/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:00:33,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:00:33,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:00:33,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:00:33,234 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 [2021-03-11 00:00:33,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:00:33,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:00:33,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:00:33,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:00:33,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:00:33,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:00:33,272 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:00:33,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:00:33,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:00:33,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:00:33,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:00:33,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:00:33,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:00:33,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:00:33,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:00:33,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:00:33,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:00:33,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:00:33,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:00:33,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:00:33,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:00:33,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:00:33,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:00:33,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:00:33,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:00:33,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:00:33,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:00:33,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:00:33,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:00:33,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:00:33,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:00:33,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:00:33,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:00:33,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:00:33,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:00:33,615 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:00:33,616 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:00:33,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl [2021-03-11 00:00:33,617 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl' [2021-03-11 00:00:33,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:00:33,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:00:33,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:00:33,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:00:33,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:00:33,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:33,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:33,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:00:33,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:00:33,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:00:33,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:00:34,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:34,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:34,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:34,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:34,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:34,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:34,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/1) ... [2021-03-11 00:00:34,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:00:34,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:00:34,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:00:34,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:00:34,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (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 [2021-03-11 00:00:34,096 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:00:34,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:00:34,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:00:34,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:00:34,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:00:34,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:00:34,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:00:34,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:00:34,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:00:34,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:00:34,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:00:34,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:00:34,098 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:00:34,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:00:34,252 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:00:34,254 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:00:34 BoogieIcfgContainer [2021-03-11 00:00:34,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:00:34,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:00:34,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:00:34,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:00:34,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:00:33" (1/2) ... [2021-03-11 00:00:34,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53dc3885 and model type max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:00:34, skipping insertion in model container [2021-03-11 00:00:34,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:00:34" (2/2) ... [2021-03-11 00:00:34,259 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun.wvr.bpl [2021-03-11 00:00:34,284 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:00:34,284 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:00:34,287 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:00:34,288 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:00:34,349 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:00:34,373 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:00:34,418 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:00:34,418 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:00:34,418 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:00:34,418 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:00:34,418 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:00:34,419 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:00:34,419 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:00:34,419 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:00:34,430 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-03-11 00:00:34,454 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-11 00:00:34,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:34,468 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:34,468 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:34,473 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-03-11 00:00:34,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:34,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311474809] [2021-03-11 00:00:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:34,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311474809] [2021-03-11 00:00:34,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:00:34,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 00:00:34,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761803593] [2021-03-11 00:00:34,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:00:34,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:34,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:00:34,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:00:34,704 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:34,737 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-03-11 00:00:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:00:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-11 00:00:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:34,748 INFO L225 Difference]: With dead ends: 217 [2021-03-11 00:00:34,748 INFO L226 Difference]: Without dead ends: 202 [2021-03-11 00:00:34,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:00:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-11 00:00:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-03-11 00:00:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-03-11 00:00:34,790 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-03-11 00:00:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:34,791 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-03-11 00:00:34,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-03-11 00:00:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:00:34,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:34,794 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:34,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:00:34,794 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-03-11 00:00:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:34,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997739227] [2021-03-11 00:00:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:34,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997739227] [2021-03-11 00:00:34,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:00:34,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:00:34,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339379278] [2021-03-11 00:00:34,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:00:34,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:00:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:00:34,848 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:34,887 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-03-11 00:00:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:00:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-11 00:00:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:34,889 INFO L225 Difference]: With dead ends: 158 [2021-03-11 00:00:34,889 INFO L226 Difference]: Without dead ends: 158 [2021-03-11 00:00:34,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:00:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-11 00:00:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-03-11 00:00:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-03-11 00:00:34,903 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-03-11 00:00:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:34,903 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-03-11 00:00:34,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-03-11 00:00:34,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:00:34,904 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:34,905 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:34,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:00:34,905 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:34,906 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-03-11 00:00:34,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:34,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681330250] [2021-03-11 00:00:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:34,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681330250] [2021-03-11 00:00:34,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:00:34,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:00:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138338711] [2021-03-11 00:00:34,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:00:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:34,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:00:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:00:34,964 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:35,036 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-03-11 00:00:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:00:35,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-11 00:00:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:35,049 INFO L225 Difference]: With dead ends: 183 [2021-03-11 00:00:35,049 INFO L226 Difference]: Without dead ends: 183 [2021-03-11 00:00:35,050 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:00:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-11 00:00:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-03-11 00:00:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-03-11 00:00:35,070 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-03-11 00:00:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:35,070 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-03-11 00:00:35,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-03-11 00:00:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:00:35,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:35,072 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:35,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 00:00:35,073 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-03-11 00:00:35,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:35,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993893247] [2021-03-11 00:00:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:35,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993893247] [2021-03-11 00:00:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893334570] [2021-03-11 00:00:35,428 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 [2021-03-11 00:00:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:35,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:00:35,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:35,832 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 21 treesize of output 13 [2021-03-11 00:00:35,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:35,837 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 16 treesize of output 10 [2021-03-11 00:00:35,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:35,843 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 16 treesize of output 10 [2021-03-11 00:00:35,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:35,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:35,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:35,863 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-03-11 00:00:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:35,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:35,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:35,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001414572] [2021-03-11 00:00:35,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:35,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:35,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:35,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:35,907 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:36,173 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-03-11 00:00:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:00:36,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:00:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:36,176 INFO L225 Difference]: With dead ends: 330 [2021-03-11 00:00:36,176 INFO L226 Difference]: Without dead ends: 315 [2021-03-11 00:00:36,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:00:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-11 00:00:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-03-11 00:00:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-03-11 00:00:36,194 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-03-11 00:00:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:36,194 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-03-11 00:00:36,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-03-11 00:00:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:00:36,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:36,196 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:36,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:36,418 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-03-11 00:00:36,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825800499] [2021-03-11 00:00:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:36,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825800499] [2021-03-11 00:00:36,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568924641] [2021-03-11 00:00:36,715 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 [2021-03-11 00:00:36,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:36,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:00:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:37,043 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:37,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:00:37,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:37,066 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:37,066 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:00:37,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:37,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:37,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:00:37,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:37,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:37,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-11 00:00:37,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:37,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:37,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:00:37,168 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-03-11 00:00:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:37,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:37,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-11 00:00:37,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458767968] [2021-03-11 00:00:37,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:00:37,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:00:37,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:00:37,309 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:37,874 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-03-11 00:00:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:00:37,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:00:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:37,879 INFO L225 Difference]: With dead ends: 374 [2021-03-11 00:00:37,879 INFO L226 Difference]: Without dead ends: 359 [2021-03-11 00:00:37,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:00:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-11 00:00:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-03-11 00:00:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-03-11 00:00:37,902 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-03-11 00:00:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:37,902 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-03-11 00:00:37,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-03-11 00:00:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:00:37,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:37,910 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:38,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:38,132 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-03-11 00:00:38,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:38,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738105106] [2021-03-11 00:00:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:38,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738105106] [2021-03-11 00:00:38,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065792209] [2021-03-11 00:00:38,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:38,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:00:38,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:00:38,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:38,556 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 16 treesize of output 10 [2021-03-11 00:00:38,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:38,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:00:38,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:38,565 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 21 treesize of output 13 [2021-03-11 00:00:38,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:38,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-11 00:00:38,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:38,572 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 10 [2021-03-11 00:00:38,573 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:38,582 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 21 treesize of output 13 [2021-03-11 00:00:38,584 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:38,609 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-11 00:00:38,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:38,611 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-03-11 00:00:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:38,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:38,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:00:38,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502765607] [2021-03-11 00:00:38,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:38,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:38,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:38,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:38,659 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-03-11 00:00:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:38,849 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-03-11 00:00:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:00:38,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 22 [2021-03-11 00:00:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:38,851 INFO L225 Difference]: With dead ends: 296 [2021-03-11 00:00:38,851 INFO L226 Difference]: Without dead ends: 281 [2021-03-11 00:00:38,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:00:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-11 00:00:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-03-11 00:00:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-03-11 00:00:38,859 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-03-11 00:00:38,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:38,860 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-03-11 00:00:38,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-03-11 00:00:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-03-11 00:00:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:00:38,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:38,861 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:39,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-11 00:00:39,083 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:39,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-03-11 00:00:39,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:39,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189652724] [2021-03-11 00:00:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:39,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189652724] [2021-03-11 00:00:39,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152084785] [2021-03-11 00:00:39,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:39,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:39,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:39,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:00:39,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:39,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-11 00:00:39,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:39,546 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:39,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:00:39,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:39,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:39,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:39,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:00:39,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:39,629 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:00:39,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:00:39,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:39,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:39,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:00:39,717 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-03-11 00:00:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:39,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:39,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:39,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11451917] [2021-03-11 00:00:39,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:39,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:39,863 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:40,225 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-03-11 00:00:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:00:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:00:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:40,227 INFO L225 Difference]: With dead ends: 425 [2021-03-11 00:00:40,228 INFO L226 Difference]: Without dead ends: 410 [2021-03-11 00:00:40,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 526.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:00:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-11 00:00:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-03-11 00:00:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-03-11 00:00:40,236 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-03-11 00:00:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:40,236 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-03-11 00:00:40,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-03-11 00:00:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:40,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:40,237 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:40,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:40,451 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-03-11 00:00:40,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:40,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218838042] [2021-03-11 00:00:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:40,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218838042] [2021-03-11 00:00:40,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079666901] [2021-03-11 00:00:40,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:00:40,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:00:40,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:40,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:40,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:40,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:40,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347511692] [2021-03-11 00:00:40,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:40,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:40,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:40,655 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:41,074 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-03-11 00:00:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:00:41,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:41,079 INFO L225 Difference]: With dead ends: 619 [2021-03-11 00:00:41,079 INFO L226 Difference]: Without dead ends: 619 [2021-03-11 00:00:41,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:00:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-03-11 00:00:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-03-11 00:00:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-03-11 00:00:41,090 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-03-11 00:00:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:41,091 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-03-11 00:00:41,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-03-11 00:00:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:41,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:41,093 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:41,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-11 00:00:41,307 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:41,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-03-11 00:00:41,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:41,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705174778] [2021-03-11 00:00:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:41,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705174778] [2021-03-11 00:00:41,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881767551] [2021-03-11 00:00:41,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:41,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:41,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:41,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:41,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:41,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589146276] [2021-03-11 00:00:41,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:41,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:41,483 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:42,282 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-03-11 00:00:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:00:42,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:42,289 INFO L225 Difference]: With dead ends: 1078 [2021-03-11 00:00:42,289 INFO L226 Difference]: Without dead ends: 1078 [2021-03-11 00:00:42,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:00:42,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-11 00:00:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-03-11 00:00:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-03-11 00:00:42,303 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-03-11 00:00:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:42,303 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-03-11 00:00:42,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-03-11 00:00:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:42,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:42,305 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:42,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:42,520 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-03-11 00:00:42,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:42,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340895610] [2021-03-11 00:00:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:42,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340895610] [2021-03-11 00:00:42,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946970997] [2021-03-11 00:00:42,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:00:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:42,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:42,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:42,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295678290] [2021-03-11 00:00:42,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:42,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:42,708 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:43,402 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-03-11 00:00:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:00:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:43,410 INFO L225 Difference]: With dead ends: 951 [2021-03-11 00:00:43,410 INFO L226 Difference]: Without dead ends: 951 [2021-03-11 00:00:43,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:00:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-11 00:00:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-03-11 00:00:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-03-11 00:00:43,430 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-03-11 00:00:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:43,430 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-03-11 00:00:43,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-03-11 00:00:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:43,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:43,431 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:43,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:43,647 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:43,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-03-11 00:00:43,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:43,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773132691] [2021-03-11 00:00:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:43,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773132691] [2021-03-11 00:00:43,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521727821] [2021-03-11 00:00:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:00:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:43,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:43,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:00:43,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148218531] [2021-03-11 00:00:43,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:00:43,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:43,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:00:43,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:00:43,804 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:43,907 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-03-11 00:00:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:00:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:43,910 INFO L225 Difference]: With dead ends: 669 [2021-03-11 00:00:43,910 INFO L226 Difference]: Without dead ends: 663 [2021-03-11 00:00:43,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-11 00:00:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-03-11 00:00:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-03-11 00:00:43,922 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-03-11 00:00:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:43,923 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-03-11 00:00:43,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-03-11 00:00:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:43,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:43,924 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:44,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-11 00:00:44,146 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:44,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:44,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-03-11 00:00:44,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:44,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859647030] [2021-03-11 00:00:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:44,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859647030] [2021-03-11 00:00:44,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901659264] [2021-03-11 00:00:44,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:44,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:44,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:44,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:44,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:00:44,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926749126] [2021-03-11 00:00:44,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:44,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:44,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:44,300 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:44,494 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-03-11 00:00:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:00:44,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:44,504 INFO L225 Difference]: With dead ends: 710 [2021-03-11 00:00:44,504 INFO L226 Difference]: Without dead ends: 672 [2021-03-11 00:00:44,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:00:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-11 00:00:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-11 00:00:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-03-11 00:00:44,518 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-03-11 00:00:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:44,518 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-03-11 00:00:44,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-03-11 00:00:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:44,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:44,520 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:44,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:44,741 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-03-11 00:00:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:44,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914705268] [2021-03-11 00:00:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:44,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914705268] [2021-03-11 00:00:44,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143221477] [2021-03-11 00:00:44,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:44,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:00:44,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:44,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:44,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:00:44,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163581103] [2021-03-11 00:00:44,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:00:44,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:00:44,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:00:44,859 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:44,957 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-03-11 00:00:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:00:44,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:44,970 INFO L225 Difference]: With dead ends: 830 [2021-03-11 00:00:44,970 INFO L226 Difference]: Without dead ends: 830 [2021-03-11 00:00:44,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-11 00:00:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-03-11 00:00:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-03-11 00:00:44,985 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-03-11 00:00:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:44,985 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-03-11 00:00:44,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-03-11 00:00:44,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:44,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:44,987 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:45,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-11 00:00:45,203 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:45,204 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-03-11 00:00:45,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:45,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992770882] [2021-03-11 00:00:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992770882] [2021-03-11 00:00:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754623697] [2021-03-11 00:00:45,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:45,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:00:45,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:45,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:45,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:45,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211958053] [2021-03-11 00:00:45,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:45,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:45,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:45,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:45,361 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:45,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:45,642 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-03-11 00:00:45,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:00:45,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:45,647 INFO L225 Difference]: With dead ends: 1196 [2021-03-11 00:00:45,647 INFO L226 Difference]: Without dead ends: 1196 [2021-03-11 00:00:45,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:00:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-03-11 00:00:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-03-11 00:00:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-03-11 00:00:45,665 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-03-11 00:00:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:45,665 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-03-11 00:00:45,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-03-11 00:00:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:45,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:45,667 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:45,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-11 00:00:45,883 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-03-11 00:00:45,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:45,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257040315] [2021-03-11 00:00:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:45,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257040315] [2021-03-11 00:00:45,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258293473] [2021-03-11 00:00:45,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:00:45,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:45,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:46,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:46,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:46,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979809494] [2021-03-11 00:00:46,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:46,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:46,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:46,017 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:46,440 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-03-11 00:00:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:00:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:46,446 INFO L225 Difference]: With dead ends: 1492 [2021-03-11 00:00:46,446 INFO L226 Difference]: Without dead ends: 1492 [2021-03-11 00:00:46,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:00:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-11 00:00:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-03-11 00:00:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-03-11 00:00:46,467 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-03-11 00:00:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:46,468 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-03-11 00:00:46,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-03-11 00:00:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:46,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:46,469 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:46,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:00:46,683 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:46,684 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-03-11 00:00:46,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:46,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833891319] [2021-03-11 00:00:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:46,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833891319] [2021-03-11 00:00:46,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193259449] [2021-03-11 00:00:46,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:46,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:46,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:46,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:46,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:46,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:46,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:00:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486325998] [2021-03-11 00:00:46,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:46,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:46,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:46,834 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:47,065 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-11 00:00:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:00:47,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:47,069 INFO L225 Difference]: With dead ends: 1258 [2021-03-11 00:00:47,070 INFO L226 Difference]: Without dead ends: 1248 [2021-03-11 00:00:47,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:00:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-11 00:00:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-03-11 00:00:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-03-11 00:00:47,089 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-03-11 00:00:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:47,089 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-03-11 00:00:47,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:47,089 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-03-11 00:00:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:47,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:47,091 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:47,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-11 00:00:47,313 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-03-11 00:00:47,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:47,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007866372] [2021-03-11 00:00:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:47,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007866372] [2021-03-11 00:00:47,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053879815] [2021-03-11 00:00:47,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:47,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:47,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:47,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:47,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:47,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:00:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370726245] [2021-03-11 00:00:47,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:47,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:47,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:47,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:47,476 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:47,763 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-03-11 00:00:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:00:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:47,767 INFO L225 Difference]: With dead ends: 1329 [2021-03-11 00:00:47,767 INFO L226 Difference]: Without dead ends: 1329 [2021-03-11 00:00:47,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:00:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-11 00:00:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-03-11 00:00:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-03-11 00:00:47,788 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-03-11 00:00:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:47,789 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-03-11 00:00:47,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-03-11 00:00:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:47,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:47,791 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:48,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:48,012 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-03-11 00:00:48,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:48,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585997187] [2021-03-11 00:00:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:48,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585997187] [2021-03-11 00:00:48,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082473474] [2021-03-11 00:00:48,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:48,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:48,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:48,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:00:48,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800938134] [2021-03-11 00:00:48,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:00:48,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:00:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:00:48,150 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:48,498 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-03-11 00:00:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:00:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:48,504 INFO L225 Difference]: With dead ends: 1548 [2021-03-11 00:00:48,504 INFO L226 Difference]: Without dead ends: 1544 [2021-03-11 00:00:48,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:00:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-11 00:00:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-03-11 00:00:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-03-11 00:00:48,527 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-03-11 00:00:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:48,527 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-03-11 00:00:48,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-03-11 00:00:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:48,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:48,531 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:48,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:48,739 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-03-11 00:00:48,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:48,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370481890] [2021-03-11 00:00:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370481890] [2021-03-11 00:00:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542563897] [2021-03-11 00:00:48,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:48,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:48,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:48,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:48,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907333707] [2021-03-11 00:00:48,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:48,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:48,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:48,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:48,893 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:49,638 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-03-11 00:00:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:00:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:49,660 INFO L225 Difference]: With dead ends: 2734 [2021-03-11 00:00:49,660 INFO L226 Difference]: Without dead ends: 2734 [2021-03-11 00:00:49,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:00:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-03-11 00:00:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-03-11 00:00:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-03-11 00:00:49,693 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-03-11 00:00:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:49,693 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-03-11 00:00:49,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-03-11 00:00:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:49,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:49,696 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:49,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:49,899 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:49,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-03-11 00:00:49,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:49,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265260230] [2021-03-11 00:00:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:49,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265260230] [2021-03-11 00:00:49,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647432427] [2021-03-11 00:00:49,936 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 [2021-03-11 00:00:49,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:00:49,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:50,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:50,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:50,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122370480] [2021-03-11 00:00:50,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:50,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:50,054 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:50,743 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-03-11 00:00:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:00:50,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:50,750 INFO L225 Difference]: With dead ends: 2693 [2021-03-11 00:00:50,750 INFO L226 Difference]: Without dead ends: 2693 [2021-03-11 00:00:50,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:00:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-11 00:00:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-03-11 00:00:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-03-11 00:00:50,782 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-03-11 00:00:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:50,782 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-03-11 00:00:50,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-03-11 00:00:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:50,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:50,784 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:50,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-11 00:00:50,995 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:50,995 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-03-11 00:00:50,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:50,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355334063] [2021-03-11 00:00:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:51,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355334063] [2021-03-11 00:00:51,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294828561] [2021-03-11 00:00:51,038 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 [2021-03-11 00:00:51,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:51,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:51,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:51,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:51,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296029119] [2021-03-11 00:00:51,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:51,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:51,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:51,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:51,148 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:51,772 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-03-11 00:00:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:00:51,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:51,779 INFO L225 Difference]: With dead ends: 2677 [2021-03-11 00:00:51,779 INFO L226 Difference]: Without dead ends: 2677 [2021-03-11 00:00:51,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 361.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:00:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-11 00:00:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-03-11 00:00:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-03-11 00:00:51,813 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-03-11 00:00:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:51,814 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-03-11 00:00:51,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-03-11 00:00:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:51,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:51,817 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:52,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-11 00:00:52,033 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-03-11 00:00:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:52,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283949946] [2021-03-11 00:00:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:52,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283949946] [2021-03-11 00:00:52,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973379407] [2021-03-11 00:00:52,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:52,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:00:52,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:52,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:52,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:52,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:52,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:52,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440899097] [2021-03-11 00:00:52,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:52,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:52,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:52,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:52,151 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:52,701 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-03-11 00:00:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:00:52,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:52,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:52,706 INFO L225 Difference]: With dead ends: 2474 [2021-03-11 00:00:52,706 INFO L226 Difference]: Without dead ends: 2470 [2021-03-11 00:00:52,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:00:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-11 00:00:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-03-11 00:00:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-03-11 00:00:52,736 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-03-11 00:00:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:52,736 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-03-11 00:00:52,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-03-11 00:00:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:52,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:52,738 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:52,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-11 00:00:52,951 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:52,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-03-11 00:00:52,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:52,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272741566] [2021-03-11 00:00:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272741566] [2021-03-11 00:00:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710261588] [2021-03-11 00:00:52,993 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) [2021-03-11 00:00:53,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:00:53,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:53,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:53,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:53,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:53,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943665510] [2021-03-11 00:00:53,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:53,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:53,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:53,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:53,116 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:53,809 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-03-11 00:00:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:00:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:53,815 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:00:53,815 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:00:53,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:00:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:00:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-03-11 00:00:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-03-11 00:00:53,846 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-03-11 00:00:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:53,846 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-03-11 00:00:53,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-03-11 00:00:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:53,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:53,849 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:54,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:00:54,071 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-03-11 00:00:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:54,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855522750] [2021-03-11 00:00:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:54,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855522750] [2021-03-11 00:00:54,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140875608] [2021-03-11 00:00:54,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:54,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:54,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:54,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:54,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:54,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107048422] [2021-03-11 00:00:54,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:54,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:54,237 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:54,809 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-03-11 00:00:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:00:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:54,816 INFO L225 Difference]: With dead ends: 2332 [2021-03-11 00:00:54,816 INFO L226 Difference]: Without dead ends: 2328 [2021-03-11 00:00:54,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:00:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-11 00:00:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-03-11 00:00:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-03-11 00:00:54,844 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-03-11 00:00:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:54,844 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-03-11 00:00:54,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-03-11 00:00:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:54,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:54,847 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:55,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:00:55,063 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-03-11 00:00:55,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:55,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804312880] [2021-03-11 00:00:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:55,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804312880] [2021-03-11 00:00:55,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031339331] [2021-03-11 00:00:55,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:00:55,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:00:55,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:00:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:55,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:55,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:00:55,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657955421] [2021-03-11 00:00:55,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:00:55,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:55,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:00:55,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:00:55,172 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:55,257 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-03-11 00:00:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:00:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:55,264 INFO L225 Difference]: With dead ends: 929 [2021-03-11 00:00:55,264 INFO L226 Difference]: Without dead ends: 929 [2021-03-11 00:00:55,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-11 00:00:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-03-11 00:00:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-03-11 00:00:55,291 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-03-11 00:00:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:55,291 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-03-11 00:00:55,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-03-11 00:00:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:55,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:55,294 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:55,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:55,515 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:55,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-03-11 00:00:55,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:55,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273114872] [2021-03-11 00:00:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:55,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273114872] [2021-03-11 00:00:55,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141024935] [2021-03-11 00:00:55,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:55,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:55,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:55,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:55,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:00:55,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963907679] [2021-03-11 00:00:55,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:00:55,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:00:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:00:55,672 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:55,953 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-03-11 00:00:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:00:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:55,960 INFO L225 Difference]: With dead ends: 1555 [2021-03-11 00:00:55,960 INFO L226 Difference]: Without dead ends: 1555 [2021-03-11 00:00:55,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:00:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-03-11 00:00:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-03-11 00:00:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-03-11 00:00:55,979 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-03-11 00:00:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:55,979 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-03-11 00:00:55,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-03-11 00:00:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:55,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:55,981 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:56,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:56,195 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-03-11 00:00:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:56,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97226316] [2021-03-11 00:00:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:56,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97226316] [2021-03-11 00:00:56,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7630341] [2021-03-11 00:00:56,225 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 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 [2021-03-11 00:00:56,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:00:56,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:56,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:56,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:00:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201938708] [2021-03-11 00:00:56,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:00:56,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:56,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:00:56,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:00:56,319 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:56,554 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-03-11 00:00:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:00:56,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:56,567 INFO L225 Difference]: With dead ends: 1605 [2021-03-11 00:00:56,567 INFO L226 Difference]: Without dead ends: 1605 [2021-03-11 00:00:56,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:00:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-11 00:00:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-03-11 00:00:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-03-11 00:00:56,587 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-03-11 00:00:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:56,587 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-03-11 00:00:56,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-03-11 00:00:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:56,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:56,590 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:56,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:56,811 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-03-11 00:00:56,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:56,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284229121] [2021-03-11 00:00:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:56,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284229121] [2021-03-11 00:00:56,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284282656] [2021-03-11 00:00:56,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:56,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:00:56,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:56,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:00:56,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916520623] [2021-03-11 00:00:56,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:00:56,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:00:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:00:56,918 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:57,141 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-03-11 00:00:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:00:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:57,145 INFO L225 Difference]: With dead ends: 1524 [2021-03-11 00:00:57,145 INFO L226 Difference]: Without dead ends: 1520 [2021-03-11 00:00:57,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:00:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-11 00:00:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-03-11 00:00:57,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-03-11 00:00:57,164 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-03-11 00:00:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:57,164 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-03-11 00:00:57,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-03-11 00:00:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:57,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:57,166 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:57,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-03-11 00:00:57,387 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-03-11 00:00:57,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:57,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788827176] [2021-03-11 00:00:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:57,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788827176] [2021-03-11 00:00:57,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456681099] [2021-03-11 00:00:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:57,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:00:57,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:57,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:57,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:57,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:00:57,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634883352] [2021-03-11 00:00:57,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:00:57,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:00:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:00:57,491 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:57,724 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-03-11 00:00:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:00:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:57,726 INFO L225 Difference]: With dead ends: 1508 [2021-03-11 00:00:57,726 INFO L226 Difference]: Without dead ends: 1496 [2021-03-11 00:00:57,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:00:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-11 00:00:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-03-11 00:00:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-03-11 00:00:57,744 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-03-11 00:00:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:57,745 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-03-11 00:00:57,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-03-11 00:00:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:57,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:57,747 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:57,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:57,968 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-03-11 00:00:57,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:57,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033632295] [2021-03-11 00:00:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:58,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033632295] [2021-03-11 00:00:58,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79089961] [2021-03-11 00:00:58,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:58,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:00:58,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:58,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:58,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:58,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:58,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:58,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202038536] [2021-03-11 00:00:58,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:58,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:58,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:58,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:58,102 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:58,618 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-03-11 00:00:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:00:58,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:58,622 INFO L225 Difference]: With dead ends: 2412 [2021-03-11 00:00:58,622 INFO L226 Difference]: Without dead ends: 2412 [2021-03-11 00:00:58,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:00:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-11 00:00:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-03-11 00:00:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-03-11 00:00:58,674 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-03-11 00:00:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:58,675 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-03-11 00:00:58,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-03-11 00:00:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:58,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:58,677 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:58,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-11 00:00:58,898 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-03-11 00:00:58,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:58,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678534534] [2021-03-11 00:00:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:58,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678534534] [2021-03-11 00:00:58,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388460114] [2021-03-11 00:00:58,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:58,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:59,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:59,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:00:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186778157] [2021-03-11 00:00:59,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:00:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:00:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:00:59,082 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:59,562 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-03-11 00:00:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:00:59,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:00:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:59,565 INFO L225 Difference]: With dead ends: 2335 [2021-03-11 00:00:59,565 INFO L226 Difference]: Without dead ends: 2335 [2021-03-11 00:00:59,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:00:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-03-11 00:00:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-03-11 00:00:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:00:59,584 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:00:59,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:59,584 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:00:59,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:00:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:00:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:00:59,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:59,586 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:00:59,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:59,799 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:59,799 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-03-11 00:00:59,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:59,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840389780] [2021-03-11 00:00:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:59,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840389780] [2021-03-11 00:00:59,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628925589] [2021-03-11 00:00:59,840 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 [2021-03-11 00:00:59,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:00:59,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:00:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:59,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:59,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:00:59,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57035915] [2021-03-11 00:00:59,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:00:59,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:59,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:00:59,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:00:59,929 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:00,324 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-03-11 00:01:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:01:00,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:00,327 INFO L225 Difference]: With dead ends: 2285 [2021-03-11 00:01:00,327 INFO L226 Difference]: Without dead ends: 2285 [2021-03-11 00:01:00,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:01:00,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-11 00:01:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-03-11 00:01:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:01:00,349 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:01:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:00,349 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:01:00,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:01:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:00,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:00,351 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:00,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-11 00:01:00,560 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-03-11 00:01:00,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:00,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654826768] [2021-03-11 00:01:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:00,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654826768] [2021-03-11 00:01:00,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001617469] [2021-03-11 00:01:00,611 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 [2021-03-11 00:01:00,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:01:00,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:00,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:00,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:00,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:00,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:01:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233947348] [2021-03-11 00:01:00,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:01:00,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:01:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:01:00,724 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:01,068 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-03-11 00:01:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:01:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:01,071 INFO L225 Difference]: With dead ends: 2176 [2021-03-11 00:01:01,071 INFO L226 Difference]: Without dead ends: 2172 [2021-03-11 00:01:01,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:01:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-11 00:01:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-03-11 00:01:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:01:01,088 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:01:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:01,089 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:01:01,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:01:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:01,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:01,091 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:01,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:01,291 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:01,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-03-11 00:01:01,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:01,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610850412] [2021-03-11 00:01:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:01,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610850412] [2021-03-11 00:01:01,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002011344] [2021-03-11 00:01:01,329 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 [2021-03-11 00:01:01,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:01:01,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:01,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:01,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:01,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:01,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:01:01,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695698721] [2021-03-11 00:01:01,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:01:01,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:01,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:01:01,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:01:01,441 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:01,848 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-03-11 00:01:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:01:01,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:01,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:01,851 INFO L225 Difference]: With dead ends: 2199 [2021-03-11 00:01:01,851 INFO L226 Difference]: Without dead ends: 2199 [2021-03-11 00:01:01,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:01:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-11 00:01:01,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-03-11 00:01:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:01:01,867 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:01:01,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:01,867 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:01:01,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:01:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:01,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:01,869 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:02,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-11 00:01:02,069 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:02,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-03-11 00:01:02,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:02,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991741801] [2021-03-11 00:01:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:02,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991741801] [2021-03-11 00:01:02,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964064599] [2021-03-11 00:01:02,103 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 [2021-03-11 00:01:02,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:01:02,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:02,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:02,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:02,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:01:02,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093034099] [2021-03-11 00:01:02,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:01:02,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:02,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:01:02,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:01:02,226 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:02,626 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-03-11 00:01:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:01:02,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:02,630 INFO L225 Difference]: With dead ends: 2156 [2021-03-11 00:01:02,630 INFO L226 Difference]: Without dead ends: 2152 [2021-03-11 00:01:02,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:01:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-11 00:01:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-03-11 00:01:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:01:02,654 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:01:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:02,654 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:01:02,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:01:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:02,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:02,656 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:02,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-11 00:01:02,875 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:02,876 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-03-11 00:01:02,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:02,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926027205] [2021-03-11 00:01:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:02,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926027205] [2021-03-11 00:01:02,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204528642] [2021-03-11 00:01:02,911 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 [2021-03-11 00:01:02,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:01:02,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:02,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:03,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:03,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:01:03,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399056399] [2021-03-11 00:01:03,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:01:03,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:03,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:01:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:01:03,004 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:03,336 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-03-11 00:01:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:01:03,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:03,339 INFO L225 Difference]: With dead ends: 2097 [2021-03-11 00:01:03,339 INFO L226 Difference]: Without dead ends: 2097 [2021-03-11 00:01:03,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:01:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-11 00:01:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-03-11 00:01:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-03-11 00:01:03,357 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-03-11 00:01:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:03,357 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-03-11 00:01:03,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-03-11 00:01:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:03,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:03,359 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:03,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:03,559 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-03-11 00:01:03,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:03,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764603675] [2021-03-11 00:01:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764603675] [2021-03-11 00:01:03,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435385839] [2021-03-11 00:01:03,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:01:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:03,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:03,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:03,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:03,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:01:03,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991948929] [2021-03-11 00:01:03,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:01:03,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:01:03,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:01:03,708 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:03,978 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-03-11 00:01:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:01:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:03,982 INFO L225 Difference]: With dead ends: 1963 [2021-03-11 00:01:03,982 INFO L226 Difference]: Without dead ends: 1959 [2021-03-11 00:01:03,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:01:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-03-11 00:01:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-03-11 00:01:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-03-11 00:01:04,014 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-03-11 00:01:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:04,015 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-03-11 00:01:04,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-03-11 00:01:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:04,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:04,017 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:04,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-03-11 00:01:04,231 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:04,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-03-11 00:01:04,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:04,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493140301] [2021-03-11 00:01:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:04,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493140301] [2021-03-11 00:01:04,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207361445] [2021-03-11 00:01:04,265 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 [2021-03-11 00:01:04,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:01:04,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:04,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:04,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:01:04,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751250625] [2021-03-11 00:01:04,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:01:04,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:04,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:01:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:01:04,344 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:04,585 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-03-11 00:01:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:01:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:04,588 INFO L225 Difference]: With dead ends: 1728 [2021-03-11 00:01:04,588 INFO L226 Difference]: Without dead ends: 1716 [2021-03-11 00:01:04,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:01:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-03-11 00:01:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-03-11 00:01:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-03-11 00:01:04,603 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-03-11 00:01:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:04,603 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-03-11 00:01:04,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-03-11 00:01:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:04,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:04,605 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:04,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:04,825 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:04,826 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-03-11 00:01:04,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:04,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476813643] [2021-03-11 00:01:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:04,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476813643] [2021-03-11 00:01:04,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101056214] [2021-03-11 00:01:04,866 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 [2021-03-11 00:01:04,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:01:04,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:04,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:04,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:04,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:01:04,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488044979] [2021-03-11 00:01:04,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:01:04,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:04,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:01:04,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:01:04,974 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:05,288 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-03-11 00:01:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:01:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:05,291 INFO L225 Difference]: With dead ends: 1821 [2021-03-11 00:01:05,291 INFO L226 Difference]: Without dead ends: 1821 [2021-03-11 00:01:05,291 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:01:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-11 00:01:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-03-11 00:01:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-03-11 00:01:05,308 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-03-11 00:01:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:05,308 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-03-11 00:01:05,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-03-11 00:01:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:05,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:05,309 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:05,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-11 00:01:05,510 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-03-11 00:01:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:05,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68896983] [2021-03-11 00:01:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:05,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68896983] [2021-03-11 00:01:05,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275132581] [2021-03-11 00:01:05,545 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 [2021-03-11 00:01:05,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:01:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:05,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:05,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:01:05,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632731448] [2021-03-11 00:01:05,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:01:05,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:01:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:01:05,631 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:05,896 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-03-11 00:01:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:01:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:05,899 INFO L225 Difference]: With dead ends: 1790 [2021-03-11 00:01:05,899 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:01:05,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:01:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:01:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-03-11 00:01:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-03-11 00:01:05,924 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-03-11 00:01:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:05,924 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-03-11 00:01:05,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-03-11 00:01:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:01:05,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:05,926 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:06,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-11 00:01:06,146 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-03-11 00:01:06,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:06,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164035730] [2021-03-11 00:01:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:06,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164035730] [2021-03-11 00:01:06,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21964958] [2021-03-11 00:01:06,185 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 [2021-03-11 00:01:06,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:01:06,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:06,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:01:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:06,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:06,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:01:06,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183553801] [2021-03-11 00:01:06,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:01:06,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:06,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:01:06,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:01:06,275 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:06,437 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-03-11 00:01:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:01:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:01:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:06,440 INFO L225 Difference]: With dead ends: 1649 [2021-03-11 00:01:06,440 INFO L226 Difference]: Without dead ends: 1637 [2021-03-11 00:01:06,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-03-11 00:01:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-03-11 00:01:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-03-11 00:01:06,454 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-03-11 00:01:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:06,454 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-03-11 00:01:06,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-03-11 00:01:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:06,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:06,456 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:06,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:06,656 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:06,656 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-03-11 00:01:06,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:06,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448383266] [2021-03-11 00:01:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:06,956 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:01:07,076 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:01:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:07,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448383266] [2021-03-11 00:01:07,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567090693] [2021-03-11 00:01:07,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:07,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:01:07,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:07,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:07,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:07,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:07,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:07,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:01:07,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:07,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:07,916 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:07,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:07,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:07,944 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:01:07,952 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:07,960 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:07,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:07,975 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:01:07,984 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:07,991 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:07,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:07,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:07,996 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:08,072 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:01:08,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:01:08,075 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:01:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:08,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:08,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:01:08,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008324098] [2021-03-11 00:01:08,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:01:08,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:08,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:01:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:01:08,141 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:08,761 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:01:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:09,019 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-03-11 00:01:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:01:09,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:09,021 INFO L225 Difference]: With dead ends: 1517 [2021-03-11 00:01:09,021 INFO L226 Difference]: Without dead ends: 1502 [2021-03-11 00:01:09,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1383.9ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:01:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-11 00:01:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-03-11 00:01:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-03-11 00:01:09,035 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-03-11 00:01:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:09,035 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-03-11 00:01:09,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-03-11 00:01:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:09,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:09,037 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:09,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-11 00:01:09,238 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:09,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:09,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-03-11 00:01:09,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:09,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7597001] [2021-03-11 00:01:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:09,579 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-11 00:01:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:09,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7597001] [2021-03-11 00:01:09,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374775030] [2021-03-11 00:01:09,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:09,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:01:09,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:09,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:10,434 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-11 00:01:10,491 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3, v_prenex_5], 2=[A, v_prenex_7]} [2021-03-11 00:01:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:10,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:01:10,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:10,659 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-11 00:01:10,660 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.1 percent of original size [2021-03-11 00:01:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:10,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:10,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:10,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:10,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:10,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:10,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:10,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:10,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:10,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:10,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:10,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:10,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:10,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:10,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:10,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:01:10,818 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:211, output treesize:51 [2021-03-11 00:01:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:10,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:10,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:01:10,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959609243] [2021-03-11 00:01:10,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:01:10,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:01:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:01:10,886 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:11,477 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-11 00:01:11,729 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-11 00:01:11,879 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-11 00:01:12,040 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:01:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:12,585 INFO L93 Difference]: Finished difference Result 1547 states and 4937 transitions. [2021-03-11 00:01:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:01:12,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:12,588 INFO L225 Difference]: With dead ends: 1547 [2021-03-11 00:01:12,588 INFO L226 Difference]: Without dead ends: 1502 [2021-03-11 00:01:12,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2163.2ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:01:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-11 00:01:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1171. [2021-03-11 00:01:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.347008547008547) internal successors, (3916), 1170 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3916 transitions. [2021-03-11 00:01:12,602 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3916 transitions. Word has length 26 [2021-03-11 00:01:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:12,603 INFO L480 AbstractCegarLoop]: Abstraction has 1171 states and 3916 transitions. [2021-03-11 00:01:12,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3916 transitions. [2021-03-11 00:01:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:12,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:12,605 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:12,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:12,805 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:12,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-03-11 00:01:12,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:12,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164597269] [2021-03-11 00:01:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:13,201 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:01:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:13,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164597269] [2021-03-11 00:01:13,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824038118] [2021-03-11 00:01:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:13,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:01:13,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:13,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:14,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:01:14,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:01:14,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:01:14,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:01:14,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:01:14,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:01:14,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:01:14,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:01:14,178 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:01:14,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:01:14,196 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:01:14,204 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:01:14,215 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:01:14,224 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:01:14,232 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:14,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:14,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:01:14,237 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:14,263 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-11 00:01:14,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:01:14,264 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:01:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:14,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:14,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:01:14,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561265910] [2021-03-11 00:01:14,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:14,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:14,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:14,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:14,298 INFO L87 Difference]: Start difference. First operand 1171 states and 3916 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:14,738 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2021-03-11 00:01:15,648 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2021-03-11 00:01:15,884 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-03-11 00:01:16,054 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-03-11 00:01:16,190 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-03-11 00:01:16,537 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2021-03-11 00:01:16,730 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-03-11 00:01:16,996 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-11 00:01:17,160 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2021-03-11 00:01:17,455 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-11 00:01:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:17,566 INFO L93 Difference]: Finished difference Result 1671 states and 5380 transitions. [2021-03-11 00:01:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:01:17,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:17,569 INFO L225 Difference]: With dead ends: 1671 [2021-03-11 00:01:17,569 INFO L226 Difference]: Without dead ends: 1656 [2021-03-11 00:01:17,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 3436.3ms TimeCoverageRelationStatistics Valid=375, Invalid=1881, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:01:17,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-03-11 00:01:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1201. [2021-03-11 00:01:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3316666666666666) internal successors, (3998), 1200 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3998 transitions. [2021-03-11 00:01:17,584 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3998 transitions. Word has length 26 [2021-03-11 00:01:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:17,584 INFO L480 AbstractCegarLoop]: Abstraction has 1201 states and 3998 transitions. [2021-03-11 00:01:17,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3998 transitions. [2021-03-11 00:01:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:17,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:17,586 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:17,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-11 00:01:17,786 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:17,787 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-03-11 00:01:17,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:17,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853598225] [2021-03-11 00:01:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:18,023 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-11 00:01:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:18,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853598225] [2021-03-11 00:01:18,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637859497] [2021-03-11 00:01:18,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:18,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:01:18,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,744 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:18,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:01:18,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:18,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-03-11 00:01:18,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:18,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-03-11 00:01:18,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,797 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:18,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-03-11 00:01:18,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,811 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:18,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-03-11 00:01:18,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,823 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-03-11 00:01:18,824 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:18,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-03-11 00:01:18,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,847 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:18,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-03-11 00:01:18,848 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:18,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-03-11 00:01:18,860 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,870 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:18,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-03-11 00:01:18,871 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,883 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:18,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-03-11 00:01:18,884 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:18,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:01:18,904 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:18,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-03-11 00:01:18,924 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,941 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:18,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-03-11 00:01:18,943 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:18,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-03-11 00:01:18,990 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:18,997 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-03-11 00:01:18,998 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:19,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:19,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:19,081 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-03-11 00:01:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:19,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:19,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:01:19,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786490485] [2021-03-11 00:01:19,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:19,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:19,339 INFO L87 Difference]: Start difference. First operand 1201 states and 3998 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:19,940 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-03-11 00:01:20,188 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-03-11 00:01:20,341 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-03-11 00:01:20,497 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-03-11 00:01:20,643 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-03-11 00:01:21,054 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-03-11 00:01:21,274 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2021-03-11 00:01:21,611 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2021-03-11 00:01:21,771 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-03-11 00:01:22,100 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-03-11 00:01:22,410 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-11 00:01:22,727 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2021-03-11 00:01:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:22,853 INFO L93 Difference]: Finished difference Result 1873 states and 5950 transitions. [2021-03-11 00:01:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:01:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:22,856 INFO L225 Difference]: With dead ends: 1873 [2021-03-11 00:01:22,856 INFO L226 Difference]: Without dead ends: 1858 [2021-03-11 00:01:22,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3595.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:01:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-03-11 00:01:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1210. [2021-03-11 00:01:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.339950372208437) internal successors, (4038), 1209 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4038 transitions. [2021-03-11 00:01:22,873 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4038 transitions. Word has length 26 [2021-03-11 00:01:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:22,873 INFO L480 AbstractCegarLoop]: Abstraction has 1210 states and 4038 transitions. [2021-03-11 00:01:22,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4038 transitions. [2021-03-11 00:01:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:22,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:22,875 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:23,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:23,076 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-03-11 00:01:23,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:23,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862405866] [2021-03-11 00:01:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:23,302 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-11 00:01:23,420 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-11 00:01:23,574 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-11 00:01:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:23,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862405866] [2021-03-11 00:01:23,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8430871] [2021-03-11 00:01:23,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:01:24,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:01:24,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:01:24,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:01:24,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:01:24,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:01:24,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:01:24,531 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:01:24,544 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:01:24,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:01:24,566 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:01:24,576 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:01:24,586 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:01:24,598 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:01:24,608 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:24,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:24,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:01:24,615 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:24,646 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-11 00:01:24,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:01:24,648 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:01:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:24,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:24,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:01:24,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458063806] [2021-03-11 00:01:24,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:24,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:24,692 INFO L87 Difference]: Start difference. First operand 1210 states and 4038 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:25,181 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2021-03-11 00:01:26,135 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-03-11 00:01:26,288 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-03-11 00:01:26,428 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2021-03-11 00:01:26,590 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-03-11 00:01:26,749 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2021-03-11 00:01:26,971 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-03-11 00:01:27,167 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2021-03-11 00:01:27,365 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2021-03-11 00:01:27,740 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:01:27,912 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-03-11 00:01:28,062 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-03-11 00:01:28,214 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-03-11 00:01:28,529 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-11 00:01:28,753 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-03-11 00:01:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:28,911 INFO L93 Difference]: Finished difference Result 1907 states and 6071 transitions. [2021-03-11 00:01:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:01:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:28,914 INFO L225 Difference]: With dead ends: 1907 [2021-03-11 00:01:28,914 INFO L226 Difference]: Without dead ends: 1892 [2021-03-11 00:01:28,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 4313.1ms TimeCoverageRelationStatistics Valid=479, Invalid=2277, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:01:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-03-11 00:01:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1221. [2021-03-11 00:01:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 3.3459016393442624) internal successors, (4082), 1220 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 4082 transitions. [2021-03-11 00:01:28,930 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 4082 transitions. Word has length 26 [2021-03-11 00:01:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:28,930 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 4082 transitions. [2021-03-11 00:01:28,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 4082 transitions. [2021-03-11 00:01:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:28,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:28,932 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:29,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-03-11 00:01:29,133 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-03-11 00:01:29,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:29,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922427437] [2021-03-11 00:01:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:29,343 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-03-11 00:01:29,468 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-11 00:01:29,625 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-03-11 00:01:29,742 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-11 00:01:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:29,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922427437] [2021-03-11 00:01:29,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532001996] [2021-03-11 00:01:29,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:29,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:01:29,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:29,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,726 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:01:30,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-03-11 00:01:30,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,769 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-03-11 00:01:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-03-11 00:01:30,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,810 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-11 00:01:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-03-11 00:01:30,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,850 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-11 00:01:30,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:01:30,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,892 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-03-11 00:01:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-03-11 00:01:30,896 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,913 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:01:30,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:01:30,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,930 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:01:30,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:01:30,931 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,952 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-03-11 00:01:30,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-03-11 00:01:30,954 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,976 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:01:30,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:01:30,977 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:30,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:30,998 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:01:30,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:01:30,999 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:31,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,020 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:01:31,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:01:31,021 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:31,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,053 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-03-11 00:01:31,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-03-11 00:01:31,055 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:31,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:31,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-03-11 00:01:31,091 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,114 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:01:31,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:01:31,115 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,131 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:01:31,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:01:31,131 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:31,142 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-11 00:01:31,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:01:31,143 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:31,272 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-11 00:01:31,272 INFO L628 ElimStorePlain]: treesize reduction 91, result has 59.4 percent of original size [2021-03-11 00:01:31,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:01:31,274 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-03-11 00:01:31,405 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-03-11 00:01:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:31,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:31,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:01:31,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256238185] [2021-03-11 00:01:31,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:01:31,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:01:31,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:01:31,457 INFO L87 Difference]: Start difference. First operand 1221 states and 4082 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:32,449 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-03-11 00:01:33,259 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-03-11 00:01:33,432 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-03-11 00:01:33,807 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-03-11 00:01:34,520 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-03-11 00:01:34,656 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:01:35,010 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-03-11 00:01:35,161 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-03-11 00:01:35,348 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-03-11 00:01:35,759 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-03-11 00:01:36,146 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-03-11 00:01:36,366 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2021-03-11 00:01:36,718 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-03-11 00:01:36,965 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-03-11 00:01:37,147 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2021-03-11 00:01:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:37,300 INFO L93 Difference]: Finished difference Result 2629 states and 8153 transitions. [2021-03-11 00:01:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:01:37,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:37,304 INFO L225 Difference]: With dead ends: 2629 [2021-03-11 00:01:37,304 INFO L226 Difference]: Without dead ends: 2584 [2021-03-11 00:01:37,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 6231.8ms TimeCoverageRelationStatistics Valid=599, Invalid=3691, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:01:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-03-11 00:01:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1396. [2021-03-11 00:01:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.3161290322580643) internal successors, (4626), 1395 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4626 transitions. [2021-03-11 00:01:37,325 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4626 transitions. Word has length 26 [2021-03-11 00:01:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:37,325 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4626 transitions. [2021-03-11 00:01:37,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4626 transitions. [2021-03-11 00:01:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:37,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:37,327 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:37,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-03-11 00:01:37,527 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-03-11 00:01:37,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:37,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777337222] [2021-03-11 00:01:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:37,831 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-11 00:01:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:38,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777337222] [2021-03-11 00:01:38,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159672617] [2021-03-11 00:01:38,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:38,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:38,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:38,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:38,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:38,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:38,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:01:38,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:38,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:38,630 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:38,638 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:38,645 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:01:38,654 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:38,661 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:01:38,670 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:38,679 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:38,685 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:38,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:38,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:38,691 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:38,775 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:01:38,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:01:38,777 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:01:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:38,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:38,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:01:38,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504775961] [2021-03-11 00:01:38,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:01:38,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:01:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:01:38,832 INFO L87 Difference]: Start difference. First operand 1396 states and 4626 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:39,431 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-11 00:01:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:39,991 INFO L93 Difference]: Finished difference Result 1801 states and 5846 transitions. [2021-03-11 00:01:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:01:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:39,995 INFO L225 Difference]: With dead ends: 1801 [2021-03-11 00:01:39,995 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:01:39,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1567.7ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:01:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:01:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1407. [2021-03-11 00:01:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.313655761024182) internal successors, (4659), 1406 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4659 transitions. [2021-03-11 00:01:40,014 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4659 transitions. Word has length 26 [2021-03-11 00:01:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:40,014 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4659 transitions. [2021-03-11 00:01:40,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4659 transitions. [2021-03-11 00:01:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:40,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:40,016 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:40,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:40,217 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:40,217 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-03-11 00:01:40,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:40,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793783018] [2021-03-11 00:01:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:40,446 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:01:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:40,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793783018] [2021-03-11 00:01:40,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37512849] [2021-03-11 00:01:40,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:40,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:01:40,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:01:40,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:41,213 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:01:41,314 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:41,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:01:41,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:41,461 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-11 00:01:41,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:41,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:41,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:01:41,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:41,622 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 00:01:41,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:41,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:41,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:01:41,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:41,783 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:01:41,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:41,803 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:01:41,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:01:41,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:41,944 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-11 00:01:41,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:41,965 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:41,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:01:41,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:42,105 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:01:42,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:42,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:42,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:01:42,126 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:42,264 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-11 00:01:42,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:42,283 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:01:42,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:01:42,284 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:42,417 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-11 00:01:42,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:42,439 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:42,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:01:42,443 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:42,571 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-11 00:01:42,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:42,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:42,588 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:376 [2021-03-11 00:01:42,933 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:01:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:43,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:43,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:01:43,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3928585] [2021-03-11 00:01:43,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:43,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:43,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:43,064 INFO L87 Difference]: Start difference. First operand 1407 states and 4659 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:43,667 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-03-11 00:01:44,001 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-03-11 00:01:44,135 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-11 00:01:44,356 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-03-11 00:01:44,509 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:01:44,767 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:01:45,247 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-03-11 00:01:45,491 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-03-11 00:01:45,895 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-03-11 00:01:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:46,020 INFO L93 Difference]: Finished difference Result 1848 states and 5971 transitions. [2021-03-11 00:01:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:01:46,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:46,023 INFO L225 Difference]: With dead ends: 1848 [2021-03-11 00:01:46,023 INFO L226 Difference]: Without dead ends: 1833 [2021-03-11 00:01:46,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3597.8ms TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:01:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-03-11 00:01:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1415. [2021-03-11 00:01:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 3.3125884016973126) internal successors, (4684), 1414 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 4684 transitions. [2021-03-11 00:01:46,041 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 4684 transitions. Word has length 26 [2021-03-11 00:01:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:46,041 INFO L480 AbstractCegarLoop]: Abstraction has 1415 states and 4684 transitions. [2021-03-11 00:01:46,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 4684 transitions. [2021-03-11 00:01:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:46,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:46,043 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:46,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-03-11 00:01:46,244 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-03-11 00:01:46,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:46,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869336115] [2021-03-11 00:01:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:46,449 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-03-11 00:01:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869336115] [2021-03-11 00:01:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166030452] [2021-03-11 00:01:46,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:46,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:01:46,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:47,261 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-11 00:01:47,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:47,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:47,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:47,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:47,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:47,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:47,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-03-11 00:01:47,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:47,760 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-03-11 00:01:47,760 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.0 percent of original size [2021-03-11 00:01:47,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:47,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:47,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:47,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:47,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:47,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:47,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:47,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:47,850 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:47,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:47,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:47,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:47,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:47,929 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:47,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:47,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:01:47,983 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:309, output treesize:51 [2021-03-11 00:01:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:48,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:48,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:01:48,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13493589] [2021-03-11 00:01:48,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:01:48,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:01:48,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:01:48,041 INFO L87 Difference]: Start difference. First operand 1415 states and 4684 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:48,789 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 49 [2021-03-11 00:01:49,046 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-03-11 00:01:49,276 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-03-11 00:01:49,622 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-03-11 00:01:49,951 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-03-11 00:01:50,184 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-11 00:01:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:50,275 INFO L93 Difference]: Finished difference Result 1769 states and 5693 transitions. [2021-03-11 00:01:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:01:50,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:50,278 INFO L225 Difference]: With dead ends: 1769 [2021-03-11 00:01:50,278 INFO L226 Difference]: Without dead ends: 1754 [2021-03-11 00:01:50,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2735.0ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:01:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-03-11 00:01:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1433. [2021-03-11 00:01:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.3170391061452515) internal successors, (4750), 1432 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4750 transitions. [2021-03-11 00:01:50,296 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4750 transitions. Word has length 26 [2021-03-11 00:01:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:50,296 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 4750 transitions. [2021-03-11 00:01:50,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4750 transitions. [2021-03-11 00:01:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:50,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:50,299 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:50,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-03-11 00:01:50,499 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:50,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:50,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-03-11 00:01:50,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:50,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865118979] [2021-03-11 00:01:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:50,700 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:01:50,828 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-11 00:01:50,943 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:01:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865118979] [2021-03-11 00:01:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614017845] [2021-03-11 00:01:51,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:51,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:01:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:01:51,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:51,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:51,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:01:51,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:51,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:51,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:51,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:51,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:01:51,681 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:51,687 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:51,694 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:51,700 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:01:51,708 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:51,719 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:51,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:51,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:51,723 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:51,803 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:01:51,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:01:51,805 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:01:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:51,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:51,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:01:51,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473078614] [2021-03-11 00:01:51,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:01:51,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:51,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:01:51,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:01:51,870 INFO L87 Difference]: Start difference. First operand 1433 states and 4750 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:52,693 INFO L93 Difference]: Finished difference Result 1743 states and 5703 transitions. [2021-03-11 00:01:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:01:52,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:52,696 INFO L225 Difference]: With dead ends: 1743 [2021-03-11 00:01:52,696 INFO L226 Difference]: Without dead ends: 1728 [2021-03-11 00:01:52,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1349.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:01:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-03-11 00:01:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1442. [2021-03-11 00:01:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-03-11 00:01:52,714 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-03-11 00:01:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:52,714 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-03-11 00:01:52,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-03-11 00:01:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:52,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:52,716 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:52,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-03-11 00:01:52,916 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-03-11 00:01:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:52,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273168548] [2021-03-11 00:01:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:53,238 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:01:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:53,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273168548] [2021-03-11 00:01:53,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541717577] [2021-03-11 00:01:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:53,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:01:53,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:53,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:53,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:53,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:53,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:53,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:53,922 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:53,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:53,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:53,936 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:53,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:01:53,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:53,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:53,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:01:53,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:53,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:53,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:01:53,966 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:53,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:53,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:53,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:01:53,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:53,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:53,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:01:53,997 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:54,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:54,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:54,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:01:54,021 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:54,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:01:54,034 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:54,045 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:54,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:01:54,072 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,085 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:54,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:01:54,086 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,095 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:54,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:01:54,096 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,104 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:54,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:54,105 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,111 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:54,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:54,112 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:54,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:54,208 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-03-11 00:01:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:54,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:54,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:01:54,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041802351] [2021-03-11 00:01:54,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:01:54,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:01:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:01:54,421 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:55,132 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-03-11 00:01:55,639 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-03-11 00:01:55,808 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-03-11 00:01:56,062 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-03-11 00:01:56,266 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-11 00:01:56,460 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-11 00:01:57,159 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-11 00:01:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:57,440 INFO L93 Difference]: Finished difference Result 2256 states and 7236 transitions. [2021-03-11 00:01:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:01:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:01:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:57,444 INFO L225 Difference]: With dead ends: 2256 [2021-03-11 00:01:57,444 INFO L226 Difference]: Without dead ends: 2226 [2021-03-11 00:01:57,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3123.7ms TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:01:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-03-11 00:01:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1442. [2021-03-11 00:01:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-03-11 00:01:57,465 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-03-11 00:01:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:57,465 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-03-11 00:01:57,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-03-11 00:01:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:57,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:57,468 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:01:57,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-03-11 00:01:57,683 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:57,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:57,683 INFO L82 PathProgramCache]: Analyzing trace with hash -249530138, now seen corresponding path program 12 times [2021-03-11 00:01:57,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:57,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112264479] [2021-03-11 00:01:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:57,899 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-11 00:01:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:58,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112264479] [2021-03-11 00:01:58,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57157395] [2021-03-11 00:01:58,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:58,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:01:58,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,485 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:58,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:58,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,496 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:58,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:01:58,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,506 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:58,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:58,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,520 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:58,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:01:58,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,534 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:58,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:01:58,536 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:58,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:01:58,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,558 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:58,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:01:58,559 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:58,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:01:58,572 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:58,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:01:58,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:58,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:01:58,598 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,607 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:58,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:01:58,608 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:01:58,629 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,641 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:58,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:01:58,643 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:58,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:01:58,658 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,666 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:58,667 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:58,673 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:58,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:58,674 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:58,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:58,756 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:01:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:58,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:58,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:01:58,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546976498] [2021-03-11 00:01:58,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:58,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:58,977 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:01:59,435 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-03-11 00:01:59,703 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-03-11 00:01:59,841 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-11 00:02:00,228 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-03-11 00:02:00,381 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-11 00:02:00,780 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-11 00:02:01,016 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-11 00:02:01,186 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-03-11 00:02:01,860 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-03-11 00:02:02,123 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-03-11 00:02:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:02,194 INFO L93 Difference]: Finished difference Result 2069 states and 6722 transitions. [2021-03-11 00:02:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:02:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:02,197 INFO L225 Difference]: With dead ends: 2069 [2021-03-11 00:02:02,197 INFO L226 Difference]: Without dead ends: 2054 [2021-03-11 00:02:02,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3329.3ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:02:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-03-11 00:02:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1442. [2021-03-11 00:02:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-03-11 00:02:02,217 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-03-11 00:02:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:02,217 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-03-11 00:02:02,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-03-11 00:02:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:02,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:02,219 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:02,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:02,419 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:02,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-03-11 00:02:02,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:02,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858325239] [2021-03-11 00:02:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:02,733 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-11 00:02:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:03,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858325239] [2021-03-11 00:02:03,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076236459] [2021-03-11 00:02:03,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:02:03,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:02:03,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:02:03,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:03,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:02:03,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:02:03,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:02:03,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:02:03,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:02:03,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:02:03,859 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:02:03,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:02:03,880 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:02:03,891 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:02:03,901 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:02:03,911 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:02:03,922 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:02:03,931 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:02:03,940 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:03,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:03,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:02:03,945 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:03,975 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-03-11 00:02:03,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:02:03,976 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:02:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:04,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:04,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:02:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271546790] [2021-03-11 00:02:04,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:04,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:04,004 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:04,472 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-03-11 00:02:05,009 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-03-11 00:02:05,239 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-03-11 00:02:05,675 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-03-11 00:02:05,891 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-11 00:02:06,032 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-11 00:02:06,462 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-03-11 00:02:07,157 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2021-03-11 00:02:07,298 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-03-11 00:02:07,596 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-03-11 00:02:07,911 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2021-03-11 00:02:08,118 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-03-11 00:02:08,797 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-11 00:02:08,968 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-11 00:02:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:09,301 INFO L93 Difference]: Finished difference Result 2538 states and 7861 transitions. [2021-03-11 00:02:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:02:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:09,305 INFO L225 Difference]: With dead ends: 2538 [2021-03-11 00:02:09,305 INFO L226 Difference]: Without dead ends: 2493 [2021-03-11 00:02:09,306 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 5156.3ms TimeCoverageRelationStatistics Valid=698, Invalid=3592, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:02:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-03-11 00:02:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1453. [2021-03-11 00:02:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.331267217630854) internal successors, (4837), 1452 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4837 transitions. [2021-03-11 00:02:09,326 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4837 transitions. Word has length 26 [2021-03-11 00:02:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:09,326 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4837 transitions. [2021-03-11 00:02:09,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4837 transitions. [2021-03-11 00:02:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:09,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:09,328 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:09,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-03-11 00:02:09,531 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:09,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-03-11 00:02:09,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:09,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995369970] [2021-03-11 00:02:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:10,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995369970] [2021-03-11 00:02:10,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168949299] [2021-03-11 00:02:10,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:10,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:02:10,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:02:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:10,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:02:10,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:02:10,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:02:10,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:02:10,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:02:10,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:02:10,825 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:02:10,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:02:10,850 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:02:10,863 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:02:10,876 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:02:10,889 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:02:10,900 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:02:10,913 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:02:10,923 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:10,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:10,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:02:10,929 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,968 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-11 00:02:10,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:02:10,970 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:02:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:11,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:11,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:02:11,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914230535] [2021-03-11 00:02:11,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:11,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:11,004 INFO L87 Difference]: Start difference. First operand 1453 states and 4837 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:11,486 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-03-11 00:02:11,889 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-03-11 00:02:12,109 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-03-11 00:02:12,444 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-11 00:02:12,669 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-11 00:02:12,796 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-11 00:02:13,025 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-03-11 00:02:13,500 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-03-11 00:02:14,637 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-11 00:02:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:14,848 INFO L93 Difference]: Finished difference Result 2460 states and 7663 transitions. [2021-03-11 00:02:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:02:14,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:14,852 INFO L225 Difference]: With dead ends: 2460 [2021-03-11 00:02:14,852 INFO L226 Difference]: Without dead ends: 2415 [2021-03-11 00:02:14,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 3796.3ms TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:02:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-03-11 00:02:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1453. [2021-03-11 00:02:14,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.331955922865014) internal successors, (4838), 1452 states have internal predecessors, (4838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4838 transitions. [2021-03-11 00:02:14,872 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4838 transitions. Word has length 26 [2021-03-11 00:02:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:14,873 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4838 transitions. [2021-03-11 00:02:14,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4838 transitions. [2021-03-11 00:02:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:14,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:14,875 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:15,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-03-11 00:02:15,075 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:15,076 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-03-11 00:02:15,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:15,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325258043] [2021-03-11 00:02:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:15,455 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-03-11 00:02:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:15,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325258043] [2021-03-11 00:02:15,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379733063] [2021-03-11 00:02:15,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:15,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:02:15,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:02:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,284 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:02:16,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:02:16,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:16,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:02:16,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,362 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:02:16,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:02:16,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,396 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:02:16,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-03-11 00:02:16,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,433 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:02:16,434 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,466 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:02:16,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,495 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:02:16,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-03-11 00:02:16,498 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,516 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:02:16,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,549 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:02:16,550 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,568 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:02:16,569 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,586 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:02:16,587 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,613 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:02:16,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-03-11 00:02:16,615 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,632 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:02:16,633 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,650 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:02:16,650 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,667 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:02:16,668 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:16,677 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:02:16,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:02:16,678 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:16,851 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:02:16,851 INFO L628 ElimStorePlain]: treesize reduction 39, result has 73.5 percent of original size [2021-03-11 00:02:16,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:02:16,853 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-03-11 00:02:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:16,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:16,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:02:16,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077079252] [2021-03-11 00:02:16,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:02:16,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:16,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:02:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:02:16,965 INFO L87 Difference]: Start difference. First operand 1453 states and 4838 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:17,383 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-03-11 00:02:17,566 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-03-11 00:02:17,705 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-03-11 00:02:18,263 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-03-11 00:02:18,507 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-11 00:02:19,060 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-03-11 00:02:19,331 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-03-11 00:02:19,467 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-11 00:02:19,800 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-03-11 00:02:20,281 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2021-03-11 00:02:20,603 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2021-03-11 00:02:21,186 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-03-11 00:02:21,472 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-03-11 00:02:21,662 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-03-11 00:02:22,019 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-03-11 00:02:22,275 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2021-03-11 00:02:22,738 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-11 00:02:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:23,044 INFO L93 Difference]: Finished difference Result 3397 states and 10519 transitions. [2021-03-11 00:02:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:02:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:23,050 INFO L225 Difference]: With dead ends: 3397 [2021-03-11 00:02:23,050 INFO L226 Difference]: Without dead ends: 3337 [2021-03-11 00:02:23,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 5858.8ms TimeCoverageRelationStatistics Valid=834, Invalid=3456, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:02:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-03-11 00:02:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 1474. [2021-03-11 00:02:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.351663272233537) internal successors, (4937), 1473 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4937 transitions. [2021-03-11 00:02:23,076 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4937 transitions. Word has length 26 [2021-03-11 00:02:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:23,076 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4937 transitions. [2021-03-11 00:02:23,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4937 transitions. [2021-03-11 00:02:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:23,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:23,079 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:23,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable768 [2021-03-11 00:02:23,279 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:23,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-03-11 00:02:23,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:23,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746662712] [2021-03-11 00:02:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:23,503 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-11 00:02:23,635 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-11 00:02:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:23,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746662712] [2021-03-11 00:02:23,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765301645] [2021-03-11 00:02:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:23,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:02:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:02:24,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:24,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:24,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:02:24,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:24,387 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:24,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:24,401 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:24,408 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:24,415 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:02:24,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:02:24,428 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:24,434 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:24,441 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:24,447 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:24,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:02:24,456 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:24,542 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:02:24,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:02:24,544 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:02:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:24,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:24,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:02:24,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573681694] [2021-03-11 00:02:24,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:02:24,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:02:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:02:24,604 INFO L87 Difference]: Start difference. First operand 1474 states and 4937 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:25,553 INFO L93 Difference]: Finished difference Result 1857 states and 6096 transitions. [2021-03-11 00:02:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:02:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:25,556 INFO L225 Difference]: With dead ends: 1857 [2021-03-11 00:02:25,556 INFO L226 Difference]: Without dead ends: 1842 [2021-03-11 00:02:25,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1406.0ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:02:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-03-11 00:02:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1474. [2021-03-11 00:02:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.351663272233537) internal successors, (4937), 1473 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4937 transitions. [2021-03-11 00:02:25,574 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4937 transitions. Word has length 26 [2021-03-11 00:02:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:25,574 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4937 transitions. [2021-03-11 00:02:25,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4937 transitions. [2021-03-11 00:02:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:25,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:25,577 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:25,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:25,777 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:25,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 14 times [2021-03-11 00:02:25,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:25,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825404845] [2021-03-11 00:02:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:26,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825404845] [2021-03-11 00:02:26,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237005322] [2021-03-11 00:02:26,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:02:26,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:02:26,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:02:26,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:26,991 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:02:26,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-03-11 00:02:26,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,026 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-03-11 00:02:27,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:02:27,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,253 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:02:27,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:27,285 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:02:27,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-03-11 00:02:27,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:27,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-03-11 00:02:27,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,490 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:02:27,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:27,521 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:02:27,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-03-11 00:02:27,523 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,551 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:02:27,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-03-11 00:02:27,555 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,726 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:02:27,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:27,759 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:02:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-03-11 00:02:27,766 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:27,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:02:27,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,120 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-03-11 00:02:28,120 INFO L628 ElimStorePlain]: treesize reduction 17, result has 94.5 percent of original size [2021-03-11 00:02:28,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:28,168 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:820 [2021-03-11 00:02:28,667 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-03-11 00:02:28,989 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-11 00:02:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:29,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:29,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:02:29,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358660067] [2021-03-11 00:02:29,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:02:29,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:29,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:02:29,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:02:29,128 INFO L87 Difference]: Start difference. First operand 1474 states and 4937 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:29,318 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 22 [2021-03-11 00:02:29,474 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 28 [2021-03-11 00:02:29,933 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2021-03-11 00:02:30,535 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 41 [2021-03-11 00:02:30,813 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-03-11 00:02:31,063 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:02:31,574 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2021-03-11 00:02:32,002 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 62 [2021-03-11 00:02:32,465 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 69 [2021-03-11 00:02:32,872 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 49 [2021-03-11 00:02:33,204 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-03-11 00:02:33,705 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-03-11 00:02:34,152 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-03-11 00:02:34,745 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2021-03-11 00:02:35,496 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-03-11 00:02:35,858 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-03-11 00:02:36,458 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2021-03-11 00:02:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:36,551 INFO L93 Difference]: Finished difference Result 2117 states and 6795 transitions. [2021-03-11 00:02:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:02:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:36,555 INFO L225 Difference]: With dead ends: 2117 [2021-03-11 00:02:36,555 INFO L226 Difference]: Without dead ends: 2102 [2021-03-11 00:02:36,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 8039.8ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:02:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-03-11 00:02:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1478. [2021-03-11 00:02:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.3568043331076507) internal successors, (4958), 1477 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4958 transitions. [2021-03-11 00:02:36,581 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4958 transitions. Word has length 26 [2021-03-11 00:02:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:36,581 INFO L480 AbstractCegarLoop]: Abstraction has 1478 states and 4958 transitions. [2021-03-11 00:02:36,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4958 transitions. [2021-03-11 00:02:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:36,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:36,584 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:36,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:36,799 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:36,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:36,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 15 times [2021-03-11 00:02:36,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:36,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256540543] [2021-03-11 00:02:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:37,206 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-11 00:02:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:37,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256540543] [2021-03-11 00:02:37,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040076304] [2021-03-11 00:02:37,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:37,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:02:37,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:37,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:02:37,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:37,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,768 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:37,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:37,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:37,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:02:37,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,800 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:37,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:37,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,811 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:37,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:02:37,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,822 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:37,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:37,823 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:37,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:02:37,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,847 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:37,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:37,848 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,858 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:37,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:37,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,872 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:37,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:02:37,874 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,883 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:37,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:02:37,884 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:02:37,898 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,915 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:37,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:37,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:37,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:02:37,934 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,944 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:37,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:37,945 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:37,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:02:37,960 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:37,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:37,966 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:37,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:37,967 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:38,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:38,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:38,071 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-03-11 00:02:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:38,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:38,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:02:38,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100490561] [2021-03-11 00:02:38,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:38,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:38,302 INFO L87 Difference]: Start difference. First operand 1478 states and 4958 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:39,093 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-03-11 00:02:39,286 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-03-11 00:02:39,440 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-11 00:02:39,631 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-03-11 00:02:39,875 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:02:40,426 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-11 00:02:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:40,489 INFO L93 Difference]: Finished difference Result 2018 states and 6612 transitions. [2021-03-11 00:02:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:02:40,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:40,492 INFO L225 Difference]: With dead ends: 2018 [2021-03-11 00:02:40,492 INFO L226 Difference]: Without dead ends: 2003 [2021-03-11 00:02:40,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2586.8ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:02:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-03-11 00:02:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1475. [2021-03-11 00:02:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.3534599728629577) internal successors, (4943), 1474 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4943 transitions. [2021-03-11 00:02:40,513 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4943 transitions. Word has length 26 [2021-03-11 00:02:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:40,513 INFO L480 AbstractCegarLoop]: Abstraction has 1475 states and 4943 transitions. [2021-03-11 00:02:40,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4943 transitions. [2021-03-11 00:02:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:40,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:40,516 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:40,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:40,731 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:40,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:40,731 INFO L82 PathProgramCache]: Analyzing trace with hash 9265186, now seen corresponding path program 16 times [2021-03-11 00:02:40,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:40,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243174964] [2021-03-11 00:02:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243174964] [2021-03-11 00:02:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221455132] [2021-03-11 00:02:41,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:41,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:02:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:02:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:41,639 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:02:41,874 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-03-11 00:02:41,948 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_46, v_prenex_45]} [2021-03-11 00:02:41,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:41,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:02:41,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:42,083 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:02:42,084 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:02:42,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:42,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:42,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:42,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:42,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:42,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:42,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:42,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:42,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:42,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:42,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:42,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:02:42,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:42,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:42,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:02:42,204 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:02:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:42,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:42,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:02:42,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143260372] [2021-03-11 00:02:42,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:02:42,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:42,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:02:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:02:42,277 INFO L87 Difference]: Start difference. First operand 1475 states and 4943 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:42,614 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-11 00:02:43,015 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-03-11 00:02:43,339 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:02:43,591 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:02:44,053 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-03-11 00:02:44,448 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-03-11 00:02:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:44,628 INFO L93 Difference]: Finished difference Result 2004 states and 6582 transitions. [2021-03-11 00:02:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:02:44,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:44,632 INFO L225 Difference]: With dead ends: 2004 [2021-03-11 00:02:44,632 INFO L226 Difference]: Without dead ends: 1989 [2021-03-11 00:02:44,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2772.4ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:02:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-03-11 00:02:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1478. [2021-03-11 00:02:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.3547731888964116) internal successors, (4955), 1477 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4955 transitions. [2021-03-11 00:02:44,655 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4955 transitions. Word has length 26 [2021-03-11 00:02:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:44,655 INFO L480 AbstractCegarLoop]: Abstraction has 1478 states and 4955 transitions. [2021-03-11 00:02:44,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4955 transitions. [2021-03-11 00:02:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:44,657 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:44,657 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:44,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:44,858 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:44,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1608267594, now seen corresponding path program 17 times [2021-03-11 00:02:44,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:44,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556945290] [2021-03-11 00:02:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:45,303 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-11 00:02:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556945290] [2021-03-11 00:02:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026665536] [2021-03-11 00:02:45,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:45,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:02:45,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:45,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:02:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:45,877 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:02:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:45,961 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:45,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:02:45,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:46,110 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:02:46,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:46,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:02:46,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:46,257 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:02:46,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:46,296 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:46,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:46,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:46,424 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:02:46,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:46,439 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:46,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:46,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:46,565 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-11 00:02:46,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:46,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:02:46,582 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:46,701 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-11 00:02:46,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:46,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:02:46,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:46,833 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:02:46,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:46,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:02:46,848 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:46,959 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:02:46,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:46,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:02:46,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:47,083 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:02:47,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:47,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:47,089 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-03-11 00:02:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:47,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:47,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:02:47,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556318318] [2021-03-11 00:02:47,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:02:47,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:02:47,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:02:47,315 INFO L87 Difference]: Start difference. First operand 1478 states and 4955 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:47,547 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2021-03-11 00:02:47,803 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2021-03-11 00:02:47,942 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-03-11 00:02:48,333 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-03-11 00:02:48,599 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-03-11 00:02:48,862 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2021-03-11 00:02:49,112 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-03-11 00:02:49,303 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:02:49,738 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-11 00:02:50,417 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-03-11 00:02:50,758 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-11 00:02:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:50,896 INFO L93 Difference]: Finished difference Result 2074 states and 6746 transitions. [2021-03-11 00:02:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:02:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:50,899 INFO L225 Difference]: With dead ends: 2074 [2021-03-11 00:02:50,899 INFO L226 Difference]: Without dead ends: 2044 [2021-03-11 00:02:50,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 4003.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:02:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-03-11 00:02:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1472. [2021-03-11 00:02:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.352141400407886) internal successors, (4931), 1471 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4931 transitions. [2021-03-11 00:02:50,927 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4931 transitions. Word has length 26 [2021-03-11 00:02:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:50,927 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 4931 transitions. [2021-03-11 00:02:50,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4931 transitions. [2021-03-11 00:02:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:50,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:50,929 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:51,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-03-11 00:02:51,130 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:51,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 18 times [2021-03-11 00:02:51,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:51,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848493050] [2021-03-11 00:02:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:51,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848493050] [2021-03-11 00:02:51,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113000635] [2021-03-11 00:02:51,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:02:51,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:02:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:02:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:52,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:02:52,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:02:52,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:52,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:02:52,172 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:52,180 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:52,189 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:02:52,197 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:52,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:52,214 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:02:52,224 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:52,233 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:52,241 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:52,249 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:52,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:52,254 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,345 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:02:52,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:02:52,347 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:02:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:52,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:52,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:02:52,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697905558] [2021-03-11 00:02:52,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:52,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:52,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:52,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:52,413 INFO L87 Difference]: Start difference. First operand 1472 states and 4931 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:53,620 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-11 00:02:53,793 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-11 00:02:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:54,114 INFO L93 Difference]: Finished difference Result 1963 states and 6392 transitions. [2021-03-11 00:02:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:02:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:54,117 INFO L225 Difference]: With dead ends: 1963 [2021-03-11 00:02:54,117 INFO L226 Difference]: Without dead ends: 1938 [2021-03-11 00:02:54,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1966.2ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:02:54,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-03-11 00:02:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1507. [2021-03-11 00:02:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.347941567065073) internal successors, (5042), 1506 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5042 transitions. [2021-03-11 00:02:54,141 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5042 transitions. Word has length 26 [2021-03-11 00:02:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:54,141 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 5042 transitions. [2021-03-11 00:02:54,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5042 transitions. [2021-03-11 00:02:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:54,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:54,144 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:54,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:54,359 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 19 times [2021-03-11 00:02:54,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:54,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326159206] [2021-03-11 00:02:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:54,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326159206] [2021-03-11 00:02:54,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334527666] [2021-03-11 00:02:54,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:54,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:02:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:55,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,200 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:55,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:55,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:02:55,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,228 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:55,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:02:55,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,243 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:55,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:02:55,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,258 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:55,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:55,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,274 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:55,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:55,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:02:55,293 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,306 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:55,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:55,307 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,318 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:55,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:55,319 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,329 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:55,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:02:55,330 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,357 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:55,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:02:55,358 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,372 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:55,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:55,373 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:02:55,392 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:02:55,409 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,419 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:02:55,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:02:55,420 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:02:55,431 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,531 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:02:55,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:55,536 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-03-11 00:02:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:55,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:55,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:02:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424602436] [2021-03-11 00:02:55,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:02:55,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:55,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:02:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:02:55,760 INFO L87 Difference]: Start difference. First operand 1507 states and 5042 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:55,953 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-03-11 00:02:56,941 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-11 00:02:57,378 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-03-11 00:02:57,498 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-11 00:02:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:57,576 INFO L93 Difference]: Finished difference Result 2180 states and 7083 transitions. [2021-03-11 00:02:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:02:57,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:02:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:57,579 INFO L225 Difference]: With dead ends: 2180 [2021-03-11 00:02:57,579 INFO L226 Difference]: Without dead ends: 2155 [2021-03-11 00:02:57,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2017.2ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:02:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-03-11 00:02:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1510. [2021-03-11 00:02:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.34857521537442) internal successors, (5053), 1509 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5053 transitions. [2021-03-11 00:02:57,599 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5053 transitions. Word has length 26 [2021-03-11 00:02:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:57,599 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 5053 transitions. [2021-03-11 00:02:57,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:02:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5053 transitions. [2021-03-11 00:02:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:57,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:57,601 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:02:57,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-03-11 00:02:57,803 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:57,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 20 times [2021-03-11 00:02:57,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:57,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051997843] [2021-03-11 00:02:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:58,026 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-11 00:02:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:58,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051997843] [2021-03-11 00:02:58,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875508346] [2021-03-11 00:02:58,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:58,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:02:58,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:02:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:58,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:58,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:58,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:02:58,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:58,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:58,768 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:58,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:58,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:58,922 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:02:58,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:58,942 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:58,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:02:58,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:58,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:58,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:02:58,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:59,098 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:02:59,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:59,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:59,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:02:59,117 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:59,129 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:02:59,131 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:59,270 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:02:59,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:59,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:59,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:02:59,286 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:59,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:59,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:02:59,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:59,415 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:02:59,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:59,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:59,421 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:174 [2021-03-11 00:02:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:59,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:59,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:02:59,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100945135] [2021-03-11 00:02:59,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:59,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:59,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:59,648 INFO L87 Difference]: Start difference. First operand 1510 states and 5053 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:00,478 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-11 00:03:00,772 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-11 00:03:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:00,836 INFO L93 Difference]: Finished difference Result 1689 states and 5564 transitions. [2021-03-11 00:03:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:03:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:00,839 INFO L225 Difference]: With dead ends: 1689 [2021-03-11 00:03:00,840 INFO L226 Difference]: Without dead ends: 1664 [2021-03-11 00:03:00,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1722.2ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:03:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-03-11 00:03:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1523. [2021-03-11 00:03:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.354796320630749) internal successors, (5106), 1522 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5106 transitions. [2021-03-11 00:03:00,858 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5106 transitions. Word has length 26 [2021-03-11 00:03:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:00,859 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5106 transitions. [2021-03-11 00:03:00,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5106 transitions. [2021-03-11 00:03:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:00,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:00,862 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:01,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:01,062 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 21 times [2021-03-11 00:03:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:01,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846583306] [2021-03-11 00:03:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:01,275 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:03:01,393 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-11 00:03:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:01,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846583306] [2021-03-11 00:03:01,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489029473] [2021-03-11 00:03:01,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:03:01,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:03:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:01,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:03:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:01,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,931 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:01,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,942 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:01,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,952 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:01,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:03:01,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,967 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:01,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:03:01,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,983 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:01,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:03:01,985 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:01,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:01,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:03:01,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,009 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:02,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:03:02,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:02,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:03:02,025 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:03:02,042 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,052 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:03:02,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,063 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:02,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:03:02,064 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:02,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:03:02,079 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,093 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:02,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:03:02,094 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:02,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:03:02,111 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,121 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:02,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:03:02,122 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:02,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:02,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:03:02,129 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:02,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:02,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:03:02,220 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:03:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:02,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:02,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:03:02,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899122248] [2021-03-11 00:03:02,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:02,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:02,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:02,464 INFO L87 Difference]: Start difference. First operand 1523 states and 5106 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:03,172 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-03-11 00:03:03,342 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-03-11 00:03:03,807 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:03:04,009 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-11 00:03:04,285 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:03:04,578 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-11 00:03:04,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:04,679 INFO L93 Difference]: Finished difference Result 2055 states and 6753 transitions. [2021-03-11 00:03:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:03:04,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:04,683 INFO L225 Difference]: With dead ends: 2055 [2021-03-11 00:03:04,683 INFO L226 Difference]: Without dead ends: 2036 [2021-03-11 00:03:04,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2547.2ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:03:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-03-11 00:03:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1535. [2021-03-11 00:03:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3578878748370276) internal successors, (5151), 1534 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5151 transitions. [2021-03-11 00:03:04,705 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5151 transitions. Word has length 26 [2021-03-11 00:03:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:04,705 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 5151 transitions. [2021-03-11 00:03:04,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5151 transitions. [2021-03-11 00:03:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:04,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:04,707 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:04,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:04,908 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 22 times [2021-03-11 00:03:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:04,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870381480] [2021-03-11 00:03:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:05,270 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-11 00:03:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:05,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870381480] [2021-03-11 00:03:05,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938868436] [2021-03-11 00:03:05,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:05,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:03:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:05,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:03:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:05,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:05,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:05,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:03:05,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:05,855 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:05,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:03:05,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,013 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:03:06,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:03:06,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,046 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:06,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:03:06,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,194 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:03:06,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:03:06,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:03:06,232 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,372 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:03:06,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,388 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:06,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:03:06,390 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:06,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:03:06,405 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:06,527 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:03:06,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:06,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:03:06,533 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-03-11 00:03:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:06,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:06,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:03:06,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548505905] [2021-03-11 00:03:06,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:03:06,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:03:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:03:06,764 INFO L87 Difference]: Start difference. First operand 1535 states and 5151 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:06,925 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-03-11 00:03:07,316 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-11 00:03:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:08,061 INFO L93 Difference]: Finished difference Result 2036 states and 6692 transitions. [2021-03-11 00:03:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:03:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:08,064 INFO L225 Difference]: With dead ends: 2036 [2021-03-11 00:03:08,064 INFO L226 Difference]: Without dead ends: 2011 [2021-03-11 00:03:08,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1693.7ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:03:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-03-11 00:03:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1541. [2021-03-11 00:03:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.3564935064935066) internal successors, (5169), 1540 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5169 transitions. [2021-03-11 00:03:08,083 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5169 transitions. Word has length 26 [2021-03-11 00:03:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:08,083 INFO L480 AbstractCegarLoop]: Abstraction has 1541 states and 5169 transitions. [2021-03-11 00:03:08,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:08,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5169 transitions. [2021-03-11 00:03:08,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:08,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:08,085 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:08,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1157,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:08,286 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-03-11 00:03:08,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:08,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451633542] [2021-03-11 00:03:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:08,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451633542] [2021-03-11 00:03:08,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680243350] [2021-03-11 00:03:08,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:08,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:03:08,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:08,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:03:08,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:09,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:03:09,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:03:09,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:03:09,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:03:09,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:03:09,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:03:09,508 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:03:09,517 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:03:09,527 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:03:09,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:03:09,546 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:03:09,555 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:03:09,565 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:03:09,574 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:03:09,583 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:03:09,588 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,621 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-03-11 00:03:09,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:03:09,623 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:03:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:09,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:09,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:03:09,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727609504] [2021-03-11 00:03:09,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:09,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:09,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:09,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:09,660 INFO L87 Difference]: Start difference. First operand 1541 states and 5169 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:10,960 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-11 00:03:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:11,042 INFO L93 Difference]: Finished difference Result 1988 states and 6491 transitions. [2021-03-11 00:03:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:03:11,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:11,045 INFO L225 Difference]: With dead ends: 1988 [2021-03-11 00:03:11,045 INFO L226 Difference]: Without dead ends: 1962 [2021-03-11 00:03:11,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1752.3ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:03:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-03-11 00:03:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1545. [2021-03-11 00:03:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3542746113989637) internal successors, (5179), 1544 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5179 transitions. [2021-03-11 00:03:11,065 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5179 transitions. Word has length 26 [2021-03-11 00:03:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:11,065 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5179 transitions. [2021-03-11 00:03:11,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5179 transitions. [2021-03-11 00:03:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:11,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:11,067 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:11,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-03-11 00:03:11,271 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:11,271 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-03-11 00:03:11,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:11,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895437110] [2021-03-11 00:03:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:11,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895437110] [2021-03-11 00:03:11,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401920754] [2021-03-11 00:03:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:11,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:03:11,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:12,181 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:03:12,252 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_75, v_prenex_77], 6=[A, v_prenex_73]} [2021-03-11 00:03:12,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:12,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:12,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:12,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-11 00:03:12,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:12,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:12,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-03-11 00:03:12,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:12,435 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-11 00:03:12,436 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.7 percent of original size [2021-03-11 00:03:12,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-11 00:03:12,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:12,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:12,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:12,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:12,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:03:12,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:12,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:12,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:12,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:12,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:03:12,557 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:12,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:12,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:03:12,605 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:381, output treesize:55 [2021-03-11 00:03:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:12,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:12,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:03:12,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89854954] [2021-03-11 00:03:12,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:12,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:12,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:12,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:12,689 INFO L87 Difference]: Start difference. First operand 1545 states and 5179 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:14,890 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:03:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:15,102 INFO L93 Difference]: Finished difference Result 2157 states and 7044 transitions. [2021-03-11 00:03:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:03:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:15,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:15,106 INFO L225 Difference]: With dead ends: 2157 [2021-03-11 00:03:15,106 INFO L226 Difference]: Without dead ends: 2142 [2021-03-11 00:03:15,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2591.6ms TimeCoverageRelationStatistics Valid=362, Invalid=1530, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:03:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-03-11 00:03:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1545. [2021-03-11 00:03:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3542746113989637) internal successors, (5179), 1544 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5179 transitions. [2021-03-11 00:03:15,128 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5179 transitions. Word has length 26 [2021-03-11 00:03:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:15,128 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5179 transitions. [2021-03-11 00:03:15,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5179 transitions. [2021-03-11 00:03:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:15,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:15,130 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:15,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-03-11 00:03:15,331 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:15,331 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 23 times [2021-03-11 00:03:15,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:15,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955239541] [2021-03-11 00:03:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:15,588 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-11 00:03:15,704 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:03:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:16,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955239541] [2021-03-11 00:03:16,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884908564] [2021-03-11 00:03:16,029 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 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 [2021-03-11 00:03:16,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:03:16,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:16,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:03:16,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:16,518 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:03:16,775 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-11 00:03:17,081 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-03-11 00:03:17,128 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_87, v_prenex_88], 2=[A, v_prenex_86]} [2021-03-11 00:03:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:03:17,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,307 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-11 00:03:17,308 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.1 percent of original size [2021-03-11 00:03:17,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:03:17,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:17,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:03:17,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:17,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:17,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:17,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:17,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:17,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:17,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:03:17,507 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:211, output treesize:51 [2021-03-11 00:03:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:17,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:17,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:03:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748744892] [2021-03-11 00:03:17,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:03:17,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:17,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:03:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:03:17,583 INFO L87 Difference]: Start difference. First operand 1545 states and 5179 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:18,257 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:03:18,429 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-11 00:03:18,709 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-11 00:03:19,374 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2021-03-11 00:03:19,993 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-03-11 00:03:20,583 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 76 [2021-03-11 00:03:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:20,745 INFO L93 Difference]: Finished difference Result 2023 states and 6590 transitions. [2021-03-11 00:03:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:03:20,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:20,749 INFO L225 Difference]: With dead ends: 2023 [2021-03-11 00:03:20,749 INFO L226 Difference]: Without dead ends: 2008 [2021-03-11 00:03:20,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 4040.4ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:03:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-03-11 00:03:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1556. [2021-03-11 00:03:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.354983922829582) internal successors, (5217), 1555 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5217 transitions. [2021-03-11 00:03:20,767 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5217 transitions. Word has length 26 [2021-03-11 00:03:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:20,767 INFO L480 AbstractCegarLoop]: Abstraction has 1556 states and 5217 transitions. [2021-03-11 00:03:20,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5217 transitions. [2021-03-11 00:03:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:20,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:20,769 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:20,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:20,970 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:20,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-03-11 00:03:20,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:20,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254848366] [2021-03-11 00:03:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:21,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254848366] [2021-03-11 00:03:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724524088] [2021-03-11 00:03:21,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:03:21,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:03:21,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:03:21,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:22,126 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:03:22,652 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 87 [2021-03-11 00:03:23,156 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_125], 6=[v_prenex_124, v_prenex_126]} [2021-03-11 00:03:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,199 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:23,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:03:23,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,239 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:23,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:03:23,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,570 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-11 00:03:23,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:23,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:23,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:03:23,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,631 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:03:23,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:03:23,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,898 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-11 00:03:23,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:23,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:23,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:23,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:23,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:03:23,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:23,964 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:03:23,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:03:23,965 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:24,192 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:03:24,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:24,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:24,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:24,230 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:24,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:03:24,232 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:24,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:24,260 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:03:24,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:03:24,263 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:24,469 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:03:24,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:24,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:03:24,510 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 13 variables, input treesize:433, output treesize:357 [2021-03-11 00:03:24,781 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-11 00:03:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:24,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:24,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:03:24,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468651021] [2021-03-11 00:03:24,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:03:24,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:03:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:03:24,832 INFO L87 Difference]: Start difference. First operand 1556 states and 5217 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:25,354 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-03-11 00:03:25,819 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-03-11 00:03:26,109 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-03-11 00:03:26,429 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-03-11 00:03:26,759 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-11 00:03:27,107 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-03-11 00:03:27,340 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-11 00:03:27,954 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-03-11 00:03:28,098 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-03-11 00:03:28,270 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-03-11 00:03:28,989 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 70 [2021-03-11 00:03:29,515 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-03-11 00:03:29,710 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2021-03-11 00:03:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:30,240 INFO L93 Difference]: Finished difference Result 2283 states and 7340 transitions. [2021-03-11 00:03:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:03:30,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:30,246 INFO L225 Difference]: With dead ends: 2283 [2021-03-11 00:03:30,246 INFO L226 Difference]: Without dead ends: 2261 [2021-03-11 00:03:30,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 6141.4ms TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:03:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-03-11 00:03:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1570. [2021-03-11 00:03:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3626513702995537) internal successors, (5276), 1569 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5276 transitions. [2021-03-11 00:03:30,275 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5276 transitions. Word has length 26 [2021-03-11 00:03:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:30,275 INFO L480 AbstractCegarLoop]: Abstraction has 1570 states and 5276 transitions. [2021-03-11 00:03:30,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5276 transitions. [2021-03-11 00:03:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:30,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:30,278 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:30,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:30,491 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-03-11 00:03:30,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:30,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880403450] [2021-03-11 00:03:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:31,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880403450] [2021-03-11 00:03:31,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884468370] [2021-03-11 00:03:31,017 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 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 [2021-03-11 00:03:31,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:03:31,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:31,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:03:31,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:31,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,827 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:03:31,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-03-11 00:03:31,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:31,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,865 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:03:31,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-03-11 00:03:31,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:31,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2021-03-11 00:03:31,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:31,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,937 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:31,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:03:31,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:31,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,974 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-03-11 00:03:31,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 22 [2021-03-11 00:03:31,976 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:31,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:31,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:32,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-03-11 00:03:32,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,063 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:03:32,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 33 [2021-03-11 00:03:32,068 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,105 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:03:32,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2021-03-11 00:03:32,107 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,144 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:03:32,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-03-11 00:03:32,146 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,186 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:03:32,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-03-11 00:03:32,192 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,228 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:03:32,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-03-11 00:03:32,230 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,254 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:32,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:03:32,255 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,278 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:32,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:03:32,279 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,305 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:32,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:03:32,306 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,331 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:03:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-03-11 00:03:32,332 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:32,358 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:03:32,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-03-11 00:03:32,370 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:32,646 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-11 00:03:32,647 INFO L628 ElimStorePlain]: treesize reduction 263, result has 37.7 percent of original size [2021-03-11 00:03:32,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:03:32,649 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-03-11 00:03:32,803 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-11 00:03:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:32,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:32,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:03:32,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603206192] [2021-03-11 00:03:32,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:03:32,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:03:32,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:03:32,852 INFO L87 Difference]: Start difference. First operand 1570 states and 5276 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:34,123 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-11 00:03:34,260 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-11 00:03:34,761 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-11 00:03:34,921 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-11 00:03:35,373 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-11 00:03:35,533 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-11 00:03:36,082 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-11 00:03:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:36,735 INFO L93 Difference]: Finished difference Result 2436 states and 7650 transitions. [2021-03-11 00:03:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:03:36,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:36,739 INFO L225 Difference]: With dead ends: 2436 [2021-03-11 00:03:36,739 INFO L226 Difference]: Without dead ends: 2406 [2021-03-11 00:03:36,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 3872.9ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:03:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-03-11 00:03:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 1617. [2021-03-11 00:03:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.359529702970297) internal successors, (5429), 1616 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:36,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5429 transitions. [2021-03-11 00:03:36,763 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5429 transitions. Word has length 26 [2021-03-11 00:03:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:36,763 INFO L480 AbstractCegarLoop]: Abstraction has 1617 states and 5429 transitions. [2021-03-11 00:03:36,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5429 transitions. [2021-03-11 00:03:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:36,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:36,765 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:36,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:36,965 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:36,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:36,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 24 times [2021-03-11 00:03:36,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:36,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867280677] [2021-03-11 00:03:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:37,188 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:03:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:37,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867280677] [2021-03-11 00:03:37,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876165326] [2021-03-11 00:03:37,519 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 [2021-03-11 00:03:37,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:03:37,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:37,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:03:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:37,861 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:03:38,167 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:03:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:38,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-03-11 00:03:38,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,744 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-03-11 00:03:38,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,776 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:03:38,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-03-11 00:03:38,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,966 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-11 00:03:38,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:38,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,998 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:03:38,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-03-11 00:03:39,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,186 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-11 00:03:39,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,214 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:03:39,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-03-11 00:03:39,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,394 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-11 00:03:39,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,421 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:03:39,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-03-11 00:03:39,423 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,601 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 00:03:39,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-03-11 00:03:39,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,808 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-11 00:03:39,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-03-11 00:03:39,834 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:40,008 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:03:40,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:40,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:40,037 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:03:40,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-03-11 00:03:40,039 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:40,214 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-11 00:03:40,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:40,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:03:40,229 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:504 [2021-03-11 00:03:40,626 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-03-11 00:03:40,796 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:03:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:40,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:40,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:03:40,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975359830] [2021-03-11 00:03:40,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:03:40,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:40,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:03:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:03:40,950 INFO L87 Difference]: Start difference. First operand 1617 states and 5429 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:41,554 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-03-11 00:03:41,966 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 54 [2021-03-11 00:03:42,300 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-03-11 00:03:42,458 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-03-11 00:03:42,700 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-11 00:03:43,173 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 55 [2021-03-11 00:03:43,320 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-11 00:03:43,515 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-11 00:03:43,874 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-11 00:03:44,506 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-03-11 00:03:45,014 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2021-03-11 00:03:45,642 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-03-11 00:03:45,982 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:03:46,367 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-03-11 00:03:46,925 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-03-11 00:03:47,616 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-03-11 00:03:47,938 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-03-11 00:03:48,744 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 70 [2021-03-11 00:03:49,138 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 45 [2021-03-11 00:03:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:49,211 INFO L93 Difference]: Finished difference Result 2483 states and 7942 transitions. [2021-03-11 00:03:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:03:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:49,216 INFO L225 Difference]: With dead ends: 2483 [2021-03-11 00:03:49,216 INFO L226 Difference]: Without dead ends: 2449 [2021-03-11 00:03:49,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 9044.9ms TimeCoverageRelationStatistics Valid=396, Invalid=1956, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:03:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-03-11 00:03:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1632. [2021-03-11 00:03:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.3678724708767627) internal successors, (5493), 1631 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5493 transitions. [2021-03-11 00:03:49,239 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5493 transitions. Word has length 26 [2021-03-11 00:03:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:49,239 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5493 transitions. [2021-03-11 00:03:49,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5493 transitions. [2021-03-11 00:03:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:49,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:49,241 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:49,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:49,441 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:49,442 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 25 times [2021-03-11 00:03:49,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:49,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987628758] [2021-03-11 00:03:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:49,673 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-11 00:03:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:49,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987628758] [2021-03-11 00:03:49,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892484568] [2021-03-11 00:03:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:03:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:03:49,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:50,546 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:03:50,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:50,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:03:50,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,845 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 00:03:50,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:50,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:03:50,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:51,011 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-11 00:03:51,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:51,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:03:51,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:51,178 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-03-11 00:03:51,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:51,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:03:51,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:51,343 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:03:51,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:51,360 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:51,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:03:51,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:51,505 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-11 00:03:51,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:51,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:03:51,526 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:51,662 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:03:51,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:51,678 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:51,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:03:51,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:51,815 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-11 00:03:51,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:51,830 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:51,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:03:51,833 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:51,960 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:03:51,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:03:51,968 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-03-11 00:03:52,102 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:03:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:52,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:52,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:03:52,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769930722] [2021-03-11 00:03:52,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:03:52,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:03:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:03:52,241 INFO L87 Difference]: Start difference. First operand 1632 states and 5493 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:52,652 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:03:53,004 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-11 00:03:53,724 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:03:54,290 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-03-11 00:03:54,705 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:03:54,921 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-11 00:03:55,429 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-03-11 00:03:55,693 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-03-11 00:03:56,027 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-11 00:03:56,390 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-03-11 00:03:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:56,597 INFO L93 Difference]: Finished difference Result 2652 states and 8518 transitions. [2021-03-11 00:03:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:03:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:03:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:56,602 INFO L225 Difference]: With dead ends: 2652 [2021-03-11 00:03:56,602 INFO L226 Difference]: Without dead ends: 2618 [2021-03-11 00:03:56,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4376.8ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:03:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-03-11 00:03:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1646. [2021-03-11 00:03:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 3.374468085106383) internal successors, (5551), 1645 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5551 transitions. [2021-03-11 00:03:56,628 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5551 transitions. Word has length 26 [2021-03-11 00:03:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:56,628 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 5551 transitions. [2021-03-11 00:03:56,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5551 transitions. [2021-03-11 00:03:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:56,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:56,630 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:03:56,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1538 [2021-03-11 00:03:56,831 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:56,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-03-11 00:03:56,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:56,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617242701] [2021-03-11 00:03:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:57,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617242701] [2021-03-11 00:03:57,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333329221] [2021-03-11 00:03:57,491 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 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 [2021-03-11 00:03:57,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:03:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:03:57,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:57,876 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:03:58,130 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:03:58,392 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-03-11 00:03:58,526 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_182, v_prenex_178], 6=[A, v_prenex_180]} [2021-03-11 00:03:58,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:58,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:58,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:58,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:03:58,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:58,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:58,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:58,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:03:58,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:58,698 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-03-11 00:03:58,699 INFO L628 ElimStorePlain]: treesize reduction 152, result has 43.3 percent of original size [2021-03-11 00:03:58,699 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-03-11 00:03:58,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:58,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:58,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-11 00:03:58,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:58,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:58,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:58,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:58,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:58,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:03:58,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:58,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:58,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:03:58,809 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:329, output treesize:41 [2021-03-11 00:03:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:58,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:58,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:03:58,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798254216] [2021-03-11 00:03:58,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:58,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:58,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:58,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:58,844 INFO L87 Difference]: Start difference. First operand 1646 states and 5551 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:03:59,114 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-11 00:03:59,717 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-11 00:04:00,401 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2021-03-11 00:04:00,539 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-11 00:04:00,680 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-11 00:04:00,911 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:04:01,136 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-11 00:04:01,278 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-11 00:04:01,683 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-03-11 00:04:01,916 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:04:02,111 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-11 00:04:02,522 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2021-03-11 00:04:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:03,287 INFO L93 Difference]: Finished difference Result 2533 states and 8068 transitions. [2021-03-11 00:04:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:04:03,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:03,292 INFO L225 Difference]: With dead ends: 2533 [2021-03-11 00:04:03,292 INFO L226 Difference]: Without dead ends: 2503 [2021-03-11 00:04:03,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 5011.3ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:04:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-03-11 00:04:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1730. [2021-03-11 00:04:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.3846153846153846) internal successors, (5852), 1729 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5852 transitions. [2021-03-11 00:04:03,316 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5852 transitions. Word has length 26 [2021-03-11 00:04:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:03,316 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5852 transitions. [2021-03-11 00:04:03,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5852 transitions. [2021-03-11 00:04:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:03,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:03,318 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:03,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-03-11 00:04:03,518 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-03-11 00:04:03,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:03,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59062201] [2021-03-11 00:04:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:03,840 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-11 00:04:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:04,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59062201] [2021-03-11 00:04:04,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473544575] [2021-03-11 00:04:04,342 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 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 [2021-03-11 00:04:04,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:04:04,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:04,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:04:04,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:04,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:05,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:04:05,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:05,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-03-11 00:04:05,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,124 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:04:05,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-03-11 00:04:05,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,162 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:04:05,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-03-11 00:04:05,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,203 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:04:05,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-03-11 00:04:05,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,243 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:04:05,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-03-11 00:04:05,245 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,269 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:04:05,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-03-11 00:04:05,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,294 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:04:05,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:04:05,295 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,320 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:04:05,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:04:05,321 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,344 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:04:05,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:04:05,345 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,380 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:04:05,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-03-11 00:04:05,382 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,406 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:04:05,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:04:05,407 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,432 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:04:05,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:04:05,433 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,457 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:04:05,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:04:05,458 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,494 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:04:05,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-03-11 00:04:05,496 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:05,510 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:04:05,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:04:05,511 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:05,647 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-11 00:04:05,648 INFO L628 ElimStorePlain]: treesize reduction 108, result has 46.3 percent of original size [2021-03-11 00:04:05,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:04:05,651 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-03-11 00:04:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:05,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:05,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:04:05,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081433446] [2021-03-11 00:04:05,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:04:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:04:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:04:05,802 INFO L87 Difference]: Start difference. First operand 1730 states and 5852 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:06,676 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:04:07,196 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-03-11 00:04:07,407 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-11 00:04:08,035 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-03-11 00:04:08,301 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-11 00:04:08,851 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-11 00:04:09,299 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-03-11 00:04:09,436 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-11 00:04:09,734 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-03-11 00:04:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:10,057 INFO L93 Difference]: Finished difference Result 2949 states and 9251 transitions. [2021-03-11 00:04:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:04:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:10,063 INFO L225 Difference]: With dead ends: 2949 [2021-03-11 00:04:10,063 INFO L226 Difference]: Without dead ends: 2901 [2021-03-11 00:04:10,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 4465.6ms TimeCoverageRelationStatistics Valid=626, Invalid=2566, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:04:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-03-11 00:04:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 1752. [2021-03-11 00:04:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3872073101085096) internal successors, (5931), 1751 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5931 transitions. [2021-03-11 00:04:10,090 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5931 transitions. Word has length 26 [2021-03-11 00:04:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:10,090 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5931 transitions. [2021-03-11 00:04:10,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5931 transitions. [2021-03-11 00:04:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:10,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:10,092 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:10,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1572 [2021-03-11 00:04:10,293 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 26 times [2021-03-11 00:04:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:10,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590471257] [2021-03-11 00:04:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:10,544 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:04:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:10,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590471257] [2021-03-11 00:04:10,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191644246] [2021-03-11 00:04:10,844 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 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 [2021-03-11 00:04:10,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:04:10,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:10,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:04:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:11,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:04:11,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:04:11,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,287 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:04:11,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:04:11,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:04:11,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:04:11,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,319 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:04:11,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:04:11,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,339 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:04:11,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:04:11,342 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:11,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:04:11,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,372 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:04:11,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:04:11,374 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:11,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:04:11,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:11,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:04:11,415 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,428 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:04:11,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:04:11,429 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,442 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:04:11,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:04:11,443 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:11,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:04:11,464 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,481 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:04:11,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:04:11,483 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:11,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:04:11,505 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,518 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:04:11,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:04:11,519 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:11,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:04:11,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:04:11,528 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:11,637 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:04:11,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:11,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:04:11,639 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:04:11,779 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:04:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:11,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:11,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:04:11,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611939721] [2021-03-11 00:04:11,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:04:11,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:04:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:04:11,936 INFO L87 Difference]: Start difference. First operand 1752 states and 5931 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:12,178 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 21 [2021-03-11 00:04:12,536 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-03-11 00:04:12,688 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-03-11 00:04:13,043 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-11 00:04:13,333 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-11 00:04:13,601 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-03-11 00:04:13,949 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-11 00:04:14,305 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-11 00:04:14,494 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-03-11 00:04:14,625 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:04:14,905 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:04:15,229 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-11 00:04:15,664 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-03-11 00:04:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:15,751 INFO L93 Difference]: Finished difference Result 2355 states and 7783 transitions. [2021-03-11 00:04:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:04:15,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:15,756 INFO L225 Difference]: With dead ends: 2355 [2021-03-11 00:04:15,756 INFO L226 Difference]: Without dead ends: 2336 [2021-03-11 00:04:15,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 4060.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:04:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-03-11 00:04:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1738. [2021-03-11 00:04:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.379965457685665) internal successors, (5871), 1737 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5871 transitions. [2021-03-11 00:04:15,778 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5871 transitions. Word has length 26 [2021-03-11 00:04:15,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:15,779 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5871 transitions. [2021-03-11 00:04:15,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:15,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5871 transitions. [2021-03-11 00:04:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:15,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:15,781 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:15,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1672 [2021-03-11 00:04:15,981 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:15,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:15,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 27 times [2021-03-11 00:04:15,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:15,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791150717] [2021-03-11 00:04:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:16,212 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-11 00:04:16,457 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-11 00:04:16,651 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-11 00:04:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:16,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791150717] [2021-03-11 00:04:16,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2345358] [2021-03-11 00:04:16,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:16,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:04:16,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:16,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:04:16,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:17,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,168 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:04:17,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 27 [2021-03-11 00:04:17,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,202 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:04:17,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:04:17,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,230 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:04:17,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:04:17,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,264 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:04:17,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-03-11 00:04:17,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,285 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:04:17,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:04:17,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,305 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:04:17,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:04:17,306 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,347 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:04:17,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-03-11 00:04:17,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,370 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:04:17,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:04:17,371 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:17,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:04:17,408 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:17,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-03-11 00:04:17,439 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:17,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-03-11 00:04:17,474 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,494 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:04:17,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:04:17,495 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,513 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:04:17,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:04:17,514 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,532 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:04:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:04:17,534 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:17,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,566 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:04:17,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-03-11 00:04:17,569 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:17,595 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:04:17,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 30 [2021-03-11 00:04:17,602 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:17,794 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:04:17,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:17,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:04:17,797 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:905, output treesize:313 [2021-03-11 00:04:18,011 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:04:18,259 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:04:18,638 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-11 00:04:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:18,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:18,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-11 00:04:18,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816326500] [2021-03-11 00:04:18,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:04:18,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:04:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:04:18,796 INFO L87 Difference]: Start difference. First operand 1738 states and 5871 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:20,093 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-11 00:04:20,477 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-11 00:04:20,752 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-11 00:04:21,111 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-03-11 00:04:21,633 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-11 00:04:22,212 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-11 00:04:22,712 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-03-11 00:04:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:22,949 INFO L93 Difference]: Finished difference Result 2428 states and 7983 transitions. [2021-03-11 00:04:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:04:22,949 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:22,954 INFO L225 Difference]: With dead ends: 2428 [2021-03-11 00:04:22,954 INFO L226 Difference]: Without dead ends: 2378 [2021-03-11 00:04:22,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4775.7ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:04:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-03-11 00:04:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1738. [2021-03-11 00:04:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.379965457685665) internal successors, (5871), 1737 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5871 transitions. [2021-03-11 00:04:22,977 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5871 transitions. Word has length 26 [2021-03-11 00:04:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:22,977 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5871 transitions. [2021-03-11 00:04:22,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5871 transitions. [2021-03-11 00:04:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:22,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:22,980 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:23,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-03-11 00:04:23,180 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:23,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1946487342, now seen corresponding path program 48 times [2021-03-11 00:04:23,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:23,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001357084] [2021-03-11 00:04:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:23,446 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:04:23,573 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:04:23,691 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-03-11 00:04:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:23,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001357084] [2021-03-11 00:04:23,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201518249] [2021-03-11 00:04:23,893 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 [2021-03-11 00:04:23,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:04:23,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:04:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:24,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:04:24,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:04:24,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:04:24,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:04:24,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:04:24,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-03-11 00:04:24,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-03-11 00:04:24,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:04:24,816 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:04:24,834 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:04:24,848 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-03-11 00:04:24,862 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-03-11 00:04:24,875 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-03-11 00:04:24,887 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:04:24,901 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-03-11 00:04:24,919 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:24,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:24,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:04:24,929 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:24,992 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-03-11 00:04:24,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:04:24,994 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-03-11 00:04:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:25,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:25,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:04:25,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959725881] [2021-03-11 00:04:25,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:04:25,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:04:25,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:04:25,076 INFO L87 Difference]: Start difference. First operand 1738 states and 5871 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:25,754 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-03-11 00:04:26,131 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2021-03-11 00:04:26,306 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-03-11 00:04:26,687 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-11 00:04:26,822 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-03-11 00:04:27,326 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-11 00:04:27,462 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-03-11 00:04:27,998 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-11 00:04:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:28,123 INFO L93 Difference]: Finished difference Result 2197 states and 7216 transitions. [2021-03-11 00:04:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:04:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:28,128 INFO L225 Difference]: With dead ends: 2197 [2021-03-11 00:04:28,128 INFO L226 Difference]: Without dead ends: 2175 [2021-03-11 00:04:28,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 3343.4ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:04:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-03-11 00:04:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1734. [2021-03-11 00:04:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.378534333525678) internal successors, (5855), 1733 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5855 transitions. [2021-03-11 00:04:28,149 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5855 transitions. Word has length 26 [2021-03-11 00:04:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:28,149 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5855 transitions. [2021-03-11 00:04:28,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5855 transitions. [2021-03-11 00:04:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:28,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:28,151 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:28,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1730,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:28,352 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:28,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-03-11 00:04:28,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:28,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643192230] [2021-03-11 00:04:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:28,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643192230] [2021-03-11 00:04:28,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367000263] [2021-03-11 00:04:28,951 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 [2021-03-11 00:04:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:04:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:29,466 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:04:29,542 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_186, v_prenex_188], 6=[A, v_prenex_184]} [2021-03-11 00:04:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:29,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:29,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:29,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-11 00:04:29,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:29,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:29,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:29,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-03-11 00:04:29,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:29,737 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-11 00:04:29,738 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.7 percent of original size [2021-03-11 00:04:29,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:29,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:29,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-11 00:04:29,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:29,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:29,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:29,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:29,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:04:29,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:29,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:29,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:29,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:29,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:04:29,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:29,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:29,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:04:29,928 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:381, output treesize:42 [2021-03-11 00:04:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:30,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:30,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:04:30,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149156362] [2021-03-11 00:04:30,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:04:30,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:30,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:04:30,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:04:30,007 INFO L87 Difference]: Start difference. First operand 1734 states and 5855 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:30,895 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2021-03-11 00:04:31,043 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2021-03-11 00:04:31,574 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-03-11 00:04:31,754 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-03-11 00:04:32,005 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-03-11 00:04:32,561 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-03-11 00:04:32,844 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-03-11 00:04:33,066 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2021-03-11 00:04:33,556 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:04:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:33,815 INFO L93 Difference]: Finished difference Result 2395 states and 7862 transitions. [2021-03-11 00:04:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:04:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:33,822 INFO L225 Difference]: With dead ends: 2395 [2021-03-11 00:04:33,822 INFO L226 Difference]: Without dead ends: 2380 [2021-03-11 00:04:33,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3977.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:04:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-03-11 00:04:33,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1734. [2021-03-11 00:04:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.378534333525678) internal successors, (5855), 1733 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5855 transitions. [2021-03-11 00:04:33,855 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5855 transitions. Word has length 26 [2021-03-11 00:04:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:33,855 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5855 transitions. [2021-03-11 00:04:33,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5855 transitions. [2021-03-11 00:04:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:33,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:33,858 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:34,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1844,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:34,071 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:34,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-03-11 00:04:34,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:34,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839688274] [2021-03-11 00:04:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:34,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839688274] [2021-03-11 00:04:34,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496448233] [2021-03-11 00:04:34,686 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 [2021-03-11 00:04:34,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:04:34,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:34,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:04:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,070 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:04:35,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-03-11 00:04:35,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,116 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:04:35,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-03-11 00:04:35,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,162 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-03-11 00:04:35,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-03-11 00:04:35,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,205 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:04:35,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-03-11 00:04:35,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,235 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:04:35,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:04:35,236 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,282 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-03-11 00:04:35,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-03-11 00:04:35,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,332 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:04:35,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-03-11 00:04:35,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,363 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:04:35,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:04:35,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,391 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:04:35,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:04:35,393 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,433 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:04:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-03-11 00:04:35,436 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-03-11 00:04:35,485 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,511 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:04:35,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:04:35,512 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,538 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:04:35,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:04:35,539 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,564 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:04:35,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:04:35,566 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,590 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:04:35,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:04:35,591 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:35,606 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:04:35,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-03-11 00:04:35,607 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:35,751 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:04:35,752 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-03-11 00:04:35,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:04:35,753 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-03-11 00:04:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:35,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:35,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-03-11 00:04:35,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542856397] [2021-03-11 00:04:35,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:04:35,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:04:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:04:35,917 INFO L87 Difference]: Start difference. First operand 1734 states and 5855 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:36,554 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-11 00:04:36,829 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-11 00:04:37,384 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2021-03-11 00:04:38,121 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-03-11 00:04:38,594 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-11 00:04:38,864 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-03-11 00:04:39,083 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:04:39,434 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-11 00:04:39,650 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-03-11 00:04:39,814 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-11 00:04:40,054 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-11 00:04:40,254 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-11 00:04:40,396 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-03-11 00:04:40,816 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:04:40,950 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-11 00:04:41,270 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-11 00:04:41,558 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:04:41,740 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-03-11 00:04:41,990 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-11 00:04:42,145 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-03-11 00:04:42,391 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-03-11 00:04:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:42,480 INFO L93 Difference]: Finished difference Result 3202 states and 10123 transitions. [2021-03-11 00:04:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:04:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:04:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:42,487 INFO L225 Difference]: With dead ends: 3202 [2021-03-11 00:04:42,487 INFO L226 Difference]: Without dead ends: 3138 [2021-03-11 00:04:42,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 6035.7ms TimeCoverageRelationStatistics Valid=727, Invalid=3055, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:04:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2021-03-11 00:04:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1784. [2021-03-11 00:04:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.378014582164891) internal successors, (6023), 1783 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6023 transitions. [2021-03-11 00:04:42,527 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6023 transitions. Word has length 26 [2021-03-11 00:04:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:42,527 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 6023 transitions. [2021-03-11 00:04:42,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6023 transitions. [2021-03-11 00:04:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:42,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:42,529 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:04:42,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1858 [2021-03-11 00:04:42,730 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:42,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:42,730 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-03-11 00:04:42,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:42,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747785371] [2021-03-11 00:04:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:43,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747785371] [2021-03-11 00:04:43,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870343347] [2021-03-11 00:04:43,395 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 [2021-03-11 00:04:43,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:04:43,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:43,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:04:43,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:46,166 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:04:46,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:46,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:46,581 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-03-11 00:04:46,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 34 [2021-03-11 00:04:46,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:46,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:46,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:46,652 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:04:46,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 41 [2021-03-11 00:04:46,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:47,539 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-03-11 00:04:47,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:47,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:47,613 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:04:47,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-03-11 00:04:47,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:47,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:47,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:47,690 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-03-11 00:04:47,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2021-03-11 00:04:47,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:48,396 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-03-11 00:04:48,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:48,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:48,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:48,472 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-11 00:04:48,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 45 [2021-03-11 00:04:48,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:48,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:48,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-03-11 00:04:48,547 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,552 WARN L205 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 169 DAG size of output: 158 [2021-03-11 00:04:50,553 INFO L628 ElimStorePlain]: treesize reduction 75, result has 91.6 percent of original size [2021-03-11 00:04:50,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,630 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-11 00:04:50,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 45 [2021-03-11 00:04:50,638 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,695 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:04:50,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 38 [2021-03-11 00:04:50,703 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:51,347 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-03-11 00:04:51,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:51,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:51,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:51,425 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-11 00:04:51,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 45 [2021-03-11 00:04:51,432 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:51,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:51,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:51,479 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-03-11 00:04:51,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 28 [2021-03-11 00:04:51,481 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:52,079 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-03-11 00:04:52,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:52,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:52,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:52,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:52,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-03-11 00:04:52,159 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:52,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:52,215 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:04:52,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-03-11 00:04:52,222 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:52,774 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-03-11 00:04:52,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:52,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:52,849 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-11 00:04:52,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 45 [2021-03-11 00:04:52,856 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:52,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:52,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:52,921 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-03-11 00:04:52,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 47 [2021-03-11 00:04:52,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:54,028 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2021-03-11 00:04:54,028 INFO L628 ElimStorePlain]: treesize reduction 17, result has 97.5 percent of original size [2021-03-11 00:04:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:54,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:54,087 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-03-11 00:04:54,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 34 [2021-03-11 00:04:54,090 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:54,141 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:04:54,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-03-11 00:04:54,149 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:55,101 WARN L205 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2021-03-11 00:04:55,102 INFO L628 ElimStorePlain]: treesize reduction 46, result has 92.9 percent of original size [2021-03-11 00:04:55,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-03-11 00:04:55,128 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:953, output treesize:1025 [2021-03-11 00:04:55,791 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-03-11 00:04:56,016 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:04:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:56,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:56,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:04:56,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327939625] [2021-03-11 00:04:56,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:04:56,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:56,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:04:56,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:04:56,079 INFO L87 Difference]: Start difference. First operand 1784 states and 6023 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:04:56,659 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-03-11 00:04:56,885 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-11 00:04:57,308 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-03-11 00:04:57,712 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2021-03-11 00:04:57,893 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-03-11 00:04:58,049 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:04:58,330 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-11 00:04:58,668 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:04:58,841 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-11 00:04:58,989 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-11 00:04:59,156 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-03-11 00:04:59,432 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-03-11 00:04:59,806 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-03-11 00:05:00,083 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:05:00,363 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-11 00:05:00,585 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-11 00:05:01,080 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-03-11 00:05:02,391 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-03-11 00:05:02,549 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-03-11 00:05:02,679 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-11 00:05:03,094 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-03-11 00:05:07,734 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-03-11 00:05:07,968 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-11 00:05:08,615 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-11 00:05:09,088 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-03-11 00:05:09,352 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2021-03-11 00:05:09,597 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-03-11 00:05:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:09,781 INFO L93 Difference]: Finished difference Result 2935 states and 9497 transitions. [2021-03-11 00:05:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:05:09,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:05:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:09,787 INFO L225 Difference]: With dead ends: 2935 [2021-03-11 00:05:09,787 INFO L226 Difference]: Without dead ends: 2890 [2021-03-11 00:05:09,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 16264.1ms TimeCoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:05:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-03-11 00:05:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1811. [2021-03-11 00:05:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.387292817679558) internal successors, (6131), 1810 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6131 transitions. [2021-03-11 00:05:09,815 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6131 transitions. Word has length 26 [2021-03-11 00:05:09,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:09,815 INFO L480 AbstractCegarLoop]: Abstraction has 1811 states and 6131 transitions. [2021-03-11 00:05:09,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6131 transitions. [2021-03-11 00:05:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:05:09,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:09,818 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:10,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1883 [2021-03-11 00:05:10,018 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:10,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-03-11 00:05:10,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:10,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221229394] [2021-03-11 00:05:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:10,350 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-11 00:05:10,525 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-11 00:05:10,710 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-03-11 00:05:10,856 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:05:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:11,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221229394] [2021-03-11 00:05:11,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136708798] [2021-03-11 00:05:11,125 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 [2021-03-11 00:05:11,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:05:11,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:05:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:11,896 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:05:12,177 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_212], 6=[v_prenex_210, v_prenex_214]} [2021-03-11 00:05:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:12,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:12,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-11 00:05:12,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:12,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-03-11 00:05:12,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:12,487 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-11 00:05:12,488 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-03-11 00:05:12,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-11 00:05:12,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:12,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:12,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:12,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:12,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:05:12,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:12,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:12,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:12,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:12,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-11 00:05:12,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:12,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:12,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:05:12,757 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-03-11 00:05:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:12,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:12,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:05:12,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621487353] [2021-03-11 00:05:12,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:05:12,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:12,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:05:12,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:05:12,865 INFO L87 Difference]: Start difference. First operand 1811 states and 6131 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:13,451 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-03-11 00:05:13,834 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2021-03-11 00:05:14,013 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2021-03-11 00:05:14,208 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-03-11 00:05:14,533 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-03-11 00:05:14,711 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-03-11 00:05:14,871 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-11 00:05:15,150 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:05:15,444 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2021-03-11 00:05:15,616 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-03-11 00:05:15,919 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-11 00:05:16,195 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-03-11 00:05:16,467 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-11 00:05:16,816 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-11 00:05:17,239 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-03-11 00:05:17,573 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-03-11 00:05:17,881 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:05:18,465 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-03-11 00:05:18,917 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-11 00:05:19,445 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-11 00:05:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:19,496 INFO L93 Difference]: Finished difference Result 2331 states and 7684 transitions. [2021-03-11 00:05:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:05:19,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:05:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:19,502 INFO L225 Difference]: With dead ends: 2331 [2021-03-11 00:05:19,502 INFO L226 Difference]: Without dead ends: 2316 [2021-03-11 00:05:19,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 7049.6ms TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:05:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-03-11 00:05:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1809. [2021-03-11 00:05:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.3871681415929205) internal successors, (6124), 1808 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6124 transitions. [2021-03-11 00:05:19,525 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6124 transitions. Word has length 26 [2021-03-11 00:05:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:19,525 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 6124 transitions. [2021-03-11 00:05:19,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6124 transitions. [2021-03-11 00:05:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:05:19,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:19,528 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:19,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1968,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:05:19,731 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:19,731 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-03-11 00:05:19,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:19,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614140725] [2021-03-11 00:05:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:20,050 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:05:20,210 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-11 00:05:20,468 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:05:20,642 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-11 00:05:20,802 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-11 00:05:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:20,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614140725] [2021-03-11 00:05:20,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146330253] [2021-03-11 00:05:20,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:05:20,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:05:20,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:20,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:05:20,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:22,107 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:05:22,558 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-11 00:05:22,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:22,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:23,024 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:05:23,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-03-11 00:05:23,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:23,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:23,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:23,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:23,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-03-11 00:05:23,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:23,961 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-03-11 00:05:23,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:23,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:24,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:24,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-03-11 00:05:24,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:24,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:24,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:24,119 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:05:24,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-03-11 00:05:24,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:26,647 WARN L205 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-03-11 00:05:26,648 INFO L628 ElimStorePlain]: treesize reduction 48, result has 94.7 percent of original size [2021-03-11 00:05:26,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:26,723 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:05:26,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-03-11 00:05:26,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:26,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:26,790 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:05:26,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-03-11 00:05:26,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:28,311 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 146 DAG size of output: 143 [2021-03-11 00:05:28,312 INFO L628 ElimStorePlain]: treesize reduction 42, result has 94.8 percent of original size [2021-03-11 00:05:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:28,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:28,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:28,392 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:05:28,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-03-11 00:05:28,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:28,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:28,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:28,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:28,466 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:05:28,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-03-11 00:05:28,471 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:29,188 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-11 00:05:29,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:29,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:29,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-03-11 00:05:29,275 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:29,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:29,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:29,308 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-11 00:05:29,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-03-11 00:05:29,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:29,933 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-11 00:05:29,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:29,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,002 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:05:30,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-03-11 00:05:30,006 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:30,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,063 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:05:30,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-03-11 00:05:30,067 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:30,671 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-03-11 00:05:30,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:30,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,745 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-11 00:05:30,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-03-11 00:05:30,750 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:30,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:30,808 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:05:30,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-03-11 00:05:30,818 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:31,919 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-03-11 00:05:31,920 INFO L628 ElimStorePlain]: treesize reduction 42, result has 92.7 percent of original size [2021-03-11 00:05:31,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:31,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:31,999 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-11 00:05:31,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-03-11 00:05:32,009 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:32,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:32,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:32,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:32,086 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-03-11 00:05:32,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-03-11 00:05:32,096 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:32,596 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:05:32,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:32,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-11 00:05:32,640 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:953, output treesize:554 [2021-03-11 00:05:32,965 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2021-03-11 00:05:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:33,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:33,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:05:33,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699124630] [2021-03-11 00:05:33,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:05:33,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:33,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:05:33,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:05:33,104 INFO L87 Difference]: Start difference. First operand 1809 states and 6124 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:33,458 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2021-03-11 00:05:34,038 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-03-11 00:05:34,275 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-03-11 00:05:34,787 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-11 00:05:35,252 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-11 00:05:35,480 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2021-03-11 00:05:36,295 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-11 00:05:36,538 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-03-11 00:05:36,743 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:05:36,994 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-11 00:05:37,386 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-11 00:05:37,732 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-03-11 00:05:38,018 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-11 00:05:41,280 WARN L205 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-03-11 00:05:41,503 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-11 00:05:41,757 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-11 00:05:54,305 WARN L205 SmtUtils]: Spent 12.28 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-03-11 00:06:02,811 WARN L205 SmtUtils]: Spent 8.30 s on a formula simplification. DAG size of input: 181 DAG size of output: 117 [2021-03-11 00:06:03,797 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-11 00:06:04,156 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:06:04,693 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:06:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:04,965 INFO L93 Difference]: Finished difference Result 2608 states and 8601 transitions. [2021-03-11 00:06:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:06:04,967 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:04,971 INFO L225 Difference]: With dead ends: 2608 [2021-03-11 00:06:04,971 INFO L226 Difference]: Without dead ends: 2578 [2021-03-11 00:06:04,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 32461.8ms TimeCoverageRelationStatistics Valid=430, Invalid=2120, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:06:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-03-11 00:06:04,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1812. [2021-03-11 00:06:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 3.3881833241303148) internal successors, (6136), 1811 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 6136 transitions. [2021-03-11 00:06:04,995 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 6136 transitions. Word has length 26 [2021-03-11 00:06:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:04,995 INFO L480 AbstractCegarLoop]: Abstraction has 1812 states and 6136 transitions. [2021-03-11 00:06:04,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 6136 transitions. [2021-03-11 00:06:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:04,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:04,998 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:05,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1982 [2021-03-11 00:06:05,198 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1072819888, now seen corresponding path program 54 times [2021-03-11 00:06:05,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:05,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175366803] [2021-03-11 00:06:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:05,646 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:06:05,953 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-03-11 00:06:06,275 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-03-11 00:06:06,553 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:06:06,742 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-11 00:06:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:06,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175366803] [2021-03-11 00:06:06,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457678029] [2021-03-11 00:06:06,892 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 [2021-03-11 00:06:06,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:06:06,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:06:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:07,508 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:06:07,741 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:06:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:06:08,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:08,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:06:08,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:08,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:06:08,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:06:08,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:08,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:06:08,966 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:08,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:06:09,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:06:09,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:06:09,109 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:06:09,150 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:06:09,192 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:06:09,234 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:06:09,272 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:06:09,305 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:06:09,333 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:09,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:09,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:06:09,349 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:09,444 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-11 00:06:09,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:06:09,447 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:06:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:09,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:09,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:06:09,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96412891] [2021-03-11 00:06:09,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:06:09,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:09,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:06:09,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:06:09,597 INFO L87 Difference]: Start difference. First operand 1812 states and 6136 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:09,833 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-03-11 00:06:10,170 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-11 00:06:10,488 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:06:10,834 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:06:11,050 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-11 00:06:11,481 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-11 00:06:11,903 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-11 00:06:12,253 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:06:12,603 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-11 00:06:12,935 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-11 00:06:13,531 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:06:14,038 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:06:14,369 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:06:14,977 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-11 00:06:15,368 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-11 00:06:15,783 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:06:16,431 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:06:16,941 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-11 00:06:17,540 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-11 00:06:18,166 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-11 00:06:18,953 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:06:19,871 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:06:20,585 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-03-11 00:06:21,458 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-03-11 00:06:22,630 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-03-11 00:06:23,500 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-03-11 00:06:24,649 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-03-11 00:06:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:25,712 INFO L93 Difference]: Finished difference Result 2406 states and 7706 transitions. [2021-03-11 00:06:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:06:25,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:25,719 INFO L225 Difference]: With dead ends: 2406 [2021-03-11 00:06:25,719 INFO L226 Difference]: Without dead ends: 2376 [2021-03-11 00:06:25,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 15058.6ms TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:06:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-03-11 00:06:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1827. [2021-03-11 00:06:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.394852135815991) internal successors, (6199), 1826 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6199 transitions. [2021-03-11 00:06:25,743 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6199 transitions. Word has length 26 [2021-03-11 00:06:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:25,743 INFO L480 AbstractCegarLoop]: Abstraction has 1827 states and 6199 transitions. [2021-03-11 00:06:25,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6199 transitions. [2021-03-11 00:06:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:25,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:25,745 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:25,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2052,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:25,946 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-03-11 00:06:25,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:25,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879332406] [2021-03-11 00:06:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:26,401 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:06:26,707 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-03-11 00:06:27,029 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-11 00:06:27,311 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:06:27,490 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-11 00:06:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:27,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879332406] [2021-03-11 00:06:27,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652667677] [2021-03-11 00:06:27,618 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 [2021-03-11 00:06:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:27,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:06:27,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:28,076 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:06:28,331 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:06:28,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,561 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:06:28,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-03-11 00:06:28,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:28,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,703 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:06:28,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-03-11 00:06:28,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,836 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-03-11 00:06:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-03-11 00:06:28,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:28,963 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:06:28,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-03-11 00:06:28,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,051 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:29,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:06:29,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,178 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-03-11 00:06:29,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-03-11 00:06:29,191 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,280 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:06:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-03-11 00:06:29,283 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,331 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:29,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:06:29,334 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,392 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:29,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:06:29,395 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,508 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:06:29,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-03-11 00:06:29,513 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:29,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-03-11 00:06:29,661 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,734 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:29,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:06:29,738 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,811 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:29,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:06:29,814 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,877 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:29,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:06:29,881 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,942 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:29,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:06:29,945 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:29,978 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:29,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-03-11 00:06:29,980 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:30,407 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:06:30,408 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-03-11 00:06:30,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:06:30,411 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-03-11 00:06:30,690 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:06:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:30,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:30,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:06:30,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410291117] [2021-03-11 00:06:30,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:06:30,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:30,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:06:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:06:30,884 INFO L87 Difference]: Start difference. First operand 1827 states and 6199 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:31,252 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-11 00:06:31,470 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2021-03-11 00:06:31,834 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-03-11 00:06:32,261 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-03-11 00:06:32,754 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-03-11 00:06:33,087 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-03-11 00:06:33,310 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:06:33,895 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:06:34,301 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-03-11 00:06:34,685 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-03-11 00:06:35,020 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:06:35,824 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-11 00:06:36,165 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:06:36,630 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:06:37,157 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2021-03-11 00:06:37,553 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-03-11 00:06:38,223 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-11 00:06:39,097 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-11 00:06:39,365 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:06:39,866 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-03-11 00:06:40,550 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-11 00:06:41,130 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-11 00:06:41,392 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:06:41,944 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-11 00:06:42,645 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-03-11 00:06:43,402 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:06:43,860 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:06:44,678 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:06:45,293 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-03-11 00:06:45,963 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-11 00:06:46,981 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-03-11 00:06:47,861 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-11 00:06:48,191 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-11 00:06:48,924 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:06:49,689 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:06:50,076 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:06:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:50,165 INFO L93 Difference]: Finished difference Result 3227 states and 10321 transitions. [2021-03-11 00:06:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:06:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:50,174 INFO L225 Difference]: With dead ends: 3227 [2021-03-11 00:06:50,174 INFO L226 Difference]: Without dead ends: 3193 [2021-03-11 00:06:50,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 18951.0ms TimeCoverageRelationStatistics Valid=711, Invalid=2595, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:06:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-03-11 00:06:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 1832. [2021-03-11 00:06:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.399235390496996) internal successors, (6224), 1831 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6224 transitions. [2021-03-11 00:06:50,206 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6224 transitions. Word has length 26 [2021-03-11 00:06:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:50,206 INFO L480 AbstractCegarLoop]: Abstraction has 1832 states and 6224 transitions. [2021-03-11 00:06:50,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6224 transitions. [2021-03-11 00:06:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:50,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:50,209 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:50,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2166 [2021-03-11 00:06:50,409 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 28 times [2021-03-11 00:06:50,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:50,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208497536] [2021-03-11 00:06:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:50,979 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:06:51,303 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:06:51,600 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-11 00:06:51,788 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:06:52,011 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-11 00:06:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:52,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208497536] [2021-03-11 00:06:52,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725162376] [2021-03-11 00:06:52,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:06:52,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:06:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:06:52,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:52,635 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:06:52,913 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:06:53,189 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:06:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:06:53,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:06:53,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:06:53,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:06:53,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:06:53,805 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:06:53,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:06:53,873 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:06:53,903 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:06:53,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:06:53,971 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:06:53,999 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:54,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:54,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:54,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:06:54,027 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:54,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:54,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:54,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:54,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:06:54,054 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:54,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:54,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:54,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:06:54,080 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:54,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:54,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:54,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:06:54,098 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:54,486 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:06:54,487 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:06:54,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:06:54,491 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:06:54,660 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:06:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:54,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:54,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:06:54,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049763029] [2021-03-11 00:06:54,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:06:54,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:54,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:06:54,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:06:54,702 INFO L87 Difference]: Start difference. First operand 1832 states and 6224 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:55,102 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-03-11 00:06:55,869 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-11 00:06:56,065 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:06:56,408 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2021-03-11 00:06:57,144 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-11 00:06:57,957 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-11 00:06:58,574 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-11 00:06:58,827 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:06:59,700 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-11 00:07:00,462 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-11 00:07:01,065 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:07:02,132 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-03-11 00:07:02,361 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:07:03,097 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:07:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:03,744 INFO L93 Difference]: Finished difference Result 2398 states and 7951 transitions. [2021-03-11 00:07:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:07:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:03,752 INFO L225 Difference]: With dead ends: 2398 [2021-03-11 00:07:03,752 INFO L226 Difference]: Without dead ends: 2383 [2021-03-11 00:07:03,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 9163.6ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:07:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-03-11 00:07:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1847. [2021-03-11 00:07:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.397074756229686) internal successors, (6271), 1846 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 6271 transitions. [2021-03-11 00:07:03,778 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 6271 transitions. Word has length 26 [2021-03-11 00:07:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:03,778 INFO L480 AbstractCegarLoop]: Abstraction has 1847 states and 6271 transitions. [2021-03-11 00:07:03,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 6271 transitions. [2021-03-11 00:07:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:03,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:03,781 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:03,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2191,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:03,983 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 29 times [2021-03-11 00:07:03,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:03,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290866911] [2021-03-11 00:07:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:04,493 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-11 00:07:04,800 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:07:05,030 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-11 00:07:05,246 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:07:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:05,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290866911] [2021-03-11 00:07:05,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938588743] [2021-03-11 00:07:05,389 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 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 [2021-03-11 00:07:05,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:07:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:07:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:05,978 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:06,233 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:07:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:06,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:06,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,442 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:06,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:06,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,483 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:06,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:06,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,544 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:06,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:07:06,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,608 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:06,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:07:06,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:06,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:07:06,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,710 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:06,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:06,715 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:06,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:07:06,769 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:06,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:07:06,839 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,877 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:06,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:07:06,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,920 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:06,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:07:06,924 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:06,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:06,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:07:06,986 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:06,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:07,043 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:07,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:07:07,049 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:07,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:07,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:07,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:07:07,116 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:07,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:07,153 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:07,157 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:07,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:07,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:07,184 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:07,523 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:07,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:07,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:07:07,527 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:07:07,939 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:08,325 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:07:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:08,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:08,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:07:08,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882257052] [2021-03-11 00:07:08,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:07:08,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:08,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:07:08,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:07:08,383 INFO L87 Difference]: Start difference. First operand 1847 states and 6271 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:08,890 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-03-11 00:07:09,874 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-11 00:07:10,312 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:07:10,705 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2021-03-11 00:07:11,926 WARN L205 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2021-03-11 00:07:12,100 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:07:12,356 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:07:13,115 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-03-11 00:07:13,879 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-03-11 00:07:15,004 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-11 00:07:15,890 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-03-11 00:07:16,838 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:17,077 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:07:17,624 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:07:19,001 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-11 00:07:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:19,519 INFO L93 Difference]: Finished difference Result 2710 states and 8888 transitions. [2021-03-11 00:07:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:07:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:19,527 INFO L225 Difference]: With dead ends: 2710 [2021-03-11 00:07:19,527 INFO L226 Difference]: Without dead ends: 2680 [2021-03-11 00:07:19,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 11576.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:07:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-03-11 00:07:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1853. [2021-03-11 00:07:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.39902807775378) internal successors, (6295), 1852 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6295 transitions. [2021-03-11 00:07:19,554 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6295 transitions. Word has length 26 [2021-03-11 00:07:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:19,555 INFO L480 AbstractCegarLoop]: Abstraction has 1853 states and 6295 transitions. [2021-03-11 00:07:19,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:19,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6295 transitions. [2021-03-11 00:07:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:19,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:19,557 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:19,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2223 [2021-03-11 00:07:19,758 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:19,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:19,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1531090714, now seen corresponding path program 30 times [2021-03-11 00:07:19,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:19,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091877087] [2021-03-11 00:07:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:20,440 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:07:20,792 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-11 00:07:21,034 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:07:21,307 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-11 00:07:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:21,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091877087] [2021-03-11 00:07:21,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48917023] [2021-03-11 00:07:21,458 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 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 [2021-03-11 00:07:21,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:07:21,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:07:21,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:22,125 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:22,394 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:07:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:22,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:22,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,600 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:22,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:22,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,648 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:22,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:22,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,715 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:22,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:07:22,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,787 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:22,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:07:22,794 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:22,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:07:22,881 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,922 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:22,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:22,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:22,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:07:22,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:23,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:07:23,068 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,107 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:23,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:07:23,111 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,155 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:23,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:07:23,159 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:23,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:07:23,225 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,286 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:23,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:07:23,293 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:23,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:07:23,365 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:23,410 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,434 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:23,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:23,438 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,826 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:23,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:23,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:07:23,831 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:07:24,294 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:24,706 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:07:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:24,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:24,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:07:24,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49212625] [2021-03-11 00:07:24,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:07:24,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:24,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:07:24,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:07:24,780 INFO L87 Difference]: Start difference. First operand 1853 states and 6295 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:25,264 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2021-03-11 00:07:25,605 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:07:26,115 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-11 00:07:26,564 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-11 00:07:26,975 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2021-03-11 00:07:27,371 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:28,929 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-03-11 00:07:29,150 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:07:29,644 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-11 00:07:30,343 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-03-11 00:07:31,145 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-11 00:07:32,265 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-03-11 00:07:33,925 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-03-11 00:07:34,971 WARN L205 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-03-11 00:07:36,002 WARN L205 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-03-11 00:07:36,495 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:37,888 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:07:39,336 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-03-11 00:07:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:39,932 INFO L93 Difference]: Finished difference Result 2506 states and 8354 transitions. [2021-03-11 00:07:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:07:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:39,940 INFO L225 Difference]: With dead ends: 2506 [2021-03-11 00:07:39,941 INFO L226 Difference]: Without dead ends: 2491 [2021-03-11 00:07:39,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 15171.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:07:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-03-11 00:07:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1849. [2021-03-11 00:07:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.3955627705627704) internal successors, (6275), 1848 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6275 transitions. [2021-03-11 00:07:39,973 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6275 transitions. Word has length 26 [2021-03-11 00:07:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:39,973 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6275 transitions. [2021-03-11 00:07:39,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6275 transitions. [2021-03-11 00:07:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:39,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:39,977 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:40,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2240,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:40,191 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:40,191 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 31 times [2021-03-11 00:07:40,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:40,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952440427] [2021-03-11 00:07:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:40,767 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:07:40,974 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:07:41,216 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-11 00:07:41,441 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-11 00:07:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:41,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952440427] [2021-03-11 00:07:41,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036678920] [2021-03-11 00:07:41,584 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 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 [2021-03-11 00:07:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:41,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:07:41,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:42,229 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:07:42,494 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:07:42,806 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:43,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:07:43,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:43,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:43,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:43,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:43,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:43,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:43,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:07:43,631 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:07:43,673 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:07:43,709 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:43,742 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:43,781 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:07:43,807 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:43,844 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:43,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:43,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:43,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:43,865 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,337 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-11 00:07:44,339 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:07:44,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:07:44,344 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:07:44,578 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-03-11 00:07:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:44,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:44,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:07:44,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469514439] [2021-03-11 00:07:44,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:07:44,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:07:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:07:44,637 INFO L87 Difference]: Start difference. First operand 1849 states and 6275 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:44,878 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-11 00:07:45,286 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:07:45,835 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:46,461 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:07:46,852 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:07:47,342 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:07:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:47,411 INFO L93 Difference]: Finished difference Result 2303 states and 7667 transitions. [2021-03-11 00:07:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:07:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:47,421 INFO L225 Difference]: With dead ends: 2303 [2021-03-11 00:07:47,421 INFO L226 Difference]: Without dead ends: 2282 [2021-03-11 00:07:47,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4058.7ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:07:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-03-11 00:07:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1864. [2021-03-11 00:07:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.3988191089640365) internal successors, (6332), 1863 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6332 transitions. [2021-03-11 00:07:47,447 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6332 transitions. Word has length 26 [2021-03-11 00:07:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:47,447 INFO L480 AbstractCegarLoop]: Abstraction has 1864 states and 6332 transitions. [2021-03-11 00:07:47,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6332 transitions. [2021-03-11 00:07:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:47,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:47,450 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:47,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2257 [2021-03-11 00:07:47,650 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash 495653818, now seen corresponding path program 32 times [2021-03-11 00:07:47,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:47,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385629318] [2021-03-11 00:07:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:48,350 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-11 00:07:48,602 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-11 00:07:49,028 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-11 00:07:49,429 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:07:49,568 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-03-11 00:07:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:49,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385629318] [2021-03-11 00:07:49,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908296894] [2021-03-11 00:07:49,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:07:49,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:07:49,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:49,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:07:49,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:50,303 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:07:50,762 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:07:51,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:51,681 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:07:51,682 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:07:51,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:07:51,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:51,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:51,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:07:51,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,691 WARN L205 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:07:52,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,825 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:07:52,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:07:52,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,931 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:07:52,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:07:52,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:53,767 WARN L205 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-11 00:07:53,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:53,895 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:07:53,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:07:53,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:53,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:53,996 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:07:53,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:07:54,003 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:54,790 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-11 00:07:54,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:54,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:54,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:54,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:07:54,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:54,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:54,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:54,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:07:54,993 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:56,502 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-03-11 00:07:56,503 INFO L628 ElimStorePlain]: treesize reduction 17, result has 93.7 percent of original size [2021-03-11 00:07:56,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:07:56,562 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:357, output treesize:292 [2021-03-11 00:07:57,861 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-11 00:07:58,276 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-11 00:07:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:58,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:58,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:07:58,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664722392] [2021-03-11 00:07:58,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:07:58,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:07:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:07:58,361 INFO L87 Difference]: Start difference. First operand 1864 states and 6332 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:58,621 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-11 00:07:58,946 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:07:59,344 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-03-11 00:07:59,847 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-11 00:08:01,709 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-03-11 00:08:02,455 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-03-11 00:08:03,667 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-11 00:08:04,492 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:08:05,471 WARN L205 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-11 00:08:06,892 WARN L205 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-03-11 00:08:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:07,101 INFO L93 Difference]: Finished difference Result 2295 states and 7632 transitions. [2021-03-11 00:08:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:08:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:07,109 INFO L225 Difference]: With dead ends: 2295 [2021-03-11 00:08:07,109 INFO L226 Difference]: Without dead ends: 2266 [2021-03-11 00:08:07,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 11441.1ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:08:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-03-11 00:08:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1849. [2021-03-11 00:08:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.3955627705627704) internal successors, (6275), 1848 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6275 transitions. [2021-03-11 00:08:07,134 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6275 transitions. Word has length 26 [2021-03-11 00:08:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:07,134 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6275 transitions. [2021-03-11 00:08:07,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6275 transitions. [2021-03-11 00:08:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:07,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:07,137 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:07,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2291 [2021-03-11 00:08:07,337 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 33 times [2021-03-11 00:08:07,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:07,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604349893] [2021-03-11 00:08:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:07,576 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-11 00:08:08,001 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-11 00:08:08,215 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-11 00:08:08,393 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:08:08,616 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:08:08,754 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-03-11 00:08:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:08,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604349893] [2021-03-11 00:08:08,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236174329] [2021-03-11 00:08:08,758 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 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 [2021-03-11 00:08:08,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:08,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:08,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:08:08,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:09,521 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:08:09,937 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:08:10,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:10,928 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:08:10,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:08:10,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:11,049 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:08:11,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:08:11,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:11,761 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:08:11,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:11,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:11,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:08:11,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:11,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:12,003 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:08:12,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:08:12,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:12,768 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:08:12,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:12,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:12,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:12,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:08:12,905 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:12,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:13,004 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:08:13,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:08:13,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:14,443 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-11 00:08:14,444 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-03-11 00:08:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:14,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:14,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:08:14,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:14,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:14,664 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:08:14,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:08:14,670 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:15,941 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:08:15,943 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-03-11 00:08:16,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:16,003 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-03-11 00:08:17,159 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-11 00:08:17,602 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:08:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:17,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:17,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:08:17,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18216035] [2021-03-11 00:08:17,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:08:17,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:08:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:08:17,697 INFO L87 Difference]: Start difference. First operand 1849 states and 6275 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:17,926 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-11 00:08:18,388 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:08:18,879 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-11 00:08:19,480 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:08:20,036 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-11 00:08:20,707 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:08:21,712 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-11 00:08:22,879 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-11 00:08:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:23,114 INFO L93 Difference]: Finished difference Result 2056 states and 6874 transitions. [2021-03-11 00:08:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:08:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:23,122 INFO L225 Difference]: With dead ends: 2056 [2021-03-11 00:08:23,122 INFO L226 Difference]: Without dead ends: 2031 [2021-03-11 00:08:23,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 7537.1ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:08:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-03-11 00:08:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1831. [2021-03-11 00:08:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.3994535519125684) internal successors, (6221), 1830 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6221 transitions. [2021-03-11 00:08:23,147 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6221 transitions. Word has length 26 [2021-03-11 00:08:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:23,147 INFO L480 AbstractCegarLoop]: Abstraction has 1831 states and 6221 transitions. [2021-03-11 00:08:23,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6221 transitions. [2021-03-11 00:08:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:23,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:23,150 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:23,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2336,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:23,350 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:23,351 INFO L82 PathProgramCache]: Analyzing trace with hash 939333122, now seen corresponding path program 34 times [2021-03-11 00:08:23,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:23,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950526613] [2021-03-11 00:08:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:24,155 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-11 00:08:24,467 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:08:24,660 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:08:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:24,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950526613] [2021-03-11 00:08:24,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45823037] [2021-03-11 00:08:24,942 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 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 [2021-03-11 00:08:24,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:24,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:24,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:08:24,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:25,695 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:08:26,756 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-03-11 00:08:27,252 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_261], 3=[v_prenex_260, v_prenex_262]} [2021-03-11 00:08:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:27,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:27,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:08:27,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:27,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:27,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:08:27,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:28,158 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:08:28,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:28,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:28,228 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:28,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:08:28,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:28,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:28,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:28,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:08:28,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:29,026 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:08:29,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:29,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:29,101 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:08:29,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-03-11 00:08:29,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:29,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:29,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:29,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-03-11 00:08:29,183 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:29,868 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:08:29,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:29,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:29,931 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:08:29,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-03-11 00:08:29,938 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:29,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:29,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-03-11 00:08:30,002 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:30,608 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:08:30,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:30,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:30,628 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:357, output treesize:194 [2021-03-11 00:08:31,203 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:08:31,682 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-11 00:08:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:31,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:31,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:08:31,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587373233] [2021-03-11 00:08:31,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:08:31,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:31,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:08:31,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:08:31,797 INFO L87 Difference]: Start difference. First operand 1831 states and 6221 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:33,226 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-03-11 00:08:34,493 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:08:35,192 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-03-11 00:08:35,712 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:08:36,449 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:08:37,028 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:08:38,107 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:08:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:38,456 INFO L93 Difference]: Finished difference Result 2461 states and 8160 transitions. [2021-03-11 00:08:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:08:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:38,466 INFO L225 Difference]: With dead ends: 2461 [2021-03-11 00:08:38,466 INFO L226 Difference]: Without dead ends: 2436 [2021-03-11 00:08:38,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 8620.5ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:08:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-03-11 00:08:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1819. [2021-03-11 00:08:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.3987898789878987) internal successors, (6179), 1818 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6179 transitions. [2021-03-11 00:08:38,491 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6179 transitions. Word has length 26 [2021-03-11 00:08:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:38,491 INFO L480 AbstractCegarLoop]: Abstraction has 1819 states and 6179 transitions. [2021-03-11 00:08:38,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6179 transitions. [2021-03-11 00:08:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:38,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:38,494 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:38,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2392,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:38,707 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 35 times [2021-03-11 00:08:38,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:38,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901880507] [2021-03-11 00:08:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:39,023 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:08:39,239 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:08:39,568 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-11 00:08:39,931 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:08:40,267 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-11 00:08:40,492 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:08:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901880507] [2021-03-11 00:08:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350374509] [2021-03-11 00:08:40,497 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 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 [2021-03-11 00:08:40,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:40,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:40,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:08:40,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:41,158 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:08:41,452 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:08:41,756 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:08:42,167 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:08:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:42,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:42,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:42,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:42,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:42,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:42,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:08:42,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:08:42,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:42,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:42,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:42,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:08:42,948 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:42,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:08:42,979 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:42,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-11 00:08:43,010 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:43,041 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:08:43,072 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:43,103 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:08:43,133 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:43,157 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:43,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:43,179 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,654 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:08:43,655 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:08:43,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:08:43,661 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:08:43,914 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:08:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:43,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:43,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:08:43,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548722896] [2021-03-11 00:08:43,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:08:43,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:43,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:08:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:08:43,977 INFO L87 Difference]: Start difference. First operand 1819 states and 6179 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:44,307 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-11 00:08:44,903 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:08:45,772 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-03-11 00:08:46,251 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-11 00:08:47,256 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-11 00:08:48,193 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:08:48,741 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:08:49,152 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:08:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:49,293 INFO L93 Difference]: Finished difference Result 2320 states and 7724 transitions. [2021-03-11 00:08:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:08:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:49,301 INFO L225 Difference]: With dead ends: 2320 [2021-03-11 00:08:49,301 INFO L226 Difference]: Without dead ends: 2305 [2021-03-11 00:08:49,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 7098.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:08:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-03-11 00:08:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1855. [2021-03-11 00:08:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.3910463861920173) internal successors, (6287), 1854 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6287 transitions. [2021-03-11 00:08:49,335 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6287 transitions. Word has length 26 [2021-03-11 00:08:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:49,336 INFO L480 AbstractCegarLoop]: Abstraction has 1855 states and 6287 transitions. [2021-03-11 00:08:49,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6287 transitions. [2021-03-11 00:08:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:49,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:49,338 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:49,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-03-11 00:08:49,539 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:49,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:49,539 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 36 times [2021-03-11 00:08:49,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:49,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446073096] [2021-03-11 00:08:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:49,812 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:08:49,949 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:08:50,263 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-11 00:08:50,654 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:08:50,894 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:08:51,105 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-11 00:08:51,294 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-03-11 00:08:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:51,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446073096] [2021-03-11 00:08:51,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236523852] [2021-03-11 00:08:51,299 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 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 [2021-03-11 00:08:51,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:08:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:51,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:08:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:51,898 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:08:52,111 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:08:52,435 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:08:53,061 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:08:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:08:53,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,173 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:08:53,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:08:53,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,218 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:08:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:53,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,263 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:08:53,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:08:53,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:53,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:08:53,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:53,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:08:53,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,491 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:08:53,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:08:53,495 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,539 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:08:53,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:08:53,543 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,583 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:08:53,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:08:53,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,700 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:08:53,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:08:53,719 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,814 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:08:53,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:08:53,821 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,864 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:08:53,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:08:53,869 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:53,976 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:08:53,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:08:53,996 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:54,037 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:08:54,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:54,041 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:54,083 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:08:54,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:08:54,087 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:54,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:54,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:08:54,176 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:54,795 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:08:54,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:54,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:54,833 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:376 [2021-03-11 00:08:56,058 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-11 00:08:57,210 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:08:57,699 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:08:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:57,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:57,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:08:57,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941584751] [2021-03-11 00:08:57,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:08:57,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:08:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:08:57,745 INFO L87 Difference]: Start difference. First operand 1855 states and 6287 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:58,086 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-11 00:08:58,540 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-11 00:08:58,874 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-11 00:09:00,558 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-03-11 00:09:01,269 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-11 00:09:01,850 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:09:02,894 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-11 00:09:03,166 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:09:03,988 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:09:05,792 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-11 00:09:07,144 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-11 00:09:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:07,536 INFO L93 Difference]: Finished difference Result 2577 states and 8546 transitions. [2021-03-11 00:09:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:09:07,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:07,544 INFO L225 Difference]: With dead ends: 2577 [2021-03-11 00:09:07,544 INFO L226 Difference]: Without dead ends: 2562 [2021-03-11 00:09:07,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 13135.9ms TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:09:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-03-11 00:09:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1865. [2021-03-11 00:09:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 3.3953862660944205) internal successors, (6329), 1864 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6329 transitions. [2021-03-11 00:09:07,571 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6329 transitions. Word has length 26 [2021-03-11 00:09:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:07,571 INFO L480 AbstractCegarLoop]: Abstraction has 1865 states and 6329 transitions. [2021-03-11 00:09:07,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6329 transitions. [2021-03-11 00:09:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:07,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:07,574 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:07,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2458 [2021-03-11 00:09:07,774 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 37 times [2021-03-11 00:09:07,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:07,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901975115] [2021-03-11 00:09:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:08,340 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:09:08,564 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:09:08,778 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-11 00:09:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:08,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901975115] [2021-03-11 00:09:08,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486253479] [2021-03-11 00:09:08,945 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 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 [2021-03-11 00:09:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:09:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:09,564 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:09:09,766 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:09:10,144 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:09:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:10,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:10,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:10,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:10,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:10,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:10,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:10,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:10,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:10,983 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-11 00:09:10,984 INFO L628 ElimStorePlain]: treesize reduction 100, result has 55.6 percent of original size [2021-03-11 00:09:10,984 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-03-11 00:09:10,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:10,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:10,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:11,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:11,286 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:09:11,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:11,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:11,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:11,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:11,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:11,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:11,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:11,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:11,338 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:11,554 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:09:11,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:11,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:09:11,563 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-03-11 00:09:11,787 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:09:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:11,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:11,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:09:11,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866370992] [2021-03-11 00:09:11,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:11,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:11,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:11,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:11,885 INFO L87 Difference]: Start difference. First operand 1865 states and 6329 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:12,515 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:09:13,144 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-11 00:09:13,439 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:09:13,746 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-11 00:09:14,246 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-11 00:09:14,593 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-11 00:09:15,757 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:09:16,274 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:09:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:16,470 INFO L93 Difference]: Finished difference Result 2506 states and 8276 transitions. [2021-03-11 00:09:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:09:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:16,479 INFO L225 Difference]: With dead ends: 2506 [2021-03-11 00:09:16,479 INFO L226 Difference]: Without dead ends: 2476 [2021-03-11 00:09:16,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5424.3ms TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:09:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-03-11 00:09:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1867. [2021-03-11 00:09:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.397106109324759) internal successors, (6339), 1866 states have internal predecessors, (6339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6339 transitions. [2021-03-11 00:09:16,505 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6339 transitions. Word has length 26 [2021-03-11 00:09:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:16,505 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 6339 transitions. [2021-03-11 00:09:16,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6339 transitions. [2021-03-11 00:09:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:16,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:16,507 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:16,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2510 [2021-03-11 00:09:16,708 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 38 times [2021-03-11 00:09:16,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:16,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802910138] [2021-03-11 00:09:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:16,879 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-11 00:09:17,001 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-11 00:09:17,314 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:09:17,644 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:09:18,009 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:09:18,161 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-03-11 00:09:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:18,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802910138] [2021-03-11 00:09:18,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412139245] [2021-03-11 00:09:18,300 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 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 [2021-03-11 00:09:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:09:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:19,205 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-11 00:09:19,604 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:09:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:20,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:09:20,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:20,733 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:20,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:20,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:22,286 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-03-11 00:09:22,288 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-03-11 00:09:22,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:22,423 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:22,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:09:22,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:22,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:22,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:09:22,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:23,914 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-03-11 00:09:23,916 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-03-11 00:09:23,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:24,023 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:24,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:09:24,032 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:24,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:24,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:24,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:09:24,128 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:24,824 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:09:24,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:24,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:24,948 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:24,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:09:24,955 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:25,060 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:25,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:09:25,079 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:25,747 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:09:25,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:25,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:25,810 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:253 [2021-03-11 00:09:26,959 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:09:27,359 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-11 00:09:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:27,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:27,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:09:27,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622229075] [2021-03-11 00:09:27,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:09:27,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:09:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:09:27,446 INFO L87 Difference]: Start difference. First operand 1867 states and 6339 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:28,771 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:09:30,355 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-11 00:09:30,836 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:09:31,289 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:09:31,936 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:09:32,794 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:09:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:32,925 INFO L93 Difference]: Finished difference Result 2436 states and 8120 transitions. [2021-03-11 00:09:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:09:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:32,933 INFO L225 Difference]: With dead ends: 2436 [2021-03-11 00:09:32,933 INFO L226 Difference]: Without dead ends: 2421 [2021-03-11 00:09:32,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 8344.8ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:09:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2021-03-11 00:09:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1885. [2021-03-11 00:09:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.393312101910828) internal successors, (6393), 1884 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6393 transitions. [2021-03-11 00:09:32,958 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6393 transitions. Word has length 26 [2021-03-11 00:09:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:32,958 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 6393 transitions. [2021-03-11 00:09:32,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6393 transitions. [2021-03-11 00:09:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:32,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:32,960 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:33,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2521 [2021-03-11 00:09:33,161 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 39 times [2021-03-11 00:09:33,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:33,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16871611] [2021-03-11 00:09:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:33,538 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-11 00:09:33,843 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-11 00:09:34,067 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:09:34,406 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:09:34,708 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:09:34,865 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:09:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:34,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16871611] [2021-03-11 00:09:34,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959562805] [2021-03-11 00:09:34,869 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 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 [2021-03-11 00:09:34,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:34,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:34,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:09:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:35,314 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:09:35,744 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:09:36,776 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:09:38,020 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-03-11 00:09:38,347 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_285], 2=[A, v_prenex_284]} [2021-03-11 00:09:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:38,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:38,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:38,993 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:09:38,995 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:09:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:39,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:39,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:39,301 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:09:39,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:39,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:39,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:39,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:39,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:39,600 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:09:39,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:39,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:09:39,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:09:39,858 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-03-11 00:09:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:39,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:39,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:09:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231199679] [2021-03-11 00:09:39,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:09:39,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:39,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:09:39,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:09:39,943 INFO L87 Difference]: Start difference. First operand 1885 states and 6393 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:40,200 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-11 00:09:40,552 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:09:41,332 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:09:42,034 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:09:42,255 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:09:42,663 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-11 00:09:43,286 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:09:44,438 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:09:45,894 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-03-11 00:09:46,756 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-11 00:09:47,348 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:09:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:47,450 INFO L93 Difference]: Finished difference Result 2516 states and 8289 transitions. [2021-03-11 00:09:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:09:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:47,459 INFO L225 Difference]: With dead ends: 2516 [2021-03-11 00:09:47,459 INFO L226 Difference]: Without dead ends: 2471 [2021-03-11 00:09:47,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 9716.7ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:09:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-03-11 00:09:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1925. [2021-03-11 00:09:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 3.396049896049896) internal successors, (6534), 1924 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 6534 transitions. [2021-03-11 00:09:47,486 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 6534 transitions. Word has length 26 [2021-03-11 00:09:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:47,486 INFO L480 AbstractCegarLoop]: Abstraction has 1925 states and 6534 transitions. [2021-03-11 00:09:47,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 6534 transitions. [2021-03-11 00:09:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:47,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:47,489 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:47,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2579,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:47,689 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 40 times [2021-03-11 00:09:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:47,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116879196] [2021-03-11 00:09:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:48,399 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-11 00:09:48,653 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:09:49,008 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:09:49,191 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-11 00:09:49,348 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:09:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:49,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116879196] [2021-03-11 00:09:49,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998208884] [2021-03-11 00:09:49,352 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 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 [2021-03-11 00:09:49,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:49,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:09:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:49,780 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:09:50,253 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:09:51,289 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:09:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:51,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:51,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:09:51,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:52,148 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 00:09:52,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:52,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:52,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:52,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:52,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:52,785 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-11 00:09:52,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:52,840 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:52,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:09:52,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:53,410 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:09:53,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:53,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:53,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:53,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:09:53,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:54,025 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:09:54,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:54,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:54,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:54,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:09:54,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:54,624 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-11 00:09:54,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:54,676 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:54,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:54,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,250 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:09:55,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:55,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,305 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:55,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:55,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:55,858 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:09:55,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:55,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:55,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:55,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:09:55,912 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:56,466 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:09:56,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:56,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:56,487 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-03-11 00:09:57,034 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:09:57,476 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:09:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:57,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:57,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:09:57,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65244477] [2021-03-11 00:09:57,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:09:57,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:09:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:09:57,594 INFO L87 Difference]: Start difference. First operand 1925 states and 6534 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:57,877 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-11 00:09:58,230 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:09:59,259 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-11 00:09:59,598 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-11 00:10:00,230 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:10:00,910 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:10:01,978 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:10:03,939 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-03-11 00:10:05,338 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-03-11 00:10:06,510 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-03-11 00:10:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:07,068 INFO L93 Difference]: Finished difference Result 2715 states and 8950 transitions. [2021-03-11 00:10:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:10:07,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:07,077 INFO L225 Difference]: With dead ends: 2715 [2021-03-11 00:10:07,077 INFO L226 Difference]: Without dead ends: 2685 [2021-03-11 00:10:07,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 11382.6ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:10:07,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-03-11 00:10:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1914. [2021-03-11 00:10:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.3946680606377417) internal successors, (6494), 1913 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:07,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6494 transitions. [2021-03-11 00:10:07,108 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6494 transitions. Word has length 26 [2021-03-11 00:10:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:07,108 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 6494 transitions. [2021-03-11 00:10:07,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6494 transitions. [2021-03-11 00:10:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:07,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:07,111 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:07,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2590,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:07,312 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 41 times [2021-03-11 00:10:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:07,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846834534] [2021-03-11 00:10:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:08,153 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:10:08,557 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:10:08,817 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:10:09,079 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-03-11 00:10:09,325 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-03-11 00:10:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:09,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846834534] [2021-03-11 00:10:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741616080] [2021-03-11 00:10:09,330 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 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 [2021-03-11 00:10:09,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:10:09,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:09,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:09,946 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:10:10,419 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:10:11,456 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-03-11 00:10:12,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:12,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:12,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:10:12,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:12,149 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:12,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:10:12,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:12,905 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:10:12,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:12,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:12,981 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:12,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:10:12,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:13,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:13,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:13,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:10:13,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:13,754 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:10:13,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:13,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:13,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:13,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:10:13,826 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:13,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:13,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:13,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:10:13,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:14,551 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:10:14,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:14,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:14,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:10:14,628 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:14,682 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:14,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:10:14,691 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:15,321 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:10:15,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:15,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:15,343 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-03-11 00:10:15,911 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:10:16,404 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:10:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:16,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:16,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:10:16,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504607048] [2021-03-11 00:10:16,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:16,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:16,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:16,533 INFO L87 Difference]: Start difference. First operand 1914 states and 6494 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:17,271 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2021-03-11 00:10:17,775 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:10:18,183 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-11 00:10:18,740 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:10:19,221 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:10:19,911 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:10:20,706 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-11 00:10:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:20,968 INFO L93 Difference]: Finished difference Result 2483 states and 8261 transitions. [2021-03-11 00:10:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:10:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:20,979 INFO L225 Difference]: With dead ends: 2483 [2021-03-11 00:10:20,979 INFO L226 Difference]: Without dead ends: 2458 [2021-03-11 00:10:20,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 7815.2ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:10:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-03-11 00:10:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1918. [2021-03-11 00:10:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.394887845592071) internal successors, (6508), 1917 states have internal predecessors, (6508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6508 transitions. [2021-03-11 00:10:21,007 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6508 transitions. Word has length 26 [2021-03-11 00:10:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:21,007 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 6508 transitions. [2021-03-11 00:10:21,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6508 transitions. [2021-03-11 00:10:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:21,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:21,010 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:21,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2607 [2021-03-11 00:10:21,210 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 42 times [2021-03-11 00:10:21,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:21,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228962036] [2021-03-11 00:10:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:21,486 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-11 00:10:21,619 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-11 00:10:22,002 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:10:22,458 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:10:22,772 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:10:23,016 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-03-11 00:10:23,241 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-03-11 00:10:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:23,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228962036] [2021-03-11 00:10:23,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501945781] [2021-03-11 00:10:23,246 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 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 [2021-03-11 00:10:23,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:10:23,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:10:23,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:23,999 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:10:24,312 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:10:24,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,497 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:24,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:10:24,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:24,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-03-11 00:10:24,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:24,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:24,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-03-11 00:10:24,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:24,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,769 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:24,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-03-11 00:10:24,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,855 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:24,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-03-11 00:10:24,864 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:24,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,920 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:24,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-03-11 00:10:24,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:24,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:24,984 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:24,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-03-11 00:10:24,989 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,042 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:25,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-03-11 00:10:25,048 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,097 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:25,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-03-11 00:10:25,102 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,155 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:25,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-03-11 00:10:25,161 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,213 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:25,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-03-11 00:10:25,219 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:25,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-03-11 00:10:25,308 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:25,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-03-11 00:10:25,384 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,464 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:10:25,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-03-11 00:10:25,472 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:25,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-03-11 00:10:25,556 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:25,591 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:10:25,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-03-11 00:10:25,596 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:26,099 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:10:26,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:26,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:26,104 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-03-11 00:10:26,739 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:10:27,328 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-11 00:10:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:27,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:27,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:10:27,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153515229] [2021-03-11 00:10:27,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:27,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:27,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:27,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:27,413 INFO L87 Difference]: Start difference. First operand 1918 states and 6508 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:27,782 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-11 00:10:28,360 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:10:28,995 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-11 00:10:29,569 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-03-11 00:10:30,460 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-11 00:10:31,817 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-03-11 00:10:33,372 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:10:34,308 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-11 00:10:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:34,943 INFO L93 Difference]: Finished difference Result 2546 states and 8447 transitions. [2021-03-11 00:10:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:10:34,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:34,953 INFO L225 Difference]: With dead ends: 2546 [2021-03-11 00:10:34,953 INFO L226 Difference]: Without dead ends: 2510 [2021-03-11 00:10:34,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 9446.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:10:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-03-11 00:10:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1939. [2021-03-11 00:10:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.4004127966976263) internal successors, (6590), 1938 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6590 transitions. [2021-03-11 00:10:34,985 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6590 transitions. Word has length 26 [2021-03-11 00:10:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:34,985 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 6590 transitions. [2021-03-11 00:10:34,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6590 transitions. [2021-03-11 00:10:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:34,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:34,989 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:35,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2640 [2021-03-11 00:10:35,189 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 56 times [2021-03-11 00:10:35,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:35,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704380236] [2021-03-11 00:10:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:35,602 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:10:35,785 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-11 00:10:36,001 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-11 00:10:36,246 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-03-11 00:10:36,594 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:10:36,955 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:10:37,289 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:10:37,449 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-03-11 00:10:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:37,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704380236] [2021-03-11 00:10:37,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51757806] [2021-03-11 00:10:37,454 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 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 [2021-03-11 00:10:37,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:10:37,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:10:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:38,116 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:10:38,466 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:10:38,804 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:10:39,240 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:10:40,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:40,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:40,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:40,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:40,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-03-11 00:10:40,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:40,570 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:40,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:40,666 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-03-11 00:10:40,718 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:40,768 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:10:40,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:40,864 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:40,909 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:40,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-11 00:10:40,967 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:40,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:41,017 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:41,071 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:41,118 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-03-11 00:10:41,163 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:41,204 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:41,246 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:10:41,287 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:10:41,327 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:41,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:41,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-03-11 00:10:41,351 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:41,560 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-11 00:10:41,561 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-03-11 00:10:41,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:10:41,567 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:956, output treesize:21 [2021-03-11 00:10:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:41,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:41,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:10:41,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606617840] [2021-03-11 00:10:41,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:41,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:41,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:41,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:41,766 INFO L87 Difference]: Start difference. First operand 1939 states and 6590 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:42,015 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-11 00:10:42,207 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:10:42,432 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:10:42,798 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:10:43,624 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:10:44,142 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:10:44,507 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:10:44,764 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:10:45,522 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:10:46,022 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:10:46,500 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:10:46,919 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-03-11 00:10:47,332 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-11 00:10:47,830 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:10:48,190 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-03-11 00:10:48,506 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:10:48,857 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:10:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:48,918 INFO L93 Difference]: Finished difference Result 2586 states and 8224 transitions. [2021-03-11 00:10:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:10:48,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:48,928 INFO L225 Difference]: With dead ends: 2586 [2021-03-11 00:10:48,928 INFO L226 Difference]: Without dead ends: 2556 [2021-03-11 00:10:48,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 8745.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:10:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-03-11 00:10:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1967. [2021-03-11 00:10:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.399796541200407) internal successors, (6684), 1966 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6684 transitions. [2021-03-11 00:10:48,960 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6684 transitions. Word has length 26 [2021-03-11 00:10:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:48,960 INFO L480 AbstractCegarLoop]: Abstraction has 1967 states and 6684 transitions. [2021-03-11 00:10:48,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6684 transitions. [2021-03-11 00:10:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:48,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:48,963 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:49,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2658,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:49,163 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:49,163 INFO L82 PathProgramCache]: Analyzing trace with hash -401364192, now seen corresponding path program 57 times [2021-03-11 00:10:49,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:49,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821261735] [2021-03-11 00:10:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:49,319 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-11 00:10:49,604 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:10:49,787 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-11 00:10:50,027 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-11 00:10:50,278 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-03-11 00:10:50,652 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:10:51,032 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-11 00:10:51,390 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:10:51,557 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-03-11 00:10:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:51,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821261735] [2021-03-11 00:10:51,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803628118] [2021-03-11 00:10:51,562 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 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 [2021-03-11 00:10:51,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:10:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:51,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:52,340 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:10:52,801 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:10:54,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-03-11 00:10:54,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:10:54,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:10:54,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:10:54,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-03-11 00:10:54,679 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:10:54,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-03-11 00:10:54,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:10:54,885 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-03-11 00:10:54,937 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:54,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:54,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:10:55,003 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:55,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:10:55,061 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:55,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-03-11 00:10:55,132 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:55,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:10:55,202 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:55,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:10:55,257 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:55,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-03-11 00:10:55,308 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:55,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:55,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:55,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:10:55,334 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:55,552 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-11 00:10:55,554 INFO L628 ElimStorePlain]: treesize reduction 16, result has 67.3 percent of original size [2021-03-11 00:10:55,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:10:55,560 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-03-11 00:10:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:55,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:55,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:10:55,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912228190] [2021-03-11 00:10:55,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:55,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:55,773 INFO L87 Difference]: Start difference. First operand 1967 states and 6684 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:56,037 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-11 00:10:56,336 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-03-11 00:10:56,488 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:10:56,690 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:10:56,954 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-11 00:10:57,232 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:10:57,514 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:10:58,025 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:10:58,340 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:10:58,613 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:10:59,183 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-11 00:10:59,765 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:11:00,337 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-11 00:11:00,957 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-11 00:11:01,629 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:11:02,477 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-11 00:11:03,016 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:11:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:03,104 INFO L93 Difference]: Finished difference Result 2698 states and 8750 transitions. [2021-03-11 00:11:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:11:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:03,115 INFO L225 Difference]: With dead ends: 2698 [2021-03-11 00:11:03,115 INFO L226 Difference]: Without dead ends: 2661 [2021-03-11 00:11:03,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 8800.1ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:11:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-03-11 00:11:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1989. [2021-03-11 00:11:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.397887323943662) internal successors, (6755), 1988 states have internal predecessors, (6755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6755 transitions. [2021-03-11 00:11:03,148 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6755 transitions. Word has length 26 [2021-03-11 00:11:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:03,148 INFO L480 AbstractCegarLoop]: Abstraction has 1989 states and 6755 transitions. [2021-03-11 00:11:03,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6755 transitions. [2021-03-11 00:11:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:03,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:03,151 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:03,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2727 [2021-03-11 00:11:03,352 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 58 times [2021-03-11 00:11:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:03,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282670131] [2021-03-11 00:11:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:03,767 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:11:03,940 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-03-11 00:11:04,172 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:11:04,389 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-11 00:11:04,705 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:11:05,120 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-11 00:11:05,336 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-11 00:11:05,531 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-03-11 00:11:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:05,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282670131] [2021-03-11 00:11:05,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509424266] [2021-03-11 00:11:05,536 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 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 [2021-03-11 00:11:05,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:05,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:05,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:06,275 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:11:07,073 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-11 00:11:07,378 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_310, v_prenex_312], 5=[A, v_prenex_314]} [2021-03-11 00:11:07,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:07,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:07,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:11:07,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:08,107 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:11:08,108 INFO L628 ElimStorePlain]: treesize reduction 142, result has 45.2 percent of original size [2021-03-11 00:11:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:08,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:08,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:11:08,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:08,367 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:11:08,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:08,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:08,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:11:08,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:08,622 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:11:08,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:08,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:08,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:08,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:08,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-11 00:11:08,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:08,846 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:11:08,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:08,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:11:08,859 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:31 [2021-03-11 00:11:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:09,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:09,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:11:09,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307254207] [2021-03-11 00:11:09,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:11:09,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:11:09,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:11:09,038 INFO L87 Difference]: Start difference. First operand 1989 states and 6755 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:09,296 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-11 00:11:09,462 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-11 00:11:09,791 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-03-11 00:11:10,449 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2021-03-11 00:11:10,877 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:11:11,120 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:11:11,748 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:11:12,620 WARN L205 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-11 00:11:13,248 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-11 00:11:13,784 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-11 00:11:14,103 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-11 00:11:14,749 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:11:15,734 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-11 00:11:16,715 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-11 00:11:17,440 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:11:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:17,928 INFO L93 Difference]: Finished difference Result 2419 states and 8049 transitions. [2021-03-11 00:11:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:11:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:17,938 INFO L225 Difference]: With dead ends: 2419 [2021-03-11 00:11:17,938 INFO L226 Difference]: Without dead ends: 2388 [2021-03-11 00:11:17,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 10515.4ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:11:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-03-11 00:11:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1985. [2021-03-11 00:11:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 3.391633064516129) internal successors, (6729), 1984 states have internal predecessors, (6729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 6729 transitions. [2021-03-11 00:11:17,962 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 6729 transitions. Word has length 26 [2021-03-11 00:11:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:17,962 INFO L480 AbstractCegarLoop]: Abstraction has 1985 states and 6729 transitions. [2021-03-11 00:11:17,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 6729 transitions. [2021-03-11 00:11:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:17,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:17,965 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:18,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2823,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:18,167 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:18,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 59 times [2021-03-11 00:11:18,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:18,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51919417] [2021-03-11 00:11:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:18,345 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-11 00:11:18,542 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-11 00:11:18,709 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-11 00:11:18,929 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-11 00:11:19,182 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-11 00:11:19,832 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-11 00:11:20,222 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:11:20,422 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-11 00:11:20,602 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-03-11 00:11:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:20,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51919417] [2021-03-11 00:11:20,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345578941] [2021-03-11 00:11:20,606 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 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 [2021-03-11 00:11:20,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:11:20,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:21,419 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:11:21,758 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:11:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:21,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:11:21,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:11:22,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-03-11 00:11:22,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-03-11 00:11:22,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-03-11 00:11:22,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:11:22,133 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:11:22,161 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-03-11 00:11:22,189 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:11:22,216 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:11:22,244 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:11:22,272 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-03-11 00:11:22,304 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:11:22,332 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-11 00:11:22,362 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:11:22,389 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:22,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-11 00:11:22,410 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:22,604 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-03-11 00:11:22,605 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-03-11 00:11:22,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:11:22,610 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:11:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:22,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:22,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:11:22,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115482328] [2021-03-11 00:11:22,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:22,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:22,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:22,844 INFO L87 Difference]: Start difference. First operand 1985 states and 6729 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:23,097 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2021-03-11 00:11:23,297 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-11 00:11:24,192 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-11 00:11:24,473 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-11 00:11:25,214 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-11 00:11:26,387 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-11 00:11:27,045 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:11:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:27,494 INFO L93 Difference]: Finished difference Result 2096 states and 7003 transitions. [2021-03-11 00:11:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:11:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:27,502 INFO L225 Difference]: With dead ends: 2096 [2021-03-11 00:11:27,502 INFO L226 Difference]: Without dead ends: 2081 [2021-03-11 00:11:27,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 6685.3ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:11:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-03-11 00:11:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1995. [2021-03-11 00:11:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.3931795386158474) internal successors, (6766), 1994 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 6766 transitions. [2021-03-11 00:11:27,527 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 6766 transitions. Word has length 26 [2021-03-11 00:11:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:27,528 INFO L480 AbstractCegarLoop]: Abstraction has 1995 states and 6766 transitions. [2021-03-11 00:11:27,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 6766 transitions. [2021-03-11 00:11:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:27,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:27,530 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:27,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2837 [2021-03-11 00:11:27,732 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:27,732 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 43 times [2021-03-11 00:11:27,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:27,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909217545] [2021-03-11 00:11:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:28,297 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-11 00:11:28,785 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-11 00:11:29,234 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-11 00:11:29,666 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:11:30,015 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:11:30,179 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-03-11 00:11:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:30,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909217545] [2021-03-11 00:11:30,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037244088] [2021-03-11 00:11:30,183 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 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 [2021-03-11 00:11:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:30,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:11:30,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:30,615 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:11:30,984 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:11:31,333 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:11:32,828 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:11:33,062 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_318], 3=[v_prenex_316, v_prenex_320]} [2021-03-11 00:11:33,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:33,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:11:33,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:33,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:11:33,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:33,945 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:11:33,946 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-03-11 00:11:33,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:33,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:11:33,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,251 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:11:34,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:34,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:11:34,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,545 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:11:34,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-11 00:11:34,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,819 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:11:34,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:34,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:11:34,828 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-03-11 00:11:35,075 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-11 00:11:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:35,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:35,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:11:35,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895618310] [2021-03-11 00:11:35,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:35,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:35,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:35,191 INFO L87 Difference]: Start difference. First operand 1995 states and 6766 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:35,554 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-03-11 00:11:35,779 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:11:36,288 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:11:36,961 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-11 00:11:37,569 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:11:38,468 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:11:39,081 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-11 00:11:39,868 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:11:41,078 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-03-11 00:11:42,118 WARN L205 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-11 00:11:42,655 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:11:43,053 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:11:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:43,209 INFO L93 Difference]: Finished difference Result 2554 states and 8430 transitions. [2021-03-11 00:11:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:11:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:43,218 INFO L225 Difference]: With dead ends: 2554 [2021-03-11 00:11:43,218 INFO L226 Difference]: Without dead ends: 2539 [2021-03-11 00:11:43,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 10559.1ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:11:43,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-03-11 00:11:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2003. [2021-03-11 00:11:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.3916083916083917) internal successors, (6790), 2002 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6790 transitions. [2021-03-11 00:11:43,248 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6790 transitions. Word has length 26 [2021-03-11 00:11:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:43,248 INFO L480 AbstractCegarLoop]: Abstraction has 2003 states and 6790 transitions. [2021-03-11 00:11:43,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6790 transitions. [2021-03-11 00:11:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:43,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:43,251 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:43,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2851,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:43,451 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 60 times [2021-03-11 00:11:43,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:43,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316553998] [2021-03-11 00:11:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:43,718 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:11:43,984 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:11:44,197 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:11:44,545 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:11:44,893 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:11:45,223 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:11:45,416 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-11 00:11:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:45,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316553998] [2021-03-11 00:11:45,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58252072] [2021-03-11 00:11:45,421 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 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 [2021-03-11 00:11:45,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:11:45,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:45,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:11:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:46,084 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:11:46,415 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:11:46,756 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:11:48,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:11:48,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:11:48,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:11:48,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:11:48,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:11:48,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:11:48,760 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:11:48,806 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:48,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:11:48,925 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:48,979 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:48,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:48,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:11:49,026 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:49,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:11:49,071 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:49,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:49,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:11:49,128 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:49,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:49,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:11:49,164 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:49,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:49,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:49,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:11:49,186 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:49,370 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-11 00:11:49,371 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-11 00:11:49,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:11:49,377 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:11:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:49,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:49,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:11:49,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419747273] [2021-03-11 00:11:49,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:11:49,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:11:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:11:49,493 INFO L87 Difference]: Start difference. First operand 2003 states and 6790 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:49,827 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:11:50,715 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:11:51,033 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:11:51,577 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-11 00:11:52,178 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-11 00:11:52,629 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:11:53,426 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-03-11 00:11:54,408 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:11:55,248 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-11 00:11:55,718 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:11:56,873 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-11 00:11:57,596 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:11:58,118 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:11:58,341 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:11:58,780 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:11:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:58,973 INFO L93 Difference]: Finished difference Result 2567 states and 8303 transitions. [2021-03-11 00:11:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:11:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:58,983 INFO L225 Difference]: With dead ends: 2567 [2021-03-11 00:11:58,983 INFO L226 Difference]: Without dead ends: 2545 [2021-03-11 00:11:58,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 10172.7ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:11:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-03-11 00:11:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2012. [2021-03-11 00:11:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.399801093983093) internal successors, (6837), 2011 states have internal predecessors, (6837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 6837 transitions. [2021-03-11 00:11:59,015 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 6837 transitions. Word has length 26 [2021-03-11 00:11:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:59,015 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 6837 transitions. [2021-03-11 00:11:59,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 6837 transitions. [2021-03-11 00:11:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:59,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:59,017 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:59,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2862 [2021-03-11 00:11:59,220 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:59,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 44 times [2021-03-11 00:11:59,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:59,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375535360] [2021-03-11 00:11:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:59,482 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-11 00:11:59,841 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-11 00:12:00,521 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-11 00:12:00,777 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:12:00,993 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:12:01,225 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:12:01,386 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:12:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375535360] [2021-03-11 00:12:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371762359] [2021-03-11 00:12:01,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:01,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:01,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:12:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:02,006 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:12:02,399 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:12:03,341 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:12:04,581 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-03-11 00:12:04,957 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_328], 2=[A, v_prenex_329]} [2021-03-11 00:12:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:12:04,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,738 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:12:05,740 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:12:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:12:05,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:05,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:05,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:05,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:06,096 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:12:06,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:12:06,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:06,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:06,384 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:12:06,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:06,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:12:06,395 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:12:06,647 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:12:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:06,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:06,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:12:06,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995613595] [2021-03-11 00:12:06,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:06,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:06,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:06,740 INFO L87 Difference]: Start difference. First operand 2012 states and 6837 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:07,047 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:12:07,359 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:12:07,889 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:12:08,565 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-11 00:12:09,202 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:12:10,895 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-11 00:12:11,543 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-11 00:12:12,828 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-11 00:12:13,508 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:12:14,368 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-11 00:12:16,191 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:12:17,542 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-03-11 00:12:19,935 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-03-11 00:12:21,548 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-03-11 00:12:22,406 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:12:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:22,814 INFO L93 Difference]: Finished difference Result 2646 states and 8732 transitions. [2021-03-11 00:12:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:12:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:12:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:22,825 INFO L225 Difference]: With dead ends: 2646 [2021-03-11 00:12:22,825 INFO L226 Difference]: Without dead ends: 2631 [2021-03-11 00:12:22,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 17945.2ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:12:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-03-11 00:12:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2017. [2021-03-11 00:12:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 3.4007936507936507) internal successors, (6856), 2016 states have internal predecessors, (6856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 6856 transitions. [2021-03-11 00:12:22,858 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 6856 transitions. Word has length 26 [2021-03-11 00:12:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:22,858 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 6856 transitions. [2021-03-11 00:12:22,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 6856 transitions. [2021-03-11 00:12:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:22,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:22,861 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:23,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2976 [2021-03-11 00:12:23,062 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:23,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:23,062 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 45 times [2021-03-11 00:12:23,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:23,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874475759] [2021-03-11 00:12:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:23,638 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:12:24,219 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:12:24,909 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-11 00:12:25,540 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-11 00:12:25,721 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-11 00:12:25,896 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:12:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:25,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874475759] [2021-03-11 00:12:25,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250602295] [2021-03-11 00:12:25,901 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 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 [2021-03-11 00:12:25,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:12:25,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:26,520 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:12:27,593 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:12:28,742 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-11 00:12:29,303 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_350, v_prenex_342, v_prenex_337], 6=[v_prenex_339, v_prenex_344, v_prenex_346, v_prenex_348]} [2021-03-11 00:12:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:29,452 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:12:29,454 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:29,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:12:29,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:31,520 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-03-11 00:12:31,522 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-03-11 00:12:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:31,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:31,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:12:31,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:33,402 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 155 DAG size of output: 152 [2021-03-11 00:12:33,404 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-03-11 00:12:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:33,546 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:12:33,548 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:33,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:12:33,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:34,422 WARN L205 SmtUtils]: Spent 865.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-03-11 00:12:34,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:34,557 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:12:34,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:12:34,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:35,408 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-03-11 00:12:35,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:35,537 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:35,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:12:35,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:36,370 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-03-11 00:12:36,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:36,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:36,492 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:12:36,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:12:36,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:37,311 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-11 00:12:37,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:37,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:37,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:12:37,447 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:39,042 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 128 DAG size of output: 123 [2021-03-11 00:12:39,044 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-03-11 00:12:39,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:39,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:39,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:12:39,188 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:39,969 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 00:12:39,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:40,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:12:40,043 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:323 [2021-03-11 00:12:41,575 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-11 00:12:42,127 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-11 00:12:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:42,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:42,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:12:42,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809422316] [2021-03-11 00:12:42,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:42,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:42,275 INFO L87 Difference]: Start difference. First operand 2017 states and 6856 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:42,666 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-11 00:12:43,088 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 20 [2021-03-11 00:12:43,414 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:12:44,283 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-11 00:12:45,310 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2021-03-11 00:12:45,881 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-03-11 00:12:47,458 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-03-11 00:12:48,025 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-11 00:12:48,867 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 40 [2021-03-11 00:12:51,622 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-03-11 00:12:52,924 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-11 00:12:53,518 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:12:54,734 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:12:55,186 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:12:58,927 WARN L205 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-03-11 00:13:01,452 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 126 DAG size of output: 111 [2021-03-11 00:13:04,427 WARN L205 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-03-11 00:13:07,418 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-03-11 00:13:13,491 WARN L205 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2021-03-11 00:13:15,494 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2021-03-11 00:13:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:15,870 INFO L93 Difference]: Finished difference Result 2860 states and 9360 transitions. [2021-03-11 00:13:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:13:15,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:13:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:15,881 INFO L225 Difference]: With dead ends: 2860 [2021-03-11 00:13:15,881 INFO L226 Difference]: Without dead ends: 2845 [2021-03-11 00:13:15,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 36578.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:13:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-03-11 00:13:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2025. [2021-03-11 00:13:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.399703557312253) internal successors, (6881), 2024 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6881 transitions. [2021-03-11 00:13:15,916 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6881 transitions. Word has length 26 [2021-03-11 00:13:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:15,917 INFO L480 AbstractCegarLoop]: Abstraction has 2025 states and 6881 transitions. [2021-03-11 00:13:15,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6881 transitions. [2021-03-11 00:13:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:15,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:15,920 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:16,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2985 [2021-03-11 00:13:16,120 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 61 times [2021-03-11 00:13:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:16,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961703282] [2021-03-11 00:13:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:16,291 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:13:16,474 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:13:16,776 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:13:17,007 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:13:17,385 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:13:17,780 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-11 00:13:18,158 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:13:18,373 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-11 00:13:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:18,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961703282] [2021-03-11 00:13:18,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781858525] [2021-03-11 00:13:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:13:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:13:18,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:18,755 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-11 00:13:18,996 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:13:20,074 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:13:21,332 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:13:22,676 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-03-11 00:13:23,326 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_360], 6=[v_prenex_362, v_prenex_358]} [2021-03-11 00:13:23,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:23,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:23,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:13:23,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:23,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:23,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:23,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-11 00:13:23,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:24,297 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-03-11 00:13:24,298 INFO L628 ElimStorePlain]: treesize reduction 157, result has 47.0 percent of original size [2021-03-11 00:13:24,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:24,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-11 00:13:24,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:24,621 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:13:24,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:24,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:24,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-03-11 00:13:24,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:24,992 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:13:24,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:25,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:25,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:25,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-03-11 00:13:25,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:25,344 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:13:25,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:25,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:13:25,361 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:357, output treesize:33 [2021-03-11 00:13:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:25,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:25,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:13:25,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882768737] [2021-03-11 00:13:25,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:13:25,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:25,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:13:25,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:13:25,563 INFO L87 Difference]: Start difference. First operand 2025 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:26,047 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-11 00:13:26,385 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:26,820 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:13:27,163 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:13:27,933 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-11 00:13:28,428 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:13:29,004 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:29,673 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:13:31,110 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2021-03-11 00:13:31,615 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:13:32,811 WARN L205 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:13:33,546 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:13:33,742 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-11 00:13:35,957 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-03-11 00:13:37,354 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:13:39,819 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2021-03-11 00:13:40,764 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:13:41,571 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-03-11 00:13:41,910 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:13:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:42,240 INFO L93 Difference]: Finished difference Result 2877 states and 9256 transitions. [2021-03-11 00:13:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:13:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:13:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:42,251 INFO L225 Difference]: With dead ends: 2877 [2021-03-11 00:13:42,252 INFO L226 Difference]: Without dead ends: 2847 [2021-03-11 00:13:42,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 18364.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:13:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-03-11 00:13:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2076. [2021-03-11 00:13:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 3.4033734939759035) internal successors, (7062), 2075 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 7062 transitions. [2021-03-11 00:13:42,289 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 7062 transitions. Word has length 26 [2021-03-11 00:13:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:42,289 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 7062 transitions. [2021-03-11 00:13:42,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 7062 transitions. [2021-03-11 00:13:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:42,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:42,293 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:42,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:42,493 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 62 times [2021-03-11 00:13:42,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:42,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645906089] [2021-03-11 00:13:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:42,802 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:13:43,116 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:13:43,379 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:13:43,774 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:13:44,181 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-11 00:13:44,415 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-11 00:13:44,647 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-11 00:13:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:44,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645906089] [2021-03-11 00:13:44,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947085754] [2021-03-11 00:13:44,653 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 [2021-03-11 00:13:44,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:13:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:13:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:45,161 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:45,427 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:13:45,833 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:13:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,292 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:13:46,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:46,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2021-03-11 00:13:46,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:46,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,461 INFO L244 Elim1Store]: Index analysis took 102 ms [2021-03-11 00:13:46,482 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:13:46,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:13:46,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:46,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,705 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2021-03-11 00:13:46,707 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:13:46,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-03-11 00:13:46,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:46,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,843 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:13:46,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:13:46,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,051 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-03-11 00:13:47,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2021-03-11 00:13:47,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:47,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-03-11 00:13:47,330 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:47,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,538 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-03-11 00:13:47,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 30 [2021-03-11 00:13:47,546 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:47,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,671 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:13:47,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:13:47,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,805 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:13:47,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:13:47,812 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:47,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:47,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,003 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-03-11 00:13:48,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-03-11 00:13:48,015 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,133 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:13:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:13:48,139 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:48,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,249 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:13:48,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:13:48,255 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:48,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,444 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-03-11 00:13:48,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 27 [2021-03-11 00:13:48,456 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,652 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:13:48,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-03-11 00:13:48,665 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,775 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:13:48,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:13:48,782 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:48,928 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:13:48,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-03-11 00:13:48,938 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:49,656 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-11 00:13:49,658 INFO L628 ElimStorePlain]: treesize reduction 134, result has 37.7 percent of original size [2021-03-11 00:13:49,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:13:49,663 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:81 [2021-03-11 00:13:50,066 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:13:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:50,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:50,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:13:50,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560398546] [2021-03-11 00:13:50,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:13:50,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:50,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:13:50,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:13:50,338 INFO L87 Difference]: Start difference. First operand 2076 states and 7062 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:50,835 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:13:51,145 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:51,913 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-11 00:13:52,492 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:13:52,853 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:13:53,644 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-03-11 00:13:54,200 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-11 00:13:55,617 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-11 00:13:56,182 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:13:56,639 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:13:57,581 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-11 00:13:58,015 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-11 00:13:58,999 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:13:59,963 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-11 00:14:00,772 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-11 00:14:01,172 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:14:01,345 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 Received shutdown request... [2021-03-11 00:14:02,583 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-03-11 00:14:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:14:02,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-03-11 00:14:02,784 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:14:02,787 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:14:02,788 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:14:02 BasicIcfg [2021-03-11 00:14:02,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:14:02,788 INFO L168 Benchmark]: Toolchain (without parser) took 808868.95 ms. Allocated memory was 329.3 MB in the beginning and 700.4 MB in the end (delta: 371.2 MB). Free memory was 309.0 MB in the beginning and 570.7 MB in the end (delta: -261.7 MB). Peak memory consumption was 112.4 MB. Max. memory is 16.0 GB. [2021-03-11 00:14:02,788 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 329.3 MB. Free memory is still 310.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:14:02,789 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.74 ms. Allocated memory is still 329.3 MB. Free memory was 308.5 MB in the beginning and 307.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:14:02,789 INFO L168 Benchmark]: Boogie Preprocessor took 21.92 ms. Allocated memory is still 329.3 MB. Free memory was 307.0 MB in the beginning and 306.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:14:02,789 INFO L168 Benchmark]: RCFGBuilder took 232.59 ms. Allocated memory is still 329.3 MB. Free memory was 306.0 MB in the beginning and 293.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-11 00:14:02,789 INFO L168 Benchmark]: TraceAbstraction took 808532.77 ms. Allocated memory was 329.3 MB in the beginning and 700.4 MB in the end (delta: 371.2 MB). Free memory was 293.0 MB in the beginning and 570.7 MB in the end (delta: -277.7 MB). Peak memory consumption was 95.7 MB. Max. memory is 16.0 GB. [2021-03-11 00:14:02,789 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 0.11 ms. Allocated memory is still 329.3 MB. Free memory is still 310.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.74 ms. Allocated memory is still 329.3 MB. Free memory was 308.5 MB in the beginning and 307.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.92 ms. Allocated memory is still 329.3 MB. Free memory was 307.0 MB in the beginning and 306.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 232.59 ms. Allocated memory is still 329.3 MB. Free memory was 306.0 MB in the beginning and 293.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 808532.77 ms. Allocated memory was 329.3 MB in the beginning and 700.4 MB in the end (delta: 371.2 MB). Free memory was 293.0 MB in the beginning and 570.7 MB in the end (delta: -277.7 MB). Peak memory consumption was 95.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (2076states) and FLOYD_HOARE automaton (currently 24 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 71 for 1040ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 808368.2ms, OverallIterations: 110, TraceHistogramMax: 2, EmptinessCheckTime: 242.4ms, AutomataDifference: 471653.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4402 SDtfs, 22294 SDslu, 32334 SDs, 0 SdLazy, 60176 SolverSat, 3627 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 55150.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5794 GetRequests, 2007 SyntacticMatches, 111 SemanticMatches, 3675 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42275 ImplicationChecksByTransitivity, 524592.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2076occurred in iteration=109, InterpolantAutomatonStates: 2782, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2491.3ms AutomataMinimizationTime, 109 MinimizatonAttempts, 74937 StatesRemovedByMinimization, 109 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 392.1ms SsaConstructionTime, 1385.6ms SatisfiabilityAnalysisTime, 308100.6ms InterpolantComputationTime, 5454 NumberOfCodeBlocks, 5454 NumberOfCodeBlocksAsserted, 346 NumberOfCheckSat, 5237 ConstructedInterpolants, 100 QuantifiedInterpolants, 165317 SizeOfPredicates, 607 NumberOfNonLiveVariables, 7066 ConjunctsInSsa, 2169 ConjunctsInUnsatCore, 217 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1282 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