:34:32,615 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1507 transitions. Word has length 20 [2021-06-12 20:34:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:32,615 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1507 transitions. [2021-06-12 20:34:32,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1507 transitions. [2021-06-12 20:34:32,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:32,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:32,616 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:32,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12707,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:32,816 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:32,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1679844138, now seen corresponding path program 90 times [2021-06-12 20:34:32,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:32,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787604170] [2021-06-12 20:34:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:32,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:32,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787604170] [2021-06-12 20:34:32,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787604170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:32,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251306442] [2021-06-12 20:34:32,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:33,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:34:33,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:33,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:34:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:33,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:33,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:33,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:33,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:33,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:33,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:33,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:33,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:33,736 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,126 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2021-06-12 20:34:34,127 INFO L628 ElimStorePlain]: treesize reduction 570, result has 42.1 percent of original size [2021-06-12 20:34:34,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:34,133 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:34,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:34,143 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,283 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 20:34:34,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:34,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:34,289 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:34,294 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:34,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,432 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 20:34:34,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:34,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:34,438 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:34,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:34,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:34,449 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,582 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 20:34:34,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:34,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 10 xjuncts. [2021-06-12 20:34:34,588 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1129, output treesize:286 [2021-06-12 20:34:34,809 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-06-12 20:34:34,973 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1794, array_6, v_prenex_1796], 1=[array_3, v_prenex_1793, v_prenex_1795]} [2021-06-12 20:34:34,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:34,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:34,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:34,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:34,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:35,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:35,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:35,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:35,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:35,277 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2021-06-12 20:34:35,278 INFO L628 ElimStorePlain]: treesize reduction 683, result has 24.8 percent of original size [2021-06-12 20:34:35,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:35,282 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:35,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:35,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:35,375 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:35,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:35,465 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-12 20:34:35,465 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1793 vanished before elimination [2021-06-12 20:34:35,465 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1795 vanished before elimination [2021-06-12 20:34:35,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 20:34:35,467 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:1128, output treesize:179 [2021-06-12 20:34:35,609 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-12 20:34:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:35,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251306442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:35,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:35,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:34:35,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665779206] [2021-06-12 20:34:35,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:34:35,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:35,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:34:35,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:34:35,765 INFO L87 Difference]: Start difference. First operand 475 states and 1507 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:36,174 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-12 20:34:36,465 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2021-06-12 20:34:36,912 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 136 [2021-06-12 20:34:37,379 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2021-06-12 20:34:38,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:38,176 INFO L93 Difference]: Finished difference Result 688 states and 2017 transitions. [2021-06-12 20:34:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:34:38,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:38,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:38,178 INFO L225 Difference]: With dead ends: 688 [2021-06-12 20:34:38,178 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 20:34:38,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2866.0ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:34:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 20:34:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 475. [2021-06-12 20:34:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.179324894514768) internal successors, (1507), 474 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1507 transitions. [2021-06-12 20:34:38,183 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1507 transitions. Word has length 20 [2021-06-12 20:34:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:38,183 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1507 transitions. [2021-06-12 20:34:38,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1507 transitions. [2021-06-12 20:34:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:38,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:38,184 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:38,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12779,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:38,384 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2079893356, now seen corresponding path program 91 times [2021-06-12 20:34:38,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:38,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681767594] [2021-06-12 20:34:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:38,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681767594] [2021-06-12 20:34:38,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681767594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730196882] [2021-06-12 20:34:38,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:38,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:34:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:38,952 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 30 treesize of output 22 [2021-06-12 20:34:38,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:34:38,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:38,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:38,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:38,972 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:38,977 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:38,982 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:34:38,987 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:38,992 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:38,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:39,002 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:39,007 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:39,011 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:39,016 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:39,020 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:39,025 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:39,030 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:39,035 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:39,040 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:39,044 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:39,049 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:39,054 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:39,059 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:39,063 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,283 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-12 20:34:39,283 INFO L628 ElimStorePlain]: treesize reduction 315, result has 45.3 percent of original size [2021-06-12 20:34:39,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-12 20:34:39,289 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 2 variables, input treesize:1207, output treesize:249 [2021-06-12 20:34:39,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:39,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:39,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:39,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:39,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:39,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:39,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:39,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:39,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:39,686 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,162 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 110 [2021-06-12 20:34:40,163 INFO L628 ElimStorePlain]: treesize reduction 1324, result has 18.7 percent of original size [2021-06-12 20:34:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:40,170 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,303 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 20:34:40,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:40,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:40,310 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:40,316 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,430 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:34:40,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:40,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:40,437 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,553 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:34:40,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:40,554 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1812 vanished before elimination [2021-06-12 20:34:40,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:34:40,559 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,669 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:34:40,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:40,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1814 vanished before elimination [2021-06-12 20:34:40,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1803 vanished before elimination [2021-06-12 20:34:40,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:40,675 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:40,679 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:40,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1805 vanished before elimination [2021-06-12 20:34:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:40,772 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:40,857 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1807 vanished before elimination [2021-06-12 20:34:40,857 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:34:40,858 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1809 vanished before elimination [2021-06-12 20:34:40,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:34:40,860 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 21 variables, input treesize:1869, output treesize:163 [2021-06-12 20:34:41,003 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-12 20:34:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:41,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730196882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:41,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:41,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:34:41,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952438386] [2021-06-12 20:34:41,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:34:41,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:41,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:34:41,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:34:41,159 INFO L87 Difference]: Start difference. First operand 475 states and 1507 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:41,470 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-12 20:34:41,671 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-12 20:34:41,945 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2021-06-12 20:34:42,488 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 20:34:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:42,543 INFO L93 Difference]: Finished difference Result 633 states and 1903 transitions. [2021-06-12 20:34:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:42,544 INFO L225 Difference]: With dead ends: 633 [2021-06-12 20:34:42,544 INFO L226 Difference]: Without dead ends: 603 [2021-06-12 20:34:42,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1688.7ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:34:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-06-12 20:34:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 475. [2021-06-12 20:34:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.179324894514768) internal successors, (1507), 474 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1507 transitions. [2021-06-12 20:34:42,553 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1507 transitions. Word has length 20 [2021-06-12 20:34:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:42,553 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1507 transitions. [2021-06-12 20:34:42,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1507 transitions. [2021-06-12 20:34:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:42,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:42,553 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:42,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12919 [2021-06-12 20:34:42,754 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:42,754 INFO L82 PathProgramCache]: Analyzing trace with hash 516353552, now seen corresponding path program 92 times [2021-06-12 20:34:42,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:42,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130727460] [2021-06-12 20:34:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:42,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:42,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130727460] [2021-06-12 20:34:42,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130727460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:42,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138474825] [2021-06-12 20:34:42,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:42,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:42,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:34:42,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:43,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:43,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:43,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:43,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:43,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:43,293 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:43,298 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:34:43,303 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:43,307 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:43,312 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:43,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:43,322 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:43,327 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:43,332 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:43,337 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:43,342 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:43,348 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:43,353 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:43,358 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:43,363 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:43,368 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:43,373 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:43,378 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:43,382 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:43,387 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:43,633 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-12 20:34:43,634 INFO L628 ElimStorePlain]: treesize reduction 285, result has 50.9 percent of original size [2021-06-12 20:34:43,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-12 20:34:43,640 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 2 variables, input treesize:1279, output treesize:283 [2021-06-12 20:34:44,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:44,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:44,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:44,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:44,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:34:44,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:44,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:44,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:44,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:44,134 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:44,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:44,145 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:44,669 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 111 [2021-06-12 20:34:44,670 INFO L628 ElimStorePlain]: treesize reduction 1623, result has 14.7 percent of original size [2021-06-12 20:34:44,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:44,677 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:44,790 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 20:34:44,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:44,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:44,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:44,907 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:34:44,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:44,914 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:45,022 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:34:45,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:45,023 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1832 vanished before elimination [2021-06-12 20:34:45,023 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1821 vanished before elimination [2021-06-12 20:34:45,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:45,029 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:45,135 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:34:45,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:45,135 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1823 vanished before elimination [2021-06-12 20:34:45,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:34:45,141 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:45,245 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 20:34:45,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:45,246 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1825 vanished before elimination [2021-06-12 20:34:45,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:34:45,251 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:45,354 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 20:34:45,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:45,354 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1827 vanished before elimination [2021-06-12 20:34:45,354 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1829 vanished before elimination [2021-06-12 20:34:45,354 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:34:45,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:34:45,358 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2043, output treesize:195 [2021-06-12 20:34:45,529 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-12 20:34:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:45,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138474825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:45,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:45,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:34:45,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392810407] [2021-06-12 20:34:45,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:34:45,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:34:45,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:34:45,740 INFO L87 Difference]: Start difference. First operand 475 states and 1507 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:46,072 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-12 20:34:46,295 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-12 20:34:46,612 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2021-06-12 20:34:47,064 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 20:34:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:47,103 INFO L93 Difference]: Finished difference Result 580 states and 1771 transitions. [2021-06-12 20:34:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:34:47,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:47,104 INFO L225 Difference]: With dead ends: 580 [2021-06-12 20:34:47,104 INFO L226 Difference]: Without dead ends: 558 [2021-06-12 20:34:47,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1758.5ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:34:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-12 20:34:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 478. [2021-06-12 20:34:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1823899371069184) internal successors, (1518), 477 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1518 transitions. [2021-06-12 20:34:47,109 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1518 transitions. Word has length 20 [2021-06-12 20:34:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:47,109 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1518 transitions. [2021-06-12 20:34:47,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1518 transitions. [2021-06-12 20:34:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:47,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:47,110 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:47,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13091 [2021-06-12 20:34:47,310 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash 343105860, now seen corresponding path program 93 times [2021-06-12 20:34:47,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:47,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452355305] [2021-06-12 20:34:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:47,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452355305] [2021-06-12 20:34:47,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452355305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462774257] [2021-06-12 20:34:47,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:47,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:34:47,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:34:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:48,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:48,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:48,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:48,711 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 132 [2021-06-12 20:34:48,712 INFO L628 ElimStorePlain]: treesize reduction 280, result has 64.7 percent of original size [2021-06-12 20:34:48,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:48,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:48,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:48,931 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-12 20:34:48,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:48,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:48,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:48,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:48,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:48,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:34:48,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,145 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-12 20:34:49,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:49,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:49,152 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:34:49,159 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,353 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-12 20:34:49,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:49,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:34:49,361 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:49,367 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,561 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 20:34:49,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:49,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:49,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:49,574 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,739 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-12 20:34:49,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:49,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:49,746 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,910 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 20:34:49,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:49,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:34:49,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,078 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:34:50,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:50,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 9 dim-0 vars, and 11 xjuncts. [2021-06-12 20:34:50,087 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:801, output treesize:361 [2021-06-12 20:34:50,333 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 102 [2021-06-12 20:34:50,556 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-06-12 20:34:50,778 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1856, v_prenex_1858, array_6, v_prenex_1854], 1=[v_prenex_1857, array_0, v_prenex_1853, v_prenex_1855]} [2021-06-12 20:34:50,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:50,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:50,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:50,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:50,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:50,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:50,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:51,070 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 73 [2021-06-12 20:34:51,070 INFO L628 ElimStorePlain]: treesize reduction 805, result has 20.5 percent of original size [2021-06-12 20:34:51,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:51,075 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:51,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:51,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:34:51,154 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:51,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:51,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:51,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:51,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:51,219 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:51,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:51,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1857 vanished before elimination [2021-06-12 20:34:51,274 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:34:51,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1853 vanished before elimination [2021-06-12 20:34:51,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1855 vanished before elimination [2021-06-12 20:34:51,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:34:51,276 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:1125, output treesize:122 [2021-06-12 20:34:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:51,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462774257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:51,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:51,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:34:51,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220751466] [2021-06-12 20:34:51,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:34:51,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:34:51,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:34:51,464 INFO L87 Difference]: Start difference. First operand 478 states and 1518 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:51,875 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-06-12 20:34:52,190 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 98 [2021-06-12 20:34:52,500 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2021-06-12 20:34:52,948 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 146 [2021-06-12 20:34:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:53,245 INFO L93 Difference]: Finished difference Result 619 states and 1871 transitions. [2021-06-12 20:34:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:34:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:34:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:53,246 INFO L225 Difference]: With dead ends: 619 [2021-06-12 20:34:53,246 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 20:34:53,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2334.4ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:34:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 20:34:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 481. [2021-06-12 20:34:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.1791666666666667) internal successors, (1526), 480 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1526 transitions. [2021-06-12 20:34:53,251 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1526 transitions. Word has length 20 [2021-06-12 20:34:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:53,251 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1526 transitions. [2021-06-12 20:34:53,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1526 transitions. [2021-06-12 20:34:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:34:53,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:53,252 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:53,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13268 [2021-06-12 20:34:53,468 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1134276060, now seen corresponding path program 94 times [2021-06-12 20:34:53,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:53,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915004928] [2021-06-12 20:34:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:53,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:53,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915004928] [2021-06-12 20:34:53,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915004928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:53,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440998213] [2021-06-12 20:34:53,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:53,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:53,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:34:53,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:53,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:53,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:53,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:53,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:53,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:34:53,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:53,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:34:53,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:54,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:54,008 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:54,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:34:54,020 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:54,025 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:54,031 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:54,036 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:34:54,042 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:54,048 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:54,053 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:54,058 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:54,064 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:54,070 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:54,075 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:34:54,081 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:54,086 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:54,092 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:34:54,097 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:54,102 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:54,108 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:54,113 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:54,118 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:54,123 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:54,129 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:54,134 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:34:54,139 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:54,144 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:34:54,149 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:34:54,154 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:34:54,159 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:34:54,164 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:34:54,168 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:54,403 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-12 20:34:54,403 INFO L628 ElimStorePlain]: treesize reduction 507, result has 33.0 percent of original size [2021-06-12 20:34:54,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:34:54,408 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 2 variables, input treesize:2161, output treesize:254 [2021-06-12 20:34:54,595 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 106 [2021-06-12 20:34:54,976 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 112 [2021-06-12 20:34:55,207 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2021-06-12 20:34:55,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:55,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:34:55,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:55,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:55,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:34:55,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:34:55,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,007 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 101 [2021-06-12 20:34:56,008 INFO L628 ElimStorePlain]: treesize reduction 1189, result has 17.5 percent of original size [2021-06-12 20:34:56,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:56,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,114 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 20:34:56,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:56,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:56,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:34:56,126 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:56,210 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1880 vanished before elimination [2021-06-12 20:34:56,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:56,216 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:56,298 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1881 vanished before elimination [2021-06-12 20:34:56,298 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:34:56,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:56,304 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:56,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:34:56,390 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:34:56,395 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,527 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-12 20:34:56,528 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.9 percent of original size [2021-06-12 20:34:56,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1874 vanished before elimination [2021-06-12 20:34:56,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1877 vanished before elimination [2021-06-12 20:34:56,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1876 vanished before elimination [2021-06-12 20:34:56,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:34:56,531 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 18 variables, input treesize:1549, output treesize:130 [2021-06-12 20:34:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:56,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440998213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:56,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:56,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:34:56,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945687653] [2021-06-12 20:34:56,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:34:56,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:34:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:34:56,725 INFO L87 Difference]: Start difference. First operand 481 states and 1526 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:57,159 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 126 [2021-06-12 20:34:57,685 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 173 [2021-06-12 20:34:58,633 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 191 [2021-06-12 20:34:59,656 WARN L205 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 195 [2021-06-12 20:35:00,783 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 241 DAG size of output: 208 [2021-06-12 20:35:00,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:00,949 INFO L93 Difference]: Finished difference Result 764 states and 2293 transitions. [2021-06-12 20:35:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:35:00,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:35:00,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:00,950 INFO L225 Difference]: With dead ends: 764 [2021-06-12 20:35:00,950 INFO L226 Difference]: Without dead ends: 724 [2021-06-12 20:35:00,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 4766.1ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:35:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-12 20:35:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 488. [2021-06-12 20:35:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.1806981519507187) internal successors, (1549), 487 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1549 transitions. [2021-06-12 20:35:00,956 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1549 transitions. Word has length 20 [2021-06-12 20:35:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:00,956 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1549 transitions. [2021-06-12 20:35:00,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1549 transitions. [2021-06-12 20:35:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:35:00,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:00,956 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:01,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13411 [2021-06-12 20:35:01,172 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1531193714, now seen corresponding path program 95 times [2021-06-12 20:35:01,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:01,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26682727] [2021-06-12 20:35:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:01,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26682727] [2021-06-12 20:35:01,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26682727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799304533] [2021-06-12 20:35:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:01,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:01,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:35:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:01,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:01,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:01,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:01,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:01,525 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:01,530 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:01,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:01,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:01,544 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:01,549 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:01,553 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:01,558 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:01,563 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:35:01,568 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:01,572 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:01,577 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:01,582 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:01,586 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:01,591 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:01,596 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:01,602 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:01,608 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:01,613 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:01,618 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:01,622 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:01,627 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:01,632 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:01,637 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:01,641 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:01,646 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:01,650 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:01,654 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:01,659 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:35:01,666 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:01,673 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:01,677 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,880 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-06-12 20:35:01,880 INFO L628 ElimStorePlain]: treesize reduction 394, result has 32.9 percent of original size [2021-06-12 20:35:01,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:35:01,882 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1873, output treesize:193 [2021-06-12 20:35:02,213 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-12 20:35:02,506 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-12 20:35:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:02,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799304533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:02,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:02,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:35:02,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552681829] [2021-06-12 20:35:02,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:35:02,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:02,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:35:02,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:02,676 INFO L87 Difference]: Start difference. First operand 488 states and 1549 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:02,996 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-12 20:35:03,296 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-12 20:35:03,677 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-12 20:35:04,139 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-06-12 20:35:04,637 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-06-12 20:35:04,964 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-12 20:35:05,341 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2021-06-12 20:35:05,876 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 93 [2021-06-12 20:35:06,245 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-06-12 20:35:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:06,289 INFO L93 Difference]: Finished difference Result 966 states and 2801 transitions. [2021-06-12 20:35:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:35:06,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:35:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:06,291 INFO L225 Difference]: With dead ends: 966 [2021-06-12 20:35:06,291 INFO L226 Difference]: Without dead ends: 894 [2021-06-12 20:35:06,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4076.2ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:35:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-06-12 20:35:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 489. [2021-06-12 20:35:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.19672131147541) internal successors, (1560), 488 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1560 transitions. [2021-06-12 20:35:06,297 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1560 transitions. Word has length 20 [2021-06-12 20:35:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:06,297 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1560 transitions. [2021-06-12 20:35:06,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:06,297 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1560 transitions. [2021-06-12 20:35:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:35:06,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:06,298 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:06,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13593,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:06,501 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1070173664, now seen corresponding path program 96 times [2021-06-12 20:35:06,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:06,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16425341] [2021-06-12 20:35:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:06,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16425341] [2021-06-12 20:35:06,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16425341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:06,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428842074] [2021-06-12 20:35:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:06,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:35:06,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:35:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:07,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:07,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:07,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:07,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:07,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:07,026 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:07,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:07,037 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:07,042 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:07,048 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:07,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:35:07,059 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:07,064 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:07,075 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:07,080 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:07,086 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:07,091 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:07,097 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:07,102 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:07,107 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:07,113 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:07,118 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:07,123 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:07,128 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:07,134 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:07,139 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:07,144 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:07,149 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:07,154 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:07,159 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:07,164 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:07,169 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:07,174 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:35:07,179 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:07,184 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:07,189 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:07,193 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:07,427 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-12 20:35:07,428 INFO L628 ElimStorePlain]: treesize reduction 507, result has 33.0 percent of original size [2021-06-12 20:35:07,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:35:07,433 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 2 variables, input treesize:2161, output treesize:254 [2021-06-12 20:35:07,624 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 106 [2021-06-12 20:35:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:08,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:08,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:08,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:08,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:08,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:08,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:08,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:08,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:08,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:08,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:08,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:08,252 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:08,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:08,260 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:08,788 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 113 [2021-06-12 20:35:08,788 INFO L628 ElimStorePlain]: treesize reduction 1247, result has 21.7 percent of original size [2021-06-12 20:35:08,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:08,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:08,952 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 20:35:08,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:35:08,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:09,115 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 20:35:09,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:09,116 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1890 vanished before elimination [2021-06-12 20:35:09,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:09,122 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:09,280 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-12 20:35:09,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:09,281 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:35:09,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1892 vanished before elimination [2021-06-12 20:35:09,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:09,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:09,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:35:09,288 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:09,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:09,293 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:09,418 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 20:35:09,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:09,419 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1894 vanished before elimination [2021-06-12 20:35:09,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:35:09,424 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:09,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:09,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:35:09,430 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:09,634 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-12 20:35:09,635 INFO L628 ElimStorePlain]: treesize reduction 33, result has 86.7 percent of original size [2021-06-12 20:35:09,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1896 vanished before elimination [2021-06-12 20:35:09,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1888 vanished before elimination [2021-06-12 20:35:09,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:35:09,646 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 18 variables, input treesize:1809, output treesize:228 [2021-06-12 20:35:09,824 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-06-12 20:35:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:10,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428842074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:10,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:10,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:35:10,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522972133] [2021-06-12 20:35:10,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:35:10,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:35:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:10,055 INFO L87 Difference]: Start difference. First operand 489 states and 1560 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:10,453 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 119 [2021-06-12 20:35:10,914 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 131 [2021-06-12 20:35:11,435 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 140 [2021-06-12 20:35:11,939 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 133 [2021-06-12 20:35:12,481 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 138 [2021-06-12 20:35:12,945 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 129 [2021-06-12 20:35:13,464 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 140 [2021-06-12 20:35:14,037 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 145 [2021-06-12 20:35:14,540 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 136 [2021-06-12 20:35:14,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:14,577 INFO L93 Difference]: Finished difference Result 764 states and 2260 transitions. [2021-06-12 20:35:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:35:14,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:35:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:14,579 INFO L225 Difference]: With dead ends: 764 [2021-06-12 20:35:14,579 INFO L226 Difference]: Without dead ends: 734 [2021-06-12 20:35:14,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5049.2ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:35:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-06-12 20:35:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 495. [2021-06-12 20:35:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.200404858299595) internal successors, (1581), 494 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1581 transitions. [2021-06-12 20:35:14,585 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1581 transitions. Word has length 20 [2021-06-12 20:35:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:14,585 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1581 transitions. [2021-06-12 20:35:14,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1581 transitions. [2021-06-12 20:35:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:35:14,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:14,585 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:14,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13640,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:14,786 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:14,786 INFO L82 PathProgramCache]: Analyzing trace with hash -555610972, now seen corresponding path program 97 times [2021-06-12 20:35:14,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:14,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017421070] [2021-06-12 20:35:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:14,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:14,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017421070] [2021-06-12 20:35:14,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017421070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:14,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300757589] [2021-06-12 20:35:14,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:35:15,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:15,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:15,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:35:15,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:15,710 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 103 [2021-06-12 20:35:15,711 INFO L628 ElimStorePlain]: treesize reduction 177, result has 68.1 percent of original size [2021-06-12 20:35:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:15,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:35:15,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:15,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:15,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:15,863 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 20:35:15,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:15,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:35:15,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:16,001 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 20:35:16,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:16,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:16,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:16,007 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:16,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:16,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:35:16,012 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:16,139 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:35:16,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:16,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:16,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:16,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:16,146 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:16,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:16,150 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:16,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:16,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:16,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:16,254 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:16,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:16,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:35:16,358 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:561, output treesize:226 [2021-06-12 20:35:16,531 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-06-12 20:35:17,010 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1912, v_prenex_1914, v_prenex_1916, v_prenex_1918, array_6, v_prenex_1910], 1=[v_prenex_1911, v_prenex_1913, array_0, v_prenex_1915, v_prenex_1917, v_prenex_1909]} [2021-06-12 20:35:17,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:17,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:17,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:17,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:17,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:17,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:17,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,439 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 97 [2021-06-12 20:35:17,439 INFO L628 ElimStorePlain]: treesize reduction 1265, result has 18.1 percent of original size [2021-06-12 20:35:17,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:17,445 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,553 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-12 20:35:17,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:35:17,559 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,662 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-12 20:35:17,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:17,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:35:17,668 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,776 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 20:35:17,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:17,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:35:17,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,889 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 20:35:17,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:17,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:35:17,894 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:17,899 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:18,066 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-12 20:35:18,066 INFO L628 ElimStorePlain]: treesize reduction 26, result has 88.1 percent of original size [2021-06-12 20:35:18,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1911 vanished before elimination [2021-06-12 20:35:18,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1913 vanished before elimination [2021-06-12 20:35:18,067 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:35:18,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1915 vanished before elimination [2021-06-12 20:35:18,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1917 vanished before elimination [2021-06-12 20:35:18,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1909 vanished before elimination [2021-06-12 20:35:18,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:35:18,069 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1785, output treesize:144 [2021-06-12 20:35:18,207 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-12 20:35:18,373 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-12 20:35:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:18,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300757589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:18,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:18,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:35:18,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139339186] [2021-06-12 20:35:18,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:35:18,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:18,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:35:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:35:18,448 INFO L87 Difference]: Start difference. First operand 495 states and 1581 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:18,885 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2021-06-12 20:35:19,374 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 110 [2021-06-12 20:35:19,635 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 117 [2021-06-12 20:35:20,026 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2021-06-12 20:35:20,322 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 117 [2021-06-12 20:35:20,965 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 129 [2021-06-12 20:35:21,352 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 121 [2021-06-12 20:35:21,919 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-06-12 20:35:22,629 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 146 [2021-06-12 20:35:23,020 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2021-06-12 20:35:23,690 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2021-06-12 20:35:24,425 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 149 [2021-06-12 20:35:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:24,605 INFO L93 Difference]: Finished difference Result 1033 states and 2997 transitions. [2021-06-12 20:35:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:35:24,605 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:35:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:24,606 INFO L225 Difference]: With dead ends: 1033 [2021-06-12 20:35:24,606 INFO L226 Difference]: Without dead ends: 974 [2021-06-12 20:35:24,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 6403.7ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:35:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-06-12 20:35:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 497. [2021-06-12 20:35:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.2016129032258065) internal successors, (1588), 496 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1588 transitions. [2021-06-12 20:35:24,614 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1588 transitions. Word has length 20 [2021-06-12 20:35:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:24,614 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1588 transitions. [2021-06-12 20:35:24,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1588 transitions. [2021-06-12 20:35:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:35:24,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:24,614 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:24,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13850 [2021-06-12 20:35:24,817 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2125789590, now seen corresponding path program 98 times [2021-06-12 20:35:24,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:24,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159868243] [2021-06-12 20:35:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:24,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159868243] [2021-06-12 20:35:24,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159868243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:24,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117871535] [2021-06-12 20:35:24,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:24,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:24,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:24,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:35:24,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:25,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:25,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:25,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:25,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:25,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:25,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:25,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:25,405 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:25,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:35:25,417 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:25,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:25,427 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:25,433 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:35:25,438 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:25,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:25,449 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:25,455 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:25,460 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:25,465 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:25,471 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:35:25,476 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:25,482 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:25,487 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:25,493 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:25,498 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:25,503 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:25,509 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:25,514 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:25,520 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:25,525 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:35:25,530 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:25,535 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:25,541 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:25,546 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:25,551 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:25,555 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:25,560 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,806 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-06-12 20:35:25,806 INFO L628 ElimStorePlain]: treesize reduction 636, result has 29.4 percent of original size [2021-06-12 20:35:25,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:35:25,812 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 2 variables, input treesize:2077, output treesize:269 [2021-06-12 20:35:26,008 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-06-12 20:35:26,710 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 100 [2021-06-12 20:35:26,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:26,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:26,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:26,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:26,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:35:26,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:26,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:26,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:26,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:26,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:26,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,965 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:35:26,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:27,370 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 104 [2021-06-12 20:35:27,370 INFO L628 ElimStorePlain]: treesize reduction 1286, result has 15.6 percent of original size [2021-06-12 20:35:27,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:27,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:27,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:27,470 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:27,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:27,559 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1935 vanished before elimination [2021-06-12 20:35:27,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:27,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:35:27,565 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:27,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:27,650 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1937 vanished before elimination [2021-06-12 20:35:27,650 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1939 vanished before elimination [2021-06-12 20:35:27,650 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:35:27,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:35:27,655 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:27,660 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:27,801 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-06-12 20:35:27,801 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.2 percent of original size [2021-06-12 20:35:27,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1940 vanished before elimination [2021-06-12 20:35:27,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:27,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:35:27,807 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:27,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:27,871 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1942 vanished before elimination [2021-06-12 20:35:27,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:35:27,874 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1639, output treesize:130 [2021-06-12 20:35:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:28,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117871535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:28,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:28,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:35:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111430398] [2021-06-12 20:35:28,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:35:28,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:28,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:35:28,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:28,070 INFO L87 Difference]: Start difference. First operand 497 states and 1588 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:28,488 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 121 [2021-06-12 20:35:29,181 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 132 [2021-06-12 20:35:30,008 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2021-06-12 20:35:31,197 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 216 DAG size of output: 208 [2021-06-12 20:35:32,464 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2021-06-12 20:35:33,362 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 161 [2021-06-12 20:35:34,182 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 152 [2021-06-12 20:35:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:34,205 INFO L93 Difference]: Finished difference Result 705 states and 2129 transitions. [2021-06-12 20:35:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:35:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:34,206 INFO L225 Difference]: With dead ends: 705 [2021-06-12 20:35:34,206 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 20:35:34,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 6726.8ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:35:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 20:35:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 495. [2021-06-12 20:35:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.200404858299595) internal successors, (1581), 494 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1581 transitions. [2021-06-12 20:35:34,211 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1581 transitions. Word has length 20 [2021-06-12 20:35:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:34,212 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1581 transitions. [2021-06-12 20:35:34,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1581 transitions. [2021-06-12 20:35:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:35:34,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:34,212 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:34,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13994 [2021-06-12 20:35:34,413 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1386449764, now seen corresponding path program 99 times [2021-06-12 20:35:34,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:34,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820652164] [2021-06-12 20:35:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:34,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:34,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820652164] [2021-06-12 20:35:34,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820652164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:34,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871067266] [2021-06-12 20:35:34,619 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:34,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:35:34,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:35:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:34,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:34,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:34,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:34,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:34,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:34,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:34,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,936 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 37 treesize of output 27 [2021-06-12 20:35:34,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:34,942 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:34,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,952 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 43 treesize of output 31 [2021-06-12 20:35:34,952 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:34,958 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:34,963 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:34,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:34,973 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:34,978 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:34,983 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:34,988 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:34,993 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:34,998 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:35,004 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:35:35,009 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:35,014 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:35,019 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:35,024 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:35,029 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:35,034 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:35,039 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:35,044 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:35,049 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:35,054 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:35,058 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:35,063 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:35,068 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:35,072 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:35,077 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:35,081 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,281 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-06-12 20:35:35,281 INFO L628 ElimStorePlain]: treesize reduction 435, result has 34.2 percent of original size [2021-06-12 20:35:35,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:35:35,293 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 2 variables, input treesize:2053, output treesize:220 [2021-06-12 20:35:35,462 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-06-12 20:35:35,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:35,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:35,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:35,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:35,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:35:35,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:35,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:35,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:35,905 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,338 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 99 [2021-06-12 20:35:36,339 INFO L628 ElimStorePlain]: treesize reduction 1246, result has 17.7 percent of original size [2021-06-12 20:35:36,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1955 vanished before elimination [2021-06-12 20:35:36,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:36,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:36,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:35:36,346 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:36,351 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:36,448 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1957 vanished before elimination [2021-06-12 20:35:36,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:36,454 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:36,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:36,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:36,653 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:35:36,653 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1950 vanished before elimination [2021-06-12 20:35:36,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:35:36,658 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:36,749 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1951 vanished before elimination [2021-06-12 20:35:36,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:36,754 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:36,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1953 vanished before elimination [2021-06-12 20:35:36,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:35:36,845 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1661, output treesize:170 [2021-06-12 20:35:36,989 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-06-12 20:35:37,219 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-12 20:35:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:37,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871067266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:37,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:37,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:35:37,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614059213] [2021-06-12 20:35:37,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:35:37,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:35:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:37,294 INFO L87 Difference]: Start difference. First operand 495 states and 1581 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:37,689 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 115 [2021-06-12 20:35:38,099 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 114 [2021-06-12 20:35:38,494 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2021-06-12 20:35:39,056 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 134 [2021-06-12 20:35:39,643 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 141 [2021-06-12 20:35:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:39,686 INFO L93 Difference]: Finished difference Result 779 states and 2351 transitions. [2021-06-12 20:35:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:35:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:35:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:39,687 INFO L225 Difference]: With dead ends: 779 [2021-06-12 20:35:39,687 INFO L226 Difference]: Without dead ends: 764 [2021-06-12 20:35:39,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2883.4ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:35:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-06-12 20:35:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 496. [2021-06-12 20:35:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.2040404040404042) internal successors, (1586), 495 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1586 transitions. [2021-06-12 20:35:39,693 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1586 transitions. Word has length 20 [2021-06-12 20:35:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:39,693 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1586 transitions. [2021-06-12 20:35:39,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1586 transitions. [2021-06-12 20:35:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:35:39,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:39,693 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:39,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14203 [2021-06-12 20:35:39,894 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash 167814404, now seen corresponding path program 100 times [2021-06-12 20:35:39,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:39,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770641744] [2021-06-12 20:35:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:40,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:40,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770641744] [2021-06-12 20:35:40,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770641744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:40,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357762774] [2021-06-12 20:35:40,044 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:40,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:40,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:35:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:40,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:40,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:40,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-06-12 20:35:40,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:40,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:40,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:40,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:40,448 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:40,453 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:40,458 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:35:40,463 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:40,468 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:40,473 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:35:40,477 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:40,483 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:40,488 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:40,494 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:40,499 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:40,504 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:35:40,510 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:40,515 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:40,520 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:40,526 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:40,531 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:40,536 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:40,541 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:40,546 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:40,552 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:40,556 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:40,561 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:40,566 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:40,571 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:40,575 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:40,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:35:40,580 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:40,584 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:40,588 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:40,592 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,751 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-06-12 20:35:40,751 INFO L628 ElimStorePlain]: treesize reduction 492, result has 23.7 percent of original size [2021-06-12 20:35:40,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2021-06-12 20:35:40,755 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 2 variables, input treesize:1609, output treesize:135 [2021-06-12 20:35:41,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:35:41,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:41,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:41,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:41,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:41,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:41,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-12 20:35:41,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:41,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:41,434 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:41,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:41,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:41,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:41,741 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 65 [2021-06-12 20:35:41,742 INFO L628 ElimStorePlain]: treesize reduction 922, result has 19.6 percent of original size [2021-06-12 20:35:41,742 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1966 vanished before elimination [2021-06-12 20:35:41,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:41,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:41,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:41,839 INFO L518 ElimStorePlain]: Eliminatee array_6 vanished before elimination [2021-06-12 20:35:41,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:41,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:41,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:41,933 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1962 vanished before elimination [2021-06-12 20:35:41,936 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 7 treesize of output 5 [2021-06-12 20:35:41,937 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:42,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:42,024 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1964 vanished before elimination [2021-06-12 20:35:42,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 20:35:42,027 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1324, output treesize:180 [2021-06-12 20:35:42,171 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-06-12 20:35:42,364 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-12 20:35:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:42,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357762774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:42,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:42,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 20:35:42,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896197906] [2021-06-12 20:35:42,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:35:42,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:35:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:42,519 INFO L87 Difference]: Start difference. First operand 496 states and 1586 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:42,820 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-12 20:35:43,080 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-12 20:35:43,436 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2021-06-12 20:35:43,935 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 92 [2021-06-12 20:35:44,508 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-06-12 20:35:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:44,548 INFO L93 Difference]: Finished difference Result 797 states and 2421 transitions. [2021-06-12 20:35:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:35:44,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:35:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:44,550 INFO L225 Difference]: With dead ends: 797 [2021-06-12 20:35:44,550 INFO L226 Difference]: Without dead ends: 782 [2021-06-12 20:35:44,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2444.8ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:35:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-12 20:35:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 507. [2021-06-12 20:35:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.2351778656126484) internal successors, (1637), 506 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1637 transitions. [2021-06-12 20:35:44,556 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1637 transitions. Word has length 20 [2021-06-12 20:35:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:44,556 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1637 transitions. [2021-06-12 20:35:44,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1637 transitions. [2021-06-12 20:35:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:35:44,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:44,556 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:44,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14382 [2021-06-12 20:35:44,757 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1919456984, now seen corresponding path program 101 times [2021-06-12 20:35:44,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:44,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799955127] [2021-06-12 20:35:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:44,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799955127] [2021-06-12 20:35:44,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799955127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878405150] [2021-06-12 20:35:44,907 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:44,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:44,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:35:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:45,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:45,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:45,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:45,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:45,073 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:45,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:45,083 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:45,088 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:45,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 20:35:45,097 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:45,102 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:45,106 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:45,111 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:45,116 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:45,120 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:45,125 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:45,129 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:45,134 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:45,139 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:45,143 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:45,148 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:45,152 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:45,156 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:45,161 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:45,165 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:45,170 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:45,174 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-12 20:35:45,179 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:45,183 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:45,187 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 20:35:45,192 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:45,196 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:45,200 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:45,204 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 20:35:45,208 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:45,212 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:35:45,216 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,380 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-06-12 20:35:45,381 INFO L628 ElimStorePlain]: treesize reduction 380, result has 32.9 percent of original size [2021-06-12 20:35:45,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:35:45,383 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1873, output treesize:186 [2021-06-12 20:35:45,814 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-12 20:35:46,121 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-12 20:35:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:46,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878405150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:46,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:46,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:35:46,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113872700] [2021-06-12 20:35:46,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:35:46,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:46,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:35:46,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:46,300 INFO L87 Difference]: Start difference. First operand 507 states and 1637 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:46,679 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-12 20:35:46,970 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-12 20:35:47,367 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 20:35:47,757 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-12 20:35:48,250 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2021-06-12 20:35:48,702 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2021-06-12 20:35:49,210 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2021-06-12 20:35:49,746 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-12 20:35:50,225 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-12 20:35:50,791 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2021-06-12 20:35:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:50,831 INFO L93 Difference]: Finished difference Result 908 states and 2687 transitions. [2021-06-12 20:35:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:35:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:35:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:50,833 INFO L225 Difference]: With dead ends: 908 [2021-06-12 20:35:50,833 INFO L226 Difference]: Without dead ends: 878 [2021-06-12 20:35:50,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 5053.6ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:35:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-12 20:35:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 508. [2021-06-12 20:35:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.2406311637080867) internal successors, (1643), 507 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1643 transitions. [2021-06-12 20:35:50,839 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1643 transitions. Word has length 20 [2021-06-12 20:35:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:50,839 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1643 transitions. [2021-06-12 20:35:50,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1643 transitions. [2021-06-12 20:35:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:35:50,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:50,840 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:51,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14675 [2021-06-12 20:35:51,049 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1205321316, now seen corresponding path program 102 times [2021-06-12 20:35:51,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:51,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136931943] [2021-06-12 20:35:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:51,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:51,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136931943] [2021-06-12 20:35:51,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136931943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:51,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525973579] [2021-06-12 20:35:51,230 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:51,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:35:51,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:51,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:35:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:51,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:51,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:51,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 20:35:51,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:51,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:51,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:51,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-12 20:35:51,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:51,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:35:51,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:51,964 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2021-06-12 20:35:51,964 INFO L628 ElimStorePlain]: treesize reduction 116, result has 73.9 percent of original size [2021-06-12 20:35:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:51,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:51,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:51,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:51,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12 [2021-06-12 20:35:51,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,102 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-12 20:35:52,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:52,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:52,109 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:52,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:35:52,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,236 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 20:35:52,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:52,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:52,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:52,242 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,362 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 20:35:52,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:52,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:52,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:35:52,368 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,483 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-12 20:35:52,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:52,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:52,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:35:52,489 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,607 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 20:35:52,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:52,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:35:52,613 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:597, output treesize:260 [2021-06-12 20:35:52,805 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-06-12 20:35:53,210 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1988, v_prenex_1980, array_6, v_prenex_1982, v_prenex_1984, v_prenex_1986], 1=[v_prenex_1979, array_0, v_prenex_1981, v_prenex_1983, v_prenex_1985, v_prenex_1987]} [2021-06-12 20:35:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:53,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:53,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:35:53,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-12 20:35:53,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:53,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:35:53,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,740 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 103 [2021-06-12 20:35:53,741 INFO L628 ElimStorePlain]: treesize reduction 1412, result has 17.7 percent of original size [2021-06-12 20:35:53,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:35:53,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,880 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 20:35:53,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:53,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:35:53,887 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12 [2021-06-12 20:35:53,892 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:54,110 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2021-06-12 20:35:54,110 INFO L628 ElimStorePlain]: treesize reduction 30, result has 88.7 percent of original size [2021-06-12 20:35:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-12 20:35:54,116 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:54,219 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 20:35:54,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:54,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:54,240 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:54,341 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 20:35:54,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:54,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:35:54,361 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:54,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:54,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1979 vanished before elimination [2021-06-12 20:35:54,460 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:35:54,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1981 vanished before elimination [2021-06-12 20:35:54,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1983 vanished before elimination [2021-06-12 20:35:54,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1985 vanished before elimination [2021-06-12 20:35:54,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1987 vanished before elimination [2021-06-12 20:35:54,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:35:54,463 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:1865, output treesize:194 [2021-06-12 20:35:54,632 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:35:54,865 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-06-12 20:35:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:55,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525973579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:55,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:55,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:35:55,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541551126] [2021-06-12 20:35:55,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:35:55,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:35:55,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:35:55,081 INFO L87 Difference]: Start difference. First operand 508 states and 1643 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:55,538 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 109 [2021-06-12 20:35:55,896 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 114 [2021-06-12 20:35:56,289 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 120 [2021-06-12 20:35:56,705 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 108 [2021-06-12 20:35:57,292 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 135 [2021-06-12 20:35:57,950 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 123 [2021-06-12 20:35:58,564 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 138 [2021-06-12 20:35:59,550 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 138 [2021-06-12 20:36:00,472 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 132 [2021-06-12 20:36:01,512 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 141 [2021-06-12 20:36:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:01,575 INFO L93 Difference]: Finished difference Result 1123 states and 3224 transitions. [2021-06-12 20:36:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:36:01,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:01,576 INFO L225 Difference]: With dead ends: 1123 [2021-06-12 20:36:01,576 INFO L226 Difference]: Without dead ends: 1049 [2021-06-12 20:36:01,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 6982.9ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:36:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-12 20:36:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 504. [2021-06-12 20:36:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.234592445328032) internal successors, (1627), 503 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1627 transitions. [2021-06-12 20:36:01,583 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1627 transitions. Word has length 20 [2021-06-12 20:36:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:01,583 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1627 transitions. [2021-06-12 20:36:01,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1627 transitions. [2021-06-12 20:36:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:01,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:01,584 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:01,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14727 [2021-06-12 20:36:01,784 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2073894502, now seen corresponding path program 103 times [2021-06-12 20:36:01,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:01,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367937072] [2021-06-12 20:36:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:01,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367937072] [2021-06-12 20:36:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367937072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646152222] [2021-06-12 20:36:01,992 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:36:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:02,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:36:02,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:02,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-12 20:36:02,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:02,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:36:02,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:02,723 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2021-06-12 20:36:02,724 INFO L628 ElimStorePlain]: treesize reduction 136, result has 71.5 percent of original size [2021-06-12 20:36:02,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:36:02,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:02,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:36:02,735 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:02,843 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 20:36:02,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:02,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:36:02,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:02,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:36:02,854 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:02,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:02,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:02,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:36:02,959 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:03,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:03,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:03,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-12 20:36:03,062 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:03,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:03,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:03,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:36:03,162 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:03,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:03,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-06-12 20:36:03,263 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:561, output treesize:218 [2021-06-12 20:36:03,437 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-12 20:36:03,886 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2021-06-12 20:36:04,139 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2005, array_6, v_prenex_2002, v_prenex_2007], 1=[array_0, v_prenex_2001, v_prenex_2003, v_prenex_2006]} [2021-06-12 20:36:04,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:36:04,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:36:04,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 20:36:04,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:36:04,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:36:04,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:36:04,180 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,466 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2021-06-12 20:36:04,467 INFO L628 ElimStorePlain]: treesize reduction 814, result has 22.9 percent of original size [2021-06-12 20:36:04,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:36:04,472 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:04,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:36:04,573 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:36:04,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,733 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-12 20:36:04,733 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.8 percent of original size [2021-06-12 20:36:04,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:36:04,737 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:04,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:04,809 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:36:04,809 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2001 vanished before elimination [2021-06-12 20:36:04,809 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2003 vanished before elimination [2021-06-12 20:36:04,809 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2006 vanished before elimination [2021-06-12 20:36:04,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:36:04,811 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:1193, output treesize:143 [2021-06-12 20:36:04,952 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 20:36:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:05,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646152222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:05,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:05,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 20:36:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139757612] [2021-06-12 20:36:05,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:36:05,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:05,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:36:05,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:36:05,119 INFO L87 Difference]: Start difference. First operand 504 states and 1627 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:05,569 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2021-06-12 20:36:05,911 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2021-06-12 20:36:06,477 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 145 [2021-06-12 20:36:06,957 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 Received shutdown request... [2021-06-12 20:36:07,342 WARN L222 SmtUtils]: Removed 10 from assertion stack [2021-06-12 20:36:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:36:07,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14869,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:07,542 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:36:07,544 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:36:07,545 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:36:07,545 INFO L202 PluginConnector]: Adding new model word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:36:07 BasicIcfg [2021-06-12 20:36:07,545 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:36:07,546 INFO L168 Benchmark]: Toolchain (without parser) took 771219.88 ms. Allocated memory was 212.9 MB in the beginning and 411.0 MB in the end (delta: 198.2 MB). Free memory was 192.9 MB in the beginning and 337.7 MB in the end (delta: -144.8 MB). Peak memory consumption was 270.9 MB. Max. memory is 8.0 GB. [2021-06-12 20:36:07,546 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 212.9 MB. Free memory is still 194.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:36:07,546 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.67 ms. Allocated memory is still 212.9 MB. Free memory was 192.9 MB in the beginning and 191.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:36:07,546 INFO L168 Benchmark]: Boogie Preprocessor took 12.95 ms. Allocated memory is still 212.9 MB. Free memory was 191.4 MB in the beginning and 190.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:36:07,546 INFO L168 Benchmark]: RCFGBuilder took 361.66 ms. Allocated memory is still 212.9 MB. Free memory was 190.2 MB in the beginning and 190.5 MB in the end (delta: -264.8 kB). Peak memory consumption was 23.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:36:07,546 INFO L168 Benchmark]: TraceAbstraction took 770819.09 ms. Allocated memory was 212.9 MB in the beginning and 411.0 MB in the end (delta: 198.2 MB). Free memory was 190.4 MB in the beginning and 337.7 MB in the end (delta: -147.4 MB). Peak memory consumption was 268.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:36:07,546 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 0.09 ms. Allocated memory is still 212.9 MB. Free memory is still 194.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.67 ms. Allocated memory is still 212.9 MB. Free memory was 192.9 MB in the beginning and 191.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.95 ms. Allocated memory is still 212.9 MB. Free memory was 191.4 MB in the beginning and 190.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 361.66 ms. Allocated memory is still 212.9 MB. Free memory was 190.2 MB in the beginning and 190.5 MB in the end (delta: -264.8 kB). Peak memory consumption was 23.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 770819.09 ms. Allocated memory was 212.9 MB in the beginning and 411.0 MB in the end (delta: 198.2 MB). Free memory was 190.4 MB in the beginning and 337.7 MB in the end (delta: -147.4 MB). Peak memory consumption was 268.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (504states) and FLOYD_HOARE automaton (currently 13 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 134 for 271ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 770745.6ms, OverallIterations: 252, TraceHistogramMax: 1, EmptinessCheckTime: 118.0ms, AutomataDifference: 411527.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14014 SDtfs, 26695 SDslu, 85875 SDs, 0 SdLazy, 73940 SolverSat, 3750 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46794.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6447 GetRequests, 1918 SyntacticMatches, 179 SemanticMatches, 4349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10157 ImplicationChecksByTransitivity, 455454.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=508occurred in iteration=250, InterpolantAutomatonStates: 2630, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1110.9ms AutomataMinimizationTime, 251 MinimizatonAttempts, 54067 StatesRemovedByMinimization, 250 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 621.1ms SsaConstructionTime, 1654.1ms SatisfiabilityAnalysisTime, 326212.7ms InterpolantComputationTime, 7104 NumberOfCodeBlocks, 7104 NumberOfCodeBlocksAsserted, 492 NumberOfCheckSat, 6722 ConstructedInterpolants, 596 QuantifiedInterpolants, 231279 SizeOfPredicates, 1467 NumberOfNonLiveVariables, 10098 ConjunctsInSsa, 2634 ConjunctsInUnsatCore, 382 InterpolantComputations, 122 PerfectInterpolantSequences, 0/672 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