/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/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:41:00,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:41:00,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:41:00,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:41:00,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 23:41:00,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 23:41:00,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 23:41:00,504 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 [2021-03-10 23:41:00,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:41:00,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:41:00,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:41:00,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:41:00,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:41:00,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:41:00,539 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:41:00,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:41:00,539 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:41:00,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:41:00,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:41:00,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:41:00,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:41:00,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:41:00,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:41:00,540 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:41:00,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:41:00,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:41:00,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:41:00,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:41:00,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:41:00,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:41:00,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:41:00,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:41:00,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:41:00,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:41:00,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:41:00,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:41:00,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:41:00,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:41:00,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:41:00,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:41:00,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:41:00,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:41:00,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:41:00,887 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:41:00,894 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:41:00,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-03-10 23:41:00,895 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-03-10 23:41:01,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:41:01,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:41:01,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:41:01,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:41:01,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:41:01,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:41:01,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:41:01,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:41:01,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:41:01,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/1) ... [2021-03-10 23:41:01,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:41:01,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:41:01,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:41:01,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:41:01,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (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 [2021-03-10 23:41:01,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:41:01,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:41:01,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:41:01,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:41:01,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:41:01,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:41:01,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:41:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:41:01,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:41:01,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 23:41:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 23:41:01,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 23:41:01,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 23:41:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 23:41:01,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 23:41:01,215 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:41:01,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:41:01,456 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:41:01,457 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:41:01 BoogieIcfgContainer [2021-03-10 23:41:01,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:41:01,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:41:01,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:41:01,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:41:01,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:41:01" (1/2) ... [2021-03-10 23:41:01,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f9cc21 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:41:01, skipping insertion in model container [2021-03-10 23:41:01,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:41:01" (2/2) ... [2021-03-10 23:41:01,463 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-03-10 23:41:01,467 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:41:01,467 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:41:01,470 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:41:01,471 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:41:01,506 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-10 23:41:01,521 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 23:41:01,536 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:41:01,537 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:41:01,537 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:41:01,537 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:41:01,537 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:41:01,537 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:41:01,537 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:41:01,537 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:41:01,545 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-03-10 23:41:01,605 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:41:01,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:01,629 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:01,629 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-03-10 23:41:01,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:01,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537308423] [2021-03-10 23:41:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:01,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537308423] [2021-03-10 23:41:01,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:41:01,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:41:01,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953974110] [2021-03-10 23:41:01,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:41:01,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:41:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:41:01,783 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:01,833 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-03-10 23:41:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:41:01,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 23:41:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:01,857 INFO L225 Difference]: With dead ends: 1236 [2021-03-10 23:41:01,858 INFO L226 Difference]: Without dead ends: 1109 [2021-03-10 23:41:01,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:41:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-03-10 23:41:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-03-10 23:41:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-03-10 23:41:01,976 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-03-10 23:41:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:01,977 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-03-10 23:41:01,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-03-10 23:41:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:41:01,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:01,982 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] [2021-03-10 23:41:01,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:41:01,982 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-03-10 23:41:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:01,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897730932] [2021-03-10 23:41:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:02,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897730932] [2021-03-10 23:41:02,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:41:02,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:41:02,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704600559] [2021-03-10 23:41:02,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:41:02,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:02,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:41:02,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:41:02,069 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:02,119 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-03-10 23:41:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:41:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:41:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:02,130 INFO L225 Difference]: With dead ends: 1524 [2021-03-10 23:41:02,131 INFO L226 Difference]: Without dead ends: 1418 [2021-03-10 23:41:02,132 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:41:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-03-10 23:41:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-03-10 23:41:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-03-10 23:41:02,179 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-03-10 23:41:02,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:02,179 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-03-10 23:41:02,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-03-10 23:41:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:41:02,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:02,184 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] [2021-03-10 23:41:02,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:41:02,185 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-03-10 23:41:02,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:02,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441638593] [2021-03-10 23:41:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:02,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441638593] [2021-03-10 23:41:02,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:41:02,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:41:02,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830812381] [2021-03-10 23:41:02,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:41:02,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:02,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:41:02,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:41:02,271 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:02,353 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-03-10 23:41:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:41:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:41:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:02,367 INFO L225 Difference]: With dead ends: 2017 [2021-03-10 23:41:02,367 INFO L226 Difference]: Without dead ends: 1875 [2021-03-10 23:41:02,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:41:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-03-10 23:41:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-03-10 23:41:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-03-10 23:41:02,426 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-03-10 23:41:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:02,431 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-03-10 23:41:02,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-03-10 23:41:02,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:41:02,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:02,437 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] [2021-03-10 23:41:02,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 23:41:02,437 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-03-10 23:41:02,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:02,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784396537] [2021-03-10 23:41:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:02,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784396537] [2021-03-10 23:41:02,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128780921] [2021-03-10 23:41:02,487 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 [2021-03-10 23:41:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:41:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:02,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:02,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-03-10 23:41:02,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008595614] [2021-03-10 23:41:02,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:41:02,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:02,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:41:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:41:02,729 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:02,864 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-03-10 23:41:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:41:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:41:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:02,876 INFO L225 Difference]: With dead ends: 2308 [2021-03-10 23:41:02,876 INFO L226 Difference]: Without dead ends: 2108 [2021-03-10 23:41:02,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-03-10 23:41:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-03-10 23:41:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-03-10 23:41:02,937 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-03-10 23:41:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:02,937 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-03-10 23:41:02,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-03-10 23:41:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:41:02,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:02,941 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] [2021-03-10 23:41:03,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:03,157 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:03,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1771388146, now seen corresponding path program 1 times [2021-03-10 23:41:03,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:03,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70693508] [2021-03-10 23:41:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:03,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70693508] [2021-03-10 23:41:03,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:41:03,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:41:03,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809306500] [2021-03-10 23:41:03,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:41:03,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:41:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:41:03,223 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:03,309 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-03-10 23:41:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:41:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:41:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:03,320 INFO L225 Difference]: With dead ends: 1950 [2021-03-10 23:41:03,321 INFO L226 Difference]: Without dead ends: 1860 [2021-03-10 23:41:03,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:41:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-03-10 23:41:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-03-10 23:41:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-03-10 23:41:03,376 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-03-10 23:41:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:03,376 INFO L480 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-03-10 23:41:03,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-03-10 23:41:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:41:03,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:03,382 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] [2021-03-10 23:41:03,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 23:41:03,382 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:03,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2115354510, now seen corresponding path program 2 times [2021-03-10 23:41:03,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:03,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582196980] [2021-03-10 23:41:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:03,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582196980] [2021-03-10 23:41:03,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:41:03,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:41:03,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769740299] [2021-03-10 23:41:03,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:41:03,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:03,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:41:03,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:41:03,419 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:03,476 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-03-10 23:41:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:41:03,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:41:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:03,483 INFO L225 Difference]: With dead ends: 1308 [2021-03-10 23:41:03,483 INFO L226 Difference]: Without dead ends: 1308 [2021-03-10 23:41:03,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:41:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-03-10 23:41:03,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-03-10 23:41:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-03-10 23:41:03,519 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-03-10 23:41:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:03,519 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-03-10 23:41:03,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-03-10 23:41:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:41:03,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:03,523 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] [2021-03-10 23:41:03,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 23:41:03,523 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:03,524 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-03-10 23:41:03,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:03,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326485068] [2021-03-10 23:41:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:03,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326485068] [2021-03-10 23:41:03,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:41:03,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:41:03,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371113324] [2021-03-10 23:41:03,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:41:03,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:03,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:41:03,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:41:03,555 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:03,603 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-03-10 23:41:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:41:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:41:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:03,610 INFO L225 Difference]: With dead ends: 1142 [2021-03-10 23:41:03,610 INFO L226 Difference]: Without dead ends: 1120 [2021-03-10 23:41:03,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:41:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-03-10 23:41:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-03-10 23:41:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-03-10 23:41:03,665 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-03-10 23:41:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:03,666 INFO L480 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-03-10 23:41:03,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-03-10 23:41:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:41:03,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:03,669 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, 1, 1, 1] [2021-03-10 23:41:03,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 23:41:03,670 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash -896204878, now seen corresponding path program 1 times [2021-03-10 23:41:03,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:03,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157634418] [2021-03-10 23:41:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:03,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157634418] [2021-03-10 23:41:03,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212579235] [2021-03-10 23:41:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 23:41:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:03,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 23:41:03,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-03-10 23:41:03,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792635679] [2021-03-10 23:41:03,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:41:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:41:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:41:03,821 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:03,846 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-03-10 23:41:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:41:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:41:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:03,854 INFO L225 Difference]: With dead ends: 1344 [2021-03-10 23:41:03,854 INFO L226 Difference]: Without dead ends: 1344 [2021-03-10 23:41:03,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:41:03,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-03-10 23:41:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-03-10 23:41:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-03-10 23:41:03,886 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-03-10 23:41:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:03,888 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-03-10 23:41:03,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-03-10 23:41:03,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:41:03,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:03,895 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, 1, 1, 1] [2021-03-10 23:41:04,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:04,116 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:04,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:04,117 INFO L82 PathProgramCache]: Analyzing trace with hash 591603758, now seen corresponding path program 1 times [2021-03-10 23:41:04,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:04,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783099686] [2021-03-10 23:41:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:04,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783099686] [2021-03-10 23:41:04,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577819591] [2021-03-10 23:41:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:04,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 23:41:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:04,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 23:41:04,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-03-10 23:41:04,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324398969] [2021-03-10 23:41:04,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:41:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:04,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:41:04,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:41:04,240 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:04,262 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-03-10 23:41:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:41:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:41:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:04,285 INFO L225 Difference]: With dead ends: 1608 [2021-03-10 23:41:04,285 INFO L226 Difference]: Without dead ends: 1608 [2021-03-10 23:41:04,285 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:41:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-03-10 23:41:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-03-10 23:41:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-03-10 23:41:04,322 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-03-10 23:41:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:04,323 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-03-10 23:41:04,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-03-10 23:41:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 23:41:04,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:04,326 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, 1, 1, 1, 1, 1] [2021-03-10 23:41:04,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:04,548 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1107902640, now seen corresponding path program 1 times [2021-03-10 23:41:04,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:04,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128309117] [2021-03-10 23:41:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:04,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128309117] [2021-03-10 23:41:04,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278654888] [2021-03-10 23:41:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:04,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:41:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:04,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 23:41:04,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:04,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:04,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:04,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-03-10 23:41:04,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 23:41:04,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:04,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:04,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:04,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-03-10 23:41:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:04,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:04,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 23:41:04,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353150004] [2021-03-10 23:41:04,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:04,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:04,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:04,975 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-03-10 23:41:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:05,162 INFO L93 Difference]: Finished difference Result 2484 states and 9306 transitions. [2021-03-10 23:41:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:41:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-03-10 23:41:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:05,171 INFO L225 Difference]: With dead ends: 2484 [2021-03-10 23:41:05,171 INFO L226 Difference]: Without dead ends: 2405 [2021-03-10 23:41:05,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:41:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-03-10 23:41:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1615. [2021-03-10 23:41:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.7360594795539033) internal successors, (6030), 1614 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 6030 transitions. [2021-03-10 23:41:05,237 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 6030 transitions. Word has length 29 [2021-03-10 23:41:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:05,238 INFO L480 AbstractCegarLoop]: Abstraction has 1615 states and 6030 transitions. [2021-03-10 23:41:05,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-03-10 23:41:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 6030 transitions. [2021-03-10 23:41:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 23:41:05,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:05,244 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, 1, 1, 1, 1, 1] [2021-03-10 23:41:05,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:05,466 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash -769853710, now seen corresponding path program 2 times [2021-03-10 23:41:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:05,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424332044] [2021-03-10 23:41:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:05,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424332044] [2021-03-10 23:41:05,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865131380] [2021-03-10 23:41:05,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:05,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:05,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:05,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:41:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:05,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 23:41:05,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:05,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:05,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:05,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-03-10 23:41:05,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 23:41:05,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:05,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:05,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:05,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-03-10 23:41:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:05,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:05,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 23:41:05,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450436245] [2021-03-10 23:41:05,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:05,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:05,802 INFO L87 Difference]: Start difference. First operand 1615 states and 6030 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-03-10 23:41:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:06,002 INFO L93 Difference]: Finished difference Result 2581 states and 9696 transitions. [2021-03-10 23:41:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:41:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 29 [2021-03-10 23:41:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:06,011 INFO L225 Difference]: With dead ends: 2581 [2021-03-10 23:41:06,012 INFO L226 Difference]: Without dead ends: 2502 [2021-03-10 23:41:06,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:41:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-03-10 23:41:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1741. [2021-03-10 23:41:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 3.7379310344827585) internal successors, (6504), 1740 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 6504 transitions. [2021-03-10 23:41:06,062 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 6504 transitions. Word has length 29 [2021-03-10 23:41:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:06,062 INFO L480 AbstractCegarLoop]: Abstraction has 1741 states and 6504 transitions. [2021-03-10 23:41:06,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-03-10 23:41:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 6504 transitions. [2021-03-10 23:41:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 23:41:06,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:06,068 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, 1, 1, 1, 1, 1] [2021-03-10 23:41:06,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 23:41:06,291 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 3 times [2021-03-10 23:41:06,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:06,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179078263] [2021-03-10 23:41:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:06,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179078263] [2021-03-10 23:41:06,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638175297] [2021-03-10 23:41:06,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:06,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:41:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:06,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:41:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:06,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 23:41:06,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:06,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:06,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:06,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-03-10 23:41:06,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 23:41:06,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:06,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:06,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:06,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-03-10 23:41:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:06,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:06,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 23:41:06,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078323334] [2021-03-10 23:41:06,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:06,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:06,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:06,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:06,618 INFO L87 Difference]: Start difference. First operand 1741 states and 6504 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-03-10 23:41:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:06,809 INFO L93 Difference]: Finished difference Result 3043 states and 11434 transitions. [2021-03-10 23:41:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:41:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 29 [2021-03-10 23:41:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:06,819 INFO L225 Difference]: With dead ends: 3043 [2021-03-10 23:41:06,820 INFO L226 Difference]: Without dead ends: 2964 [2021-03-10 23:41:06,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:41:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-03-10 23:41:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1837. [2021-03-10 23:41:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-03-10 23:41:06,873 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-03-10 23:41:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:06,874 INFO L480 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-03-10 23:41:06,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-03-10 23:41:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-03-10 23:41:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 23:41:06,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:06,879 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, 1, 1, 1, 1, 1] [2021-03-10 23:41:07,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:07,092 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash -949623576, now seen corresponding path program 4 times [2021-03-10 23:41:07,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:07,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128012089] [2021-03-10 23:41:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:07,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128012089] [2021-03-10 23:41:07,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342886] [2021-03-10 23:41:07,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:07,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:41:07,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:41:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:07,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 23:41:07,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:07,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:07,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:07,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-03-10 23:41:07,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 23:41:07,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:07,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:07,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:07,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-03-10 23:41:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:07,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:07,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 23:41:07,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981145034] [2021-03-10 23:41:07,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:07,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:07,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:07,404 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-03-10 23:41:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:07,645 INFO L93 Difference]: Finished difference Result 3105 states and 11701 transitions. [2021-03-10 23:41:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:41:07,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-03-10 23:41:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:07,655 INFO L225 Difference]: With dead ends: 3105 [2021-03-10 23:41:07,655 INFO L226 Difference]: Without dead ends: 3026 [2021-03-10 23:41:07,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:41:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-03-10 23:41:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2051. [2021-03-10 23:41:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-03-10 23:41:07,726 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-03-10 23:41:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:07,727 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-03-10 23:41:07,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-03-10 23:41:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-03-10 23:41:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 23:41:07,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:07,733 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, 1, 1, 1, 1, 1] [2021-03-10 23:41:07,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:07,955 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1467587370, now seen corresponding path program 5 times [2021-03-10 23:41:07,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:07,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101577190] [2021-03-10 23:41:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101577190] [2021-03-10 23:41:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241163277] [2021-03-10 23:41:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:08,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:41:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:08,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 23:41:08,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:08,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:08,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:08,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-03-10 23:41:08,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 23:41:08,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:08,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:08,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:08,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-03-10 23:41:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:08,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:08,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 23:41:08,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813612342] [2021-03-10 23:41:08,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:08,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:08,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:08,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:08,304 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-03-10 23:41:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:08,543 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-03-10 23:41:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:41:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 29 [2021-03-10 23:41:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:08,560 INFO L225 Difference]: With dead ends: 2933 [2021-03-10 23:41:08,560 INFO L226 Difference]: Without dead ends: 2854 [2021-03-10 23:41:08,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:41:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-03-10 23:41:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-03-10 23:41:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-03-10 23:41:08,612 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-03-10 23:41:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:08,612 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-03-10 23:41:08,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-03-10 23:41:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-03-10 23:41:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 23:41:08,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:08,618 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, 1, 1, 1, 1, 1] [2021-03-10 23:41:08,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 23:41:08,838 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:08,838 INFO L82 PathProgramCache]: Analyzing trace with hash -55564736, now seen corresponding path program 6 times [2021-03-10 23:41:08,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:08,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474005216] [2021-03-10 23:41:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:08,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474005216] [2021-03-10 23:41:08,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52473861] [2021-03-10 23:41:08,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:09,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:41:09,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:41:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:09,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 23:41:09,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:09,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:09,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:09,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-03-10 23:41:09,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 23:41:09,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:09,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:09,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:09,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-03-10 23:41:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:09,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:09,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 23:41:09,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367315113] [2021-03-10 23:41:09,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:09,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:09,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:09,186 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-03-10 23:41:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:09,344 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-03-10 23:41:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:41:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 29 [2021-03-10 23:41:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:09,354 INFO L225 Difference]: With dead ends: 2807 [2021-03-10 23:41:09,354 INFO L226 Difference]: Without dead ends: 2728 [2021-03-10 23:41:09,356 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:41:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-03-10 23:41:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-03-10 23:41:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-03-10 23:41:09,406 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-03-10 23:41:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:09,406 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-03-10 23:41:09,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-03-10 23:41:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-03-10 23:41:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:41:09,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:09,412 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, 1, 1, 1, 1, 1] [2021-03-10 23:41:09,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 23:41:09,627 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash -945078094, now seen corresponding path program 7 times [2021-03-10 23:41:09,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:09,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554625452] [2021-03-10 23:41:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:09,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554625452] [2021-03-10 23:41:09,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720990039] [2021-03-10 23:41:09,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:41:09,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:09,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:09,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-03-10 23:41:09,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138381170] [2021-03-10 23:41:09,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:41:09,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:09,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:41:09,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:41:09,803 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:09,876 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-03-10 23:41:09,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:41:09,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 23:41:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:09,888 INFO L225 Difference]: With dead ends: 3393 [2021-03-10 23:41:09,888 INFO L226 Difference]: Without dead ends: 3242 [2021-03-10 23:41:09,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:41:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-03-10 23:41:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-03-10 23:41:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-03-10 23:41:09,963 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-03-10 23:41:09,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:09,963 INFO L480 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-03-10 23:41:09,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-03-10 23:41:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:41:09,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:09,971 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, 1, 1, 1, 1, 1] [2021-03-10 23:41:10,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 23:41:10,192 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:10,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1385088466, now seen corresponding path program 8 times [2021-03-10 23:41:10,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:10,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209243762] [2021-03-10 23:41:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:10,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209243762] [2021-03-10 23:41:10,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113691909] [2021-03-10 23:41:10,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:10,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:10,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:41:10,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:10,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:10,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-03-10 23:41:10,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335735119] [2021-03-10 23:41:10,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:41:10,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:10,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:41:10,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:41:10,332 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:10,397 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-03-10 23:41:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:41:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 23:41:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:10,409 INFO L225 Difference]: With dead ends: 5257 [2021-03-10 23:41:10,409 INFO L226 Difference]: Without dead ends: 5006 [2021-03-10 23:41:10,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:41:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-03-10 23:41:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-03-10 23:41:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-03-10 23:41:10,514 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-03-10 23:41:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:10,515 INFO L480 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-03-10 23:41:10,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-03-10 23:41:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:41:10,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:10,531 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:10,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 23:41:10,747 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1789712274, now seen corresponding path program 9 times [2021-03-10 23:41:10,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:10,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735012885] [2021-03-10 23:41:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:41:10,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735012885] [2021-03-10 23:41:10,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013964249] [2021-03-10 23:41:10,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:10,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:41:10,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:10,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:41:10,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:41:10,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:10,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 23:41:10,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167998304] [2021-03-10 23:41:10,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:41:10,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:10,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:41:10,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:41:10,918 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:11,257 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-03-10 23:41:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:41:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:41:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:11,287 INFO L225 Difference]: With dead ends: 16323 [2021-03-10 23:41:11,287 INFO L226 Difference]: Without dead ends: 13965 [2021-03-10 23:41:11,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:41:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-03-10 23:41:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-03-10 23:41:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-03-10 23:41:11,536 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-03-10 23:41:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:11,536 INFO L480 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-03-10 23:41:11,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-03-10 23:41:11,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:41:11,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:11,554 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:11,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 23:41:11,774 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:11,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:11,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1811384725, now seen corresponding path program 10 times [2021-03-10 23:41:11,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:11,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936767491] [2021-03-10 23:41:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:41:11,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936767491] [2021-03-10 23:41:11,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822611003] [2021-03-10 23:41:11,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:11,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:41:11,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:41:11,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:41:11,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:11,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 23:41:11,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460203511] [2021-03-10 23:41:11,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:41:11,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:11,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:41:11,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:41:11,966 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:12,338 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-03-10 23:41:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:41:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:41:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:12,382 INFO L225 Difference]: With dead ends: 18970 [2021-03-10 23:41:12,382 INFO L226 Difference]: Without dead ends: 18531 [2021-03-10 23:41:12,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:41:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-03-10 23:41:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-03-10 23:41:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-03-10 23:41:12,889 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-03-10 23:41:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:12,889 INFO L480 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-03-10 23:41:12,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-03-10 23:41:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:41:12,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:12,916 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:13,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:13,207 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:13,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1977044948, now seen corresponding path program 11 times [2021-03-10 23:41:13,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:13,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759937072] [2021-03-10 23:41:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:13,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759937072] [2021-03-10 23:41:13,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627641742] [2021-03-10 23:41:13,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:13,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:41:13,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:13,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:41:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:13,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:13,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-03-10 23:41:13,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205167297] [2021-03-10 23:41:13,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:13,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:13,430 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:13,748 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-03-10 23:41:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:41:13,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:41:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:13,794 INFO L225 Difference]: With dead ends: 18432 [2021-03-10 23:41:13,795 INFO L226 Difference]: Without dead ends: 18354 [2021-03-10 23:41:13,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:41:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-03-10 23:41:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-03-10 23:41:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-03-10 23:41:14,128 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-03-10 23:41:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:14,129 INFO L480 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-03-10 23:41:14,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-03-10 23:41:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:41:14,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:14,155 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:14,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:14,377 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:14,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-03-10 23:41:14,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:14,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130626602] [2021-03-10 23:41:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:14,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130626602] [2021-03-10 23:41:14,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371766561] [2021-03-10 23:41:14,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:41:14,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:41:14,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:41:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:14,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:14,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-03-10 23:41:14,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761981757] [2021-03-10 23:41:14,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:14,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:14,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:14,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:14,529 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:14,902 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-03-10 23:41:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:41:14,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:41:14,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:14,943 INFO L225 Difference]: With dead ends: 20371 [2021-03-10 23:41:14,943 INFO L226 Difference]: Without dead ends: 18706 [2021-03-10 23:41:14,943 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:41:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-03-10 23:41:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-03-10 23:41:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-03-10 23:41:15,409 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-03-10 23:41:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:15,409 INFO L480 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-03-10 23:41:15,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-03-10 23:41:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:41:15,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:15,437 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:15,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 23:41:15,643 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:15,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:15,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1475484620, now seen corresponding path program 13 times [2021-03-10 23:41:15,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:15,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502628340] [2021-03-10 23:41:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:15,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502628340] [2021-03-10 23:41:15,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79682957] [2021-03-10 23:41:15,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:41:15,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:15,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:15,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-03-10 23:41:15,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103281152] [2021-03-10 23:41:15,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:15,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:15,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:15,811 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:16,258 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-03-10 23:41:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:41:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:41:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:16,336 INFO L225 Difference]: With dead ends: 29290 [2021-03-10 23:41:16,337 INFO L226 Difference]: Without dead ends: 27668 [2021-03-10 23:41:16,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:41:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-03-10 23:41:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-03-10 23:41:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-03-10 23:41:16,820 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-03-10 23:41:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:16,821 INFO L480 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-03-10 23:41:16,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-03-10 23:41:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:41:16,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:16,853 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:17,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:17,053 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1888062838, now seen corresponding path program 14 times [2021-03-10 23:41:17,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:17,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566490884] [2021-03-10 23:41:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:17,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566490884] [2021-03-10 23:41:17,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425222980] [2021-03-10 23:41:17,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:17,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:17,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:41:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:17,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:17,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-03-10 23:41:17,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158094548] [2021-03-10 23:41:17,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:17,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:17,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:17,202 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:17,693 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-03-10 23:41:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:41:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:41:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:17,871 INFO L225 Difference]: With dead ends: 27112 [2021-03-10 23:41:17,871 INFO L226 Difference]: Without dead ends: 26976 [2021-03-10 23:41:17,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:41:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-03-10 23:41:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-03-10 23:41:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-03-10 23:41:18,337 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-03-10 23:41:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:18,337 INFO L480 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-03-10 23:41:18,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-03-10 23:41:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:41:18,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:18,373 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:18,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 23:41:18,587 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:18,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2054889942, now seen corresponding path program 15 times [2021-03-10 23:41:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:18,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060101612] [2021-03-10 23:41:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060101612] [2021-03-10 23:41:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837790762] [2021-03-10 23:41:18,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:18,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:41:18,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:18,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:41:18,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:18,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:18,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 23:41:18,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366206686] [2021-03-10 23:41:18,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:41:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:18,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:41:18,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:41:18,726 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:19,225 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-03-10 23:41:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:41:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:41:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:19,303 INFO L225 Difference]: With dead ends: 30228 [2021-03-10 23:41:19,303 INFO L226 Difference]: Without dead ends: 30070 [2021-03-10 23:41:19,303 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:41:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-03-10 23:41:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-03-10 23:41:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-03-10 23:41:20,140 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-03-10 23:41:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:20,140 INFO L480 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-03-10 23:41:20,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-03-10 23:41:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:41:20,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:20,228 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:20,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 23:41:20,428 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2024685389, now seen corresponding path program 16 times [2021-03-10 23:41:20,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:20,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121574453] [2021-03-10 23:41:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:41:20,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121574453] [2021-03-10 23:41:20,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323393789] [2021-03-10 23:41:20,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:20,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:41:20,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:41:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:41:20,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:20,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-03-10 23:41:20,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151077959] [2021-03-10 23:41:20,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:20,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:20,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:20,574 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:20,901 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-03-10 23:41:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:41:20,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:41:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:20,972 INFO L225 Difference]: With dead ends: 28338 [2021-03-10 23:41:20,972 INFO L226 Difference]: Without dead ends: 28230 [2021-03-10 23:41:20,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:41:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-03-10 23:41:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-03-10 23:41:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-03-10 23:41:21,544 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-03-10 23:41:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:21,544 INFO L480 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-03-10 23:41:21,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-03-10 23:41:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:41:21,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:21,723 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:21,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 23:41:21,944 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:21,945 INFO L82 PathProgramCache]: Analyzing trace with hash 31444491, now seen corresponding path program 17 times [2021-03-10 23:41:21,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:21,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226863640] [2021-03-10 23:41:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 23:41:21,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226863640] [2021-03-10 23:41:21,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542530812] [2021-03-10 23:41:21,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:22,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:41:22,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:22,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:41:22,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 23:41:22,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:22,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 23:41:22,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967784473] [2021-03-10 23:41:22,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:41:22,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:22,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:41:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:41:22,067 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:22,221 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-03-10 23:41:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:41:22,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 23:41:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:22,302 INFO L225 Difference]: With dead ends: 29898 [2021-03-10 23:41:22,303 INFO L226 Difference]: Without dead ends: 29898 [2021-03-10 23:41:22,303 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:41:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-03-10 23:41:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-03-10 23:41:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-03-10 23:41:22,964 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-03-10 23:41:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:22,964 INFO L480 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-03-10 23:41:22,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-03-10 23:41:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:41:23,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:23,005 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:23,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 23:41:23,206 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash -906169461, now seen corresponding path program 18 times [2021-03-10 23:41:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:23,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977453510] [2021-03-10 23:41:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:41:23,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977453510] [2021-03-10 23:41:23,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227831818] [2021-03-10 23:41:23,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:41:23,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:41:23,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:41:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:41:23,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:23,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 23:41:23,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369136413] [2021-03-10 23:41:23,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:41:23,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:23,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:41:23,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:41:23,335 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:23,796 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-03-10 23:41:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:41:23,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 23:41:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:23,927 INFO L225 Difference]: With dead ends: 37062 [2021-03-10 23:41:23,927 INFO L226 Difference]: Without dead ends: 37062 [2021-03-10 23:41:23,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:41:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-03-10 23:41:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-03-10 23:41:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-03-10 23:41:24,834 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-03-10 23:41:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:24,834 INFO L480 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-03-10 23:41:24,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-03-10 23:41:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:41:24,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:24,901 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:25,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 23:41:25,103 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash -774251319, now seen corresponding path program 19 times [2021-03-10 23:41:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:25,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340027870] [2021-03-10 23:41:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:25,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340027870] [2021-03-10 23:41:25,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494332310] [2021-03-10 23:41:25,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:25,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:41:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:25,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:41:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 23:41:25,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:25,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:25,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:25,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-03-10 23:41:25,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-03-10 23:41:25,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:25,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:25,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:25,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-03-10 23:41:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:25,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:25,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:41:25,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40401728] [2021-03-10 23:41:25,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:41:25,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:25,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:41:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:41:25,893 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:27,895 INFO L93 Difference]: Finished difference Result 68330 states and 281299 transitions. [2021-03-10 23:41:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:41:27,896 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:41:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:28,152 INFO L225 Difference]: With dead ends: 68330 [2021-03-10 23:41:28,152 INFO L226 Difference]: Without dead ends: 68275 [2021-03-10 23:41:28,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 855.7ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:41:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68275 states. [2021-03-10 23:41:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68275 to 35332. [2021-03-10 23:41:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35332 states, 35331 states have (on average 4.143075486117008) internal successors, (146379), 35331 states have internal predecessors, (146379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35332 states to 35332 states and 146379 transitions. [2021-03-10 23:41:29,394 INFO L78 Accepts]: Start accepts. Automaton has 35332 states and 146379 transitions. Word has length 39 [2021-03-10 23:41:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:29,394 INFO L480 AbstractCegarLoop]: Abstraction has 35332 states and 146379 transitions. [2021-03-10 23:41:29,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 35332 states and 146379 transitions. [2021-03-10 23:41:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:41:29,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:29,462 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:29,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:29,664 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1160268155, now seen corresponding path program 20 times [2021-03-10 23:41:29,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:29,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914978114] [2021-03-10 23:41:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:30,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914978114] [2021-03-10 23:41:30,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713480691] [2021-03-10 23:41:30,009 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 [2021-03-10 23:41:30,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:30,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:41:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:30,269 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:41:30,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 23:41:30,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:30,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:30,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:30,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-03-10 23:41:30,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:41:30,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:30,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:30,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:30,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:41:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:30,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:30,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:41:30,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619980271] [2021-03-10 23:41:30,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:41:30,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:30,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:41:30,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:41:30,455 INFO L87 Difference]: Start difference. First operand 35332 states and 146379 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:31,198 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:41:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:32,236 INFO L93 Difference]: Finished difference Result 63146 states and 258446 transitions. [2021-03-10 23:41:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:41:32,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:41:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:32,416 INFO L225 Difference]: With dead ends: 63146 [2021-03-10 23:41:32,416 INFO L226 Difference]: Without dead ends: 62930 [2021-03-10 23:41:32,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1447.2ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:41:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62930 states. [2021-03-10 23:41:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62930 to 35439. [2021-03-10 23:41:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35439 states, 35438 states have (on average 4.145691066087251) internal successors, (146915), 35438 states have internal predecessors, (146915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35439 states to 35439 states and 146915 transitions. [2021-03-10 23:41:33,740 INFO L78 Accepts]: Start accepts. Automaton has 35439 states and 146915 transitions. Word has length 39 [2021-03-10 23:41:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:33,740 INFO L480 AbstractCegarLoop]: Abstraction has 35439 states and 146915 transitions. [2021-03-10 23:41:33,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35439 states and 146915 transitions. [2021-03-10 23:41:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:41:33,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:33,810 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:34,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 23:41:34,010 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:34,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1763377011, now seen corresponding path program 21 times [2021-03-10 23:41:34,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:34,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433336860] [2021-03-10 23:41:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:34,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433336860] [2021-03-10 23:41:34,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596285555] [2021-03-10 23:41:34,485 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 [2021-03-10 23:41:34,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:41:34,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:34,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:41:34,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:34,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:34,778 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 44 [2021-03-10 23:41:34,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:34,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:34,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:34,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:45 [2021-03-10 23:41:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:41:35,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:35,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:35,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:35,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-03-10 23:41:35,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:35,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:41:35,051 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:41:35,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:35,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:41:35,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-03-10 23:41:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:35,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:35,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-03-10 23:41:35,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519846911] [2021-03-10 23:41:35,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:41:35,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:35,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:41:35,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:41:35,132 INFO L87 Difference]: Start difference. First operand 35439 states and 146915 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:37,787 INFO L93 Difference]: Finished difference Result 64599 states and 264126 transitions. [2021-03-10 23:41:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:41:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:41:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:37,963 INFO L225 Difference]: With dead ends: 64599 [2021-03-10 23:41:37,963 INFO L226 Difference]: Without dead ends: 64378 [2021-03-10 23:41:37,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2107.4ms TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:41:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64378 states. [2021-03-10 23:41:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64378 to 35778. [2021-03-10 23:41:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35778 states, 35777 states have (on average 4.14014590379294) internal successors, (148122), 35777 states have internal predecessors, (148122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35778 states to 35778 states and 148122 transitions. [2021-03-10 23:41:39,014 INFO L78 Accepts]: Start accepts. Automaton has 35778 states and 148122 transitions. Word has length 39 [2021-03-10 23:41:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:39,014 INFO L480 AbstractCegarLoop]: Abstraction has 35778 states and 148122 transitions. [2021-03-10 23:41:39,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 35778 states and 148122 transitions. [2021-03-10 23:41:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:41:39,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:39,081 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:39,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:39,282 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1572423621, now seen corresponding path program 22 times [2021-03-10 23:41:39,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:39,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778758808] [2021-03-10 23:41:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:40,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778758808] [2021-03-10 23:41:40,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812886124] [2021-03-10 23:41:40,052 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 [2021-03-10 23:41:40,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:41:40,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:41:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:40,281 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:41:40,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-03-10 23:41:40,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:40,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:40,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:40,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-03-10 23:41:40,404 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 35 treesize of output 27 [2021-03-10 23:41:40,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:40,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:40,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:40,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:41:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:40,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:40,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:41:40,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011776360] [2021-03-10 23:41:40,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:41:40,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:41:40,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:41:40,461 INFO L87 Difference]: Start difference. First operand 35778 states and 148122 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:42,482 INFO L93 Difference]: Finished difference Result 77057 states and 313105 transitions. [2021-03-10 23:41:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:41:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:41:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:42,710 INFO L225 Difference]: With dead ends: 77057 [2021-03-10 23:41:42,711 INFO L226 Difference]: Without dead ends: 76873 [2021-03-10 23:41:42,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1285.5ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:41:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76873 states. [2021-03-10 23:41:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76873 to 35467. [2021-03-10 23:41:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35467 states, 35466 states have (on average 4.145068516325495) internal successors, (147009), 35466 states have internal predecessors, (147009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35467 states to 35467 states and 147009 transitions. [2021-03-10 23:41:43,911 INFO L78 Accepts]: Start accepts. Automaton has 35467 states and 147009 transitions. Word has length 39 [2021-03-10 23:41:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:43,911 INFO L480 AbstractCegarLoop]: Abstraction has 35467 states and 147009 transitions. [2021-03-10 23:41:43,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 35467 states and 147009 transitions. [2021-03-10 23:41:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:41:43,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:43,974 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:44,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 23:41:44,187 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:44,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1303937869, now seen corresponding path program 23 times [2021-03-10 23:41:44,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:44,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554643925] [2021-03-10 23:41:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:44,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554643925] [2021-03-10 23:41:44,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516527768] [2021-03-10 23:41:44,549 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 [2021-03-10 23:41:44,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:41:44,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:44,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:41:44,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:44,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:44,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:44,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:44,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 50 [2021-03-10 23:41:44,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:41:44,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:45,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:41:45,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:47 [2021-03-10 23:41:45,327 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:41:45,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:45,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:45,377 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 50 [2021-03-10 23:41:45,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:41:45,415 INFO L628 ElimStorePlain]: treesize reduction 35, result has 50.0 percent of original size [2021-03-10 23:41:45,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:41:45,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:45 [2021-03-10 23:41:45,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:45,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-03-10 23:41:45,689 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:41:45,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:45,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:41:45,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:18 [2021-03-10 23:41:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:45,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:45,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:41:45,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935122359] [2021-03-10 23:41:45,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:41:45,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:45,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:41:45,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:41:45,769 INFO L87 Difference]: Start difference. First operand 35467 states and 147009 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:49,299 INFO L93 Difference]: Finished difference Result 62612 states and 255498 transitions. [2021-03-10 23:41:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:41:49,299 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:41:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:49,473 INFO L225 Difference]: With dead ends: 62612 [2021-03-10 23:41:49,474 INFO L226 Difference]: Without dead ends: 62518 [2021-03-10 23:41:49,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2388.2ms TimeCoverageRelationStatistics Valid=527, Invalid=3379, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:41:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62518 states. [2021-03-10 23:41:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62518 to 36181. [2021-03-10 23:41:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36181 states, 36180 states have (on average 4.1457435046987285) internal successors, (149993), 36180 states have internal predecessors, (149993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36181 states to 36181 states and 149993 transitions. [2021-03-10 23:41:50,495 INFO L78 Accepts]: Start accepts. Automaton has 36181 states and 149993 transitions. Word has length 39 [2021-03-10 23:41:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:50,495 INFO L480 AbstractCegarLoop]: Abstraction has 36181 states and 149993 transitions. [2021-03-10 23:41:50,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 36181 states and 149993 transitions. [2021-03-10 23:41:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:41:50,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:50,561 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:50,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 23:41:50,763 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 495020509, now seen corresponding path program 24 times [2021-03-10 23:41:50,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:50,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479316712] [2021-03-10 23:41:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:51,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479316712] [2021-03-10 23:41:51,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214411728] [2021-03-10 23:41:51,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:41:51,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:41:51,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:51,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:41:51,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:51,351 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:41:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 23:41:51,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:51,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:51,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:51,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-03-10 23:41:51,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-03-10 23:41:51,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:51,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:51,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:51,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:15 [2021-03-10 23:41:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:51,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:51,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:41:51,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202845452] [2021-03-10 23:41:51,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:41:51,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:41:51,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:41:51,759 INFO L87 Difference]: Start difference. First operand 36181 states and 149993 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:53,290 INFO L93 Difference]: Finished difference Result 69332 states and 285428 transitions. [2021-03-10 23:41:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:41:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:41:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:53,488 INFO L225 Difference]: With dead ends: 69332 [2021-03-10 23:41:53,488 INFO L226 Difference]: Without dead ends: 69277 [2021-03-10 23:41:53,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1011.1ms TimeCoverageRelationStatistics Valid=301, Invalid=1339, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:41:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69277 states. [2021-03-10 23:41:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69277 to 35741. [2021-03-10 23:41:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35741 states, 35740 states have (on average 4.143956351426972) internal successors, (148105), 35740 states have internal predecessors, (148105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35741 states to 35741 states and 148105 transitions. [2021-03-10 23:41:54,907 INFO L78 Accepts]: Start accepts. Automaton has 35741 states and 148105 transitions. Word has length 39 [2021-03-10 23:41:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:54,907 INFO L480 AbstractCegarLoop]: Abstraction has 35741 states and 148105 transitions. [2021-03-10 23:41:54,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 35741 states and 148105 transitions. [2021-03-10 23:41:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:41:54,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:54,994 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:55,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-10 23:41:55,195 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash 630581605, now seen corresponding path program 25 times [2021-03-10 23:41:55,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:55,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672552767] [2021-03-10 23:41:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:55,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672552767] [2021-03-10 23:41:55,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191521279] [2021-03-10 23:41:55,588 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 [2021-03-10 23:41:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:55,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:41:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:55,828 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:41:55,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 23:41:55,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:55,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:55,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:55,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-03-10 23:41:55,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:41:55,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:55,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:55,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:55,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:41:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:55,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:55,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:41:55,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474421468] [2021-03-10 23:41:55,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:41:55,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:41:55,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:41:55,966 INFO L87 Difference]: Start difference. First operand 35741 states and 148105 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:58,151 INFO L93 Difference]: Finished difference Result 63431 states and 259711 transitions. [2021-03-10 23:41:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:41:58,151 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:41:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:58,331 INFO L225 Difference]: With dead ends: 63431 [2021-03-10 23:41:58,331 INFO L226 Difference]: Without dead ends: 63215 [2021-03-10 23:41:58,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1240.4ms TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:41:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63215 states. [2021-03-10 23:41:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63215 to 35591. [2021-03-10 23:41:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35591 states, 35590 states have (on average 4.1449002528800225) internal successors, (147517), 35590 states have internal predecessors, (147517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35591 states to 35591 states and 147517 transitions. [2021-03-10 23:41:59,407 INFO L78 Accepts]: Start accepts. Automaton has 35591 states and 147517 transitions. Word has length 39 [2021-03-10 23:41:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:59,407 INFO L480 AbstractCegarLoop]: Abstraction has 35591 states and 147517 transitions. [2021-03-10 23:41:59,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 35591 states and 147517 transitions. [2021-03-10 23:41:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:41:59,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:59,476 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:59,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:59,679 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1833798575, now seen corresponding path program 26 times [2021-03-10 23:41:59,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:59,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677437334] [2021-03-10 23:41:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:00,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677437334] [2021-03-10 23:42:00,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321188375] [2021-03-10 23:42:00,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:42:00,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:42:00,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:00,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:42:00,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:00,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:42:00,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:00,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:00,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:00,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-03-10 23:42:00,365 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:42:00,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-03-10 23:42:00,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:00,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:00,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:00,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-03-10 23:42:00,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:00,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:42:00,459 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:00,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:00,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:00,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-03-10 23:42:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:00,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:00,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-10 23:42:00,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313401119] [2021-03-10 23:42:00,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:42:00,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:00,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:42:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:42:00,523 INFO L87 Difference]: Start difference. First operand 35591 states and 147517 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:02,678 INFO L93 Difference]: Finished difference Result 81055 states and 333972 transitions. [2021-03-10 23:42:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:42:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:02,917 INFO L225 Difference]: With dead ends: 81055 [2021-03-10 23:42:02,917 INFO L226 Difference]: Without dead ends: 81000 [2021-03-10 23:42:02,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1259.4ms TimeCoverageRelationStatistics Valid=402, Invalid=2148, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:42:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81000 states. [2021-03-10 23:42:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81000 to 36137. [2021-03-10 23:42:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36137 states, 36136 states have (on average 4.146695815806951) internal successors, (149845), 36136 states have internal predecessors, (149845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36137 states to 36137 states and 149845 transitions. [2021-03-10 23:42:04,488 INFO L78 Accepts]: Start accepts. Automaton has 36137 states and 149845 transitions. Word has length 39 [2021-03-10 23:42:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:04,488 INFO L480 AbstractCegarLoop]: Abstraction has 36137 states and 149845 transitions. [2021-03-10 23:42:04,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 36137 states and 149845 transitions. [2021-03-10 23:42:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:04,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:04,585 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:04,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 23:42:04,785 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:04,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1196210545, now seen corresponding path program 27 times [2021-03-10 23:42:04,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:04,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331823066] [2021-03-10 23:42:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:05,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331823066] [2021-03-10 23:42:05,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543230669] [2021-03-10 23:42:05,139 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 [2021-03-10 23:42:05,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:42:05,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:05,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:42:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:05,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:05,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 47 [2021-03-10 23:42:05,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:05,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:05,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:05,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:66 [2021-03-10 23:42:05,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:05,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2021-03-10 23:42:05,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:05,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:05,724 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-03-10 23:42:05,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:05,736 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-10 23:42:05,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 26 [2021-03-10 23:42:05,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:05,804 INFO L628 ElimStorePlain]: treesize reduction 16, result has 86.3 percent of original size [2021-03-10 23:42:05,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:42:05,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:159, output treesize:142 [2021-03-10 23:42:05,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:05,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:42:05,959 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:05,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:05,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-03-10 23:42:05,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:06,016 INFO L628 ElimStorePlain]: treesize reduction 10, result has 78.3 percent of original size [2021-03-10 23:42:06,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:06,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:37 [2021-03-10 23:42:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:06,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:06,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:42:06,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331506153] [2021-03-10 23:42:06,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:42:06,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:42:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:42:06,081 INFO L87 Difference]: Start difference. First operand 36137 states and 149845 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:07,400 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:42:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:10,680 INFO L93 Difference]: Finished difference Result 82555 states and 337470 transitions. [2021-03-10 23:42:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:42:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:10,910 INFO L225 Difference]: With dead ends: 82555 [2021-03-10 23:42:10,911 INFO L226 Difference]: Without dead ends: 82461 [2021-03-10 23:42:10,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 3344.5ms TimeCoverageRelationStatistics Valid=690, Invalid=4712, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:42:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82461 states. [2021-03-10 23:42:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82461 to 36533. [2021-03-10 23:42:12,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36533 states, 36532 states have (on average 4.145844738859083) internal successors, (151456), 36532 states have internal predecessors, (151456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36533 states to 36533 states and 151456 transitions. [2021-03-10 23:42:12,141 INFO L78 Accepts]: Start accepts. Automaton has 36533 states and 151456 transitions. Word has length 39 [2021-03-10 23:42:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:12,141 INFO L480 AbstractCegarLoop]: Abstraction has 36533 states and 151456 transitions. [2021-03-10 23:42:12,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 36533 states and 151456 transitions. [2021-03-10 23:42:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:12,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:12,208 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:12,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:12,411 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1679763727, now seen corresponding path program 28 times [2021-03-10 23:42:12,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:12,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156355539] [2021-03-10 23:42:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:12,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156355539] [2021-03-10 23:42:12,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447128241] [2021-03-10 23:42:12,783 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 [2021-03-10 23:42:12,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:42:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:12,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:42:12,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:13,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:42:13,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:13,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:13,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:13,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-03-10 23:42:13,135 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:42:13,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:42:13,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:13,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:13,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:13,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:42:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:13,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:13,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-03-10 23:42:13,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379172964] [2021-03-10 23:42:13,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:42:13,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:13,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:42:13,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:42:13,186 INFO L87 Difference]: Start difference. First operand 36533 states and 151456 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:15,080 INFO L93 Difference]: Finished difference Result 83184 states and 342909 transitions. [2021-03-10 23:42:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:42:15,081 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:15,326 INFO L225 Difference]: With dead ends: 83184 [2021-03-10 23:42:15,326 INFO L226 Difference]: Without dead ends: 83129 [2021-03-10 23:42:15,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1028.7ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:42:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83129 states. [2021-03-10 23:42:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83129 to 37211. [2021-03-10 23:42:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37211 states, 37210 states have (on average 4.151034668099973) internal successors, (154460), 37210 states have internal predecessors, (154460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37211 states to 37211 states and 154460 transitions. [2021-03-10 23:42:16,675 INFO L78 Accepts]: Start accepts. Automaton has 37211 states and 154460 transitions. Word has length 39 [2021-03-10 23:42:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:16,675 INFO L480 AbstractCegarLoop]: Abstraction has 37211 states and 154460 transitions. [2021-03-10 23:42:16,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 37211 states and 154460 transitions. [2021-03-10 23:42:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:16,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:16,743 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:16,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 23:42:16,944 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:16,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1805400427, now seen corresponding path program 29 times [2021-03-10 23:42:16,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:16,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888941982] [2021-03-10 23:42:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:17,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888941982] [2021-03-10 23:42:17,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800026599] [2021-03-10 23:42:17,680 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 [2021-03-10 23:42:17,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:42:17,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:17,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:42:17,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:17,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 31 [2021-03-10 23:42:17,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:17,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:17,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:17,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-03-10 23:42:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:18,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:18,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:18,106 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 57 [2021-03-10 23:42:18,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:42:18,139 INFO L628 ElimStorePlain]: treesize reduction 22, result has 58.5 percent of original size [2021-03-10 23:42:18,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:18,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:32 [2021-03-10 23:42:18,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:18,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:42:18,202 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:18,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:18,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:18,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-03-10 23:42:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:18,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:18,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:42:18,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100820340] [2021-03-10 23:42:18,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:42:18,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:42:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:42:18,329 INFO L87 Difference]: Start difference. First operand 37211 states and 154460 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:19,334 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-10 23:42:20,391 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-03-10 23:42:21,359 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-03-10 23:42:22,547 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-10 23:42:24,261 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-03-10 23:42:25,079 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-03-10 23:42:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:27,141 INFO L93 Difference]: Finished difference Result 110845 states and 446568 transitions. [2021-03-10 23:42:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-03-10 23:42:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:27,513 INFO L225 Difference]: With dead ends: 110845 [2021-03-10 23:42:27,513 INFO L226 Difference]: Without dead ends: 110680 [2021-03-10 23:42:27,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 6866.4ms TimeCoverageRelationStatistics Valid=1977, Invalid=9579, Unknown=0, NotChecked=0, Total=11556 [2021-03-10 23:42:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110680 states. [2021-03-10 23:42:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110680 to 37216. [2021-03-10 23:42:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37216 states, 37215 states have (on average 4.151847373370953) internal successors, (154511), 37215 states have internal predecessors, (154511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37216 states to 37216 states and 154511 transitions. [2021-03-10 23:42:29,058 INFO L78 Accepts]: Start accepts. Automaton has 37216 states and 154511 transitions. Word has length 39 [2021-03-10 23:42:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:29,058 INFO L480 AbstractCegarLoop]: Abstraction has 37216 states and 154511 transitions. [2021-03-10 23:42:29,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37216 states and 154511 transitions. [2021-03-10 23:42:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:29,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:29,127 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:29,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:42:29,331 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash -702447437, now seen corresponding path program 30 times [2021-03-10 23:42:29,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:29,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994753460] [2021-03-10 23:42:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:29,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994753460] [2021-03-10 23:42:29,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377825574] [2021-03-10 23:42:29,667 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 [2021-03-10 23:42:29,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:42:29,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:29,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:42:29,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:30,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:30,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:42:30,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:30,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:30,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:42:30,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:33 [2021-03-10 23:42:30,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:30,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-03-10 23:42:30,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:30,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:30,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:30,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:31 [2021-03-10 23:42:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:30,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:30,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 23:42:30,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834384511] [2021-03-10 23:42:30,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:42:30,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:30,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:42:30,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:42:30,848 INFO L87 Difference]: Start difference. First operand 37216 states and 154511 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:33,741 INFO L93 Difference]: Finished difference Result 63252 states and 258125 transitions. [2021-03-10 23:42:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:42:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:33,932 INFO L225 Difference]: With dead ends: 63252 [2021-03-10 23:42:33,932 INFO L226 Difference]: Without dead ends: 63049 [2021-03-10 23:42:33,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1913.8ms TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:42:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63049 states. [2021-03-10 23:42:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63049 to 37668. [2021-03-10 23:42:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37668 states, 37667 states have (on average 4.144954469429474) internal successors, (156128), 37667 states have internal predecessors, (156128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37668 states to 37668 states and 156128 transitions. [2021-03-10 23:42:35,097 INFO L78 Accepts]: Start accepts. Automaton has 37668 states and 156128 transitions. Word has length 39 [2021-03-10 23:42:35,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:35,097 INFO L480 AbstractCegarLoop]: Abstraction has 37668 states and 156128 transitions. [2021-03-10 23:42:35,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 37668 states and 156128 transitions. [2021-03-10 23:42:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:35,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:35,167 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:35,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:35,367 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:35,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:35,367 INFO L82 PathProgramCache]: Analyzing trace with hash -63479867, now seen corresponding path program 31 times [2021-03-10 23:42:35,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:35,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443312545] [2021-03-10 23:42:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:35,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443312545] [2021-03-10 23:42:35,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508838296] [2021-03-10 23:42:35,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:35,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:42:35,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:35,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:42:35,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:35,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:35,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:35,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-03-10 23:42:36,040 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:42:36,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:42:36,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:36,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:36,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:36,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:42:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:36,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:36,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:42:36,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830144463] [2021-03-10 23:42:36,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:42:36,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:36,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:42:36,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:42:36,095 INFO L87 Difference]: Start difference. First operand 37668 states and 156128 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:38,056 INFO L93 Difference]: Finished difference Result 87857 states and 359048 transitions. [2021-03-10 23:42:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:42:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:38,313 INFO L225 Difference]: With dead ends: 87857 [2021-03-10 23:42:38,313 INFO L226 Difference]: Without dead ends: 87802 [2021-03-10 23:42:38,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1091.6ms TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:42:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87802 states. [2021-03-10 23:42:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87802 to 37186. [2021-03-10 23:42:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37186 states, 37185 states have (on average 4.145434987226032) internal successors, (154148), 37185 states have internal predecessors, (154148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37186 states to 37186 states and 154148 transitions. [2021-03-10 23:42:39,674 INFO L78 Accepts]: Start accepts. Automaton has 37186 states and 154148 transitions. Word has length 39 [2021-03-10 23:42:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:39,674 INFO L480 AbstractCegarLoop]: Abstraction has 37186 states and 154148 transitions. [2021-03-10 23:42:39,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 37186 states and 154148 transitions. [2021-03-10 23:42:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:39,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:39,743 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:39,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 23:42:39,943 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:39,943 INFO L82 PathProgramCache]: Analyzing trace with hash -202749415, now seen corresponding path program 32 times [2021-03-10 23:42:39,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:39,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308035740] [2021-03-10 23:42:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:40,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308035740] [2021-03-10 23:42:40,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547490443] [2021-03-10 23:42:40,387 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 [2021-03-10 23:42:40,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:42:40,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:40,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:42:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:40,673 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:42:40,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-03-10 23:42:40,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:40,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:40,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:40,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-03-10 23:42:41,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:42:41,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:41,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:41,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:41,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:42:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:41,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:41,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:42:41,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121450896] [2021-03-10 23:42:41,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:42:41,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:42:41,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:42:41,100 INFO L87 Difference]: Start difference. First operand 37186 states and 154148 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:42,798 INFO L93 Difference]: Finished difference Result 65528 states and 267987 transitions. [2021-03-10 23:42:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:42:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:42,980 INFO L225 Difference]: With dead ends: 65528 [2021-03-10 23:42:42,980 INFO L226 Difference]: Without dead ends: 65280 [2021-03-10 23:42:42,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1543.6ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:42:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65280 states. [2021-03-10 23:42:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65280 to 37372. [2021-03-10 23:42:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37372 states, 37371 states have (on average 4.143533756121056) internal successors, (154848), 37371 states have internal predecessors, (154848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37372 states to 37372 states and 154848 transitions. [2021-03-10 23:42:44,089 INFO L78 Accepts]: Start accepts. Automaton has 37372 states and 154848 transitions. Word has length 39 [2021-03-10 23:42:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:44,089 INFO L480 AbstractCegarLoop]: Abstraction has 37372 states and 154848 transitions. [2021-03-10 23:42:44,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 37372 states and 154848 transitions. [2021-03-10 23:42:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:44,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:44,155 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:44,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:44,355 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1814336637, now seen corresponding path program 33 times [2021-03-10 23:42:44,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:44,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420493094] [2021-03-10 23:42:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:44,684 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:42:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:45,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420493094] [2021-03-10 23:42:45,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496039336] [2021-03-10 23:42:45,027 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 [2021-03-10 23:42:45,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:42:45,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:42:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:45,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:45,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:45,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 23:42:45,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:45,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:45,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:42:45,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:41 [2021-03-10 23:42:45,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:45,693 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 25 [2021-03-10 23:42:45,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:45,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:45,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:45,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-03-10 23:42:45,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:45,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:42:45,782 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:45,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:45,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:45,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-03-10 23:42:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:45,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:45,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 23:42:45,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829307939] [2021-03-10 23:42:45,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:42:45,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:45,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:42:45,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:42:45,869 INFO L87 Difference]: Start difference. First operand 37372 states and 154848 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:49,817 INFO L93 Difference]: Finished difference Result 80057 states and 324656 transitions. [2021-03-10 23:42:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:42:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:50,044 INFO L225 Difference]: With dead ends: 80057 [2021-03-10 23:42:50,044 INFO L226 Difference]: Without dead ends: 79722 [2021-03-10 23:42:50,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 3348.3ms TimeCoverageRelationStatistics Valid=873, Invalid=4383, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:42:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79722 states. [2021-03-10 23:42:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79722 to 37394. [2021-03-10 23:42:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37394 states, 37393 states have (on average 4.142700505442195) internal successors, (154908), 37393 states have internal predecessors, (154908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37394 states to 37394 states and 154908 transitions. [2021-03-10 23:42:51,302 INFO L78 Accepts]: Start accepts. Automaton has 37394 states and 154908 transitions. Word has length 39 [2021-03-10 23:42:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:51,302 INFO L480 AbstractCegarLoop]: Abstraction has 37394 states and 154908 transitions. [2021-03-10 23:42:51,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 37394 states and 154908 transitions. [2021-03-10 23:42:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:51,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:51,380 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:51,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:51,581 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:51,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2018257383, now seen corresponding path program 34 times [2021-03-10 23:42:51,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:51,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143851988] [2021-03-10 23:42:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:52,229 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-03-10 23:42:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:52,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143851988] [2021-03-10 23:42:52,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432559948] [2021-03-10 23:42:52,277 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 [2021-03-10 23:42:52,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:42:52,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:42:52,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:52,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:42:52,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:52,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:52,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:52,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:42:52,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:42:52,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:42:52,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:52,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:52,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:52,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:42:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:52,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:52,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:42:52,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258519573] [2021-03-10 23:42:52,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:42:52,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:42:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:42:52,667 INFO L87 Difference]: Start difference. First operand 37394 states and 154908 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:54,336 INFO L93 Difference]: Finished difference Result 70216 states and 286878 transitions. [2021-03-10 23:42:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:42:54,337 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:42:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:54,807 INFO L225 Difference]: With dead ends: 70216 [2021-03-10 23:42:54,808 INFO L226 Difference]: Without dead ends: 70126 [2021-03-10 23:42:54,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1426.9ms TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:42:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70126 states. [2021-03-10 23:42:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70126 to 37532. [2021-03-10 23:42:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 4.145319868908369) internal successors, (155578), 37531 states have internal predecessors, (155578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 155578 transitions. [2021-03-10 23:42:55,986 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 155578 transitions. Word has length 39 [2021-03-10 23:42:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:55,988 INFO L480 AbstractCegarLoop]: Abstraction has 37532 states and 155578 transitions. [2021-03-10 23:42:55,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 155578 transitions. [2021-03-10 23:42:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:42:56,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:56,086 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:56,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-03-10 23:42:56,287 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1355985241, now seen corresponding path program 35 times [2021-03-10 23:42:56,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:56,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884217135] [2021-03-10 23:42:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:56,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884217135] [2021-03-10 23:42:56,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357898902] [2021-03-10 23:42:56,767 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 [2021-03-10 23:42:56,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:42:56,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:56,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:42:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:57,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:57,106 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 53 [2021-03-10 23:42:57,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:42:57,139 INFO L628 ElimStorePlain]: treesize reduction 28, result has 63.6 percent of original size [2021-03-10 23:42:57,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:57,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:50 [2021-03-10 23:42:57,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:42:57,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:57,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:57,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:57,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-03-10 23:42:57,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:57,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:57,324 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 22 treesize of output 41 [2021-03-10 23:42:57,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:42:57,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:57,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:57,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-03-10 23:42:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:57,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:57,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-03-10 23:42:57,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283071630] [2021-03-10 23:42:57,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:42:57,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:42:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:42:57,412 INFO L87 Difference]: Start difference. First operand 37532 states and 155578 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:59,513 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 23:43:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:01,479 INFO L93 Difference]: Finished difference Result 64772 states and 264355 transitions. [2021-03-10 23:43:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 23:43:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:01,670 INFO L225 Difference]: With dead ends: 64772 [2021-03-10 23:43:01,670 INFO L226 Difference]: Without dead ends: 64551 [2021-03-10 23:43:01,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 3134.1ms TimeCoverageRelationStatistics Valid=740, Invalid=4090, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 23:43:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64551 states. [2021-03-10 23:43:02,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64551 to 37928. [2021-03-10 23:43:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37928 states, 37927 states have (on average 4.1405067629920635) internal successors, (157037), 37927 states have internal predecessors, (157037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37928 states to 37928 states and 157037 transitions. [2021-03-10 23:43:02,826 INFO L78 Accepts]: Start accepts. Automaton has 37928 states and 157037 transitions. Word has length 39 [2021-03-10 23:43:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:02,826 INFO L480 AbstractCegarLoop]: Abstraction has 37928 states and 157037 transitions. [2021-03-10 23:43:02,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 37928 states and 157037 transitions. [2021-03-10 23:43:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:02,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:02,901 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:03,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:03,103 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash -768675797, now seen corresponding path program 36 times [2021-03-10 23:43:03,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:03,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33197990] [2021-03-10 23:43:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:03,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33197990] [2021-03-10 23:43:03,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436754483] [2021-03-10 23:43:03,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:03,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:43:03,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 23:43:03,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:03,927 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-10 23:43:04,069 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:43:04,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 19 [2021-03-10 23:43:04,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:04,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:04,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:43:04,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-03-10 23:43:04,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 23 [2021-03-10 23:43:04,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:04,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:04,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:43:04,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-03-10 23:43:04,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:04,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-03-10 23:43:04,260 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:04,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:04,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:04,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-03-10 23:43:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:04,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:04,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-10 23:43:04,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121613818] [2021-03-10 23:43:04,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:43:04,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:04,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:43:04,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:43:04,346 INFO L87 Difference]: Start difference. First operand 37928 states and 157037 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:07,317 INFO L93 Difference]: Finished difference Result 88379 states and 359748 transitions. [2021-03-10 23:43:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:43:07,318 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:07,580 INFO L225 Difference]: With dead ends: 88379 [2021-03-10 23:43:07,580 INFO L226 Difference]: Without dead ends: 88176 [2021-03-10 23:43:07,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1799.3ms TimeCoverageRelationStatistics Valid=587, Invalid=2493, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:43:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88176 states. [2021-03-10 23:43:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88176 to 37667. [2021-03-10 23:43:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37667 states, 37666 states have (on average 4.144108745287527) internal successors, (156092), 37666 states have internal predecessors, (156092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37667 states to 37667 states and 156092 transitions. [2021-03-10 23:43:08,869 INFO L78 Accepts]: Start accepts. Automaton has 37667 states and 156092 transitions. Word has length 39 [2021-03-10 23:43:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:08,870 INFO L480 AbstractCegarLoop]: Abstraction has 37667 states and 156092 transitions. [2021-03-10 23:43:08,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 37667 states and 156092 transitions. [2021-03-10 23:43:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:08,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:08,939 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:09,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:09,139 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash -789200017, now seen corresponding path program 37 times [2021-03-10 23:43:09,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:09,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093316177] [2021-03-10 23:43:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:09,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093316177] [2021-03-10 23:43:09,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371276578] [2021-03-10 23:43:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:43:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:43:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:09,866 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:43:09,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-03-10 23:43:09,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:09,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:09,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:09,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-03-10 23:43:09,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:43:09,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:09,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:09,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:09,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:43:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:09,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:09,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:43:09,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835424278] [2021-03-10 23:43:09,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:43:09,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:43:09,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:43:09,980 INFO L87 Difference]: Start difference. First operand 37667 states and 156092 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:10,863 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:43:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:12,347 INFO L93 Difference]: Finished difference Result 65880 states and 269420 transitions. [2021-03-10 23:43:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:43:12,348 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:12,541 INFO L225 Difference]: With dead ends: 65880 [2021-03-10 23:43:12,541 INFO L226 Difference]: Without dead ends: 65632 [2021-03-10 23:43:12,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1598.7ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:43:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65632 states. [2021-03-10 23:43:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65632 to 37853. [2021-03-10 23:43:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37853 states, 37852 states have (on average 4.142238190848568) internal successors, (156792), 37852 states have internal predecessors, (156792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37853 states to 37853 states and 156792 transitions. [2021-03-10 23:43:13,716 INFO L78 Accepts]: Start accepts. Automaton has 37853 states and 156792 transitions. Word has length 39 [2021-03-10 23:43:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:13,716 INFO L480 AbstractCegarLoop]: Abstraction has 37853 states and 156792 transitions. [2021-03-10 23:43:13,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 37853 states and 156792 transitions. [2021-03-10 23:43:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:13,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:13,787 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:13,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:13,988 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:13,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900731, now seen corresponding path program 38 times [2021-03-10 23:43:13,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:13,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53665530] [2021-03-10 23:43:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:14,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53665530] [2021-03-10 23:43:14,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30754576] [2021-03-10 23:43:14,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:14,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:43:14,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:14,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:43:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:14,961 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:43:15,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:43:15,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:15,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:15,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:15,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:43:15,158 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:43:15,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:43:15,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:15,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:15,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:15,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:43:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:15,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:15,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:43:15,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951694146] [2021-03-10 23:43:15,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:43:15,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:43:15,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:43:15,220 INFO L87 Difference]: Start difference. First operand 37853 states and 156792 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:17,748 INFO L93 Difference]: Finished difference Result 83329 states and 339066 transitions. [2021-03-10 23:43:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:43:17,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:17,997 INFO L225 Difference]: With dead ends: 83329 [2021-03-10 23:43:17,997 INFO L226 Difference]: Without dead ends: 83177 [2021-03-10 23:43:17,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1751.3ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:43:18,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83177 states. [2021-03-10 23:43:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83177 to 37915. [2021-03-10 23:43:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37915 states, 37914 states have (on average 4.143166112781558) internal successors, (157084), 37914 states have internal predecessors, (157084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37915 states to 37915 states and 157084 transitions. [2021-03-10 23:43:19,307 INFO L78 Accepts]: Start accepts. Automaton has 37915 states and 157084 transitions. Word has length 39 [2021-03-10 23:43:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:19,307 INFO L480 AbstractCegarLoop]: Abstraction has 37915 states and 157084 transitions. [2021-03-10 23:43:19,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 37915 states and 157084 transitions. [2021-03-10 23:43:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:19,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:19,375 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:19,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:19,576 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:19,576 INFO L82 PathProgramCache]: Analyzing trace with hash -908979985, now seen corresponding path program 39 times [2021-03-10 23:43:19,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:19,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138459772] [2021-03-10 23:43:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:20,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138459772] [2021-03-10 23:43:20,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416366976] [2021-03-10 23:43:20,063 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 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 [2021-03-10 23:43:20,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:43:20,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:43:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:20,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:20,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 49 [2021-03-10 23:43:20,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:20,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:20,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:20,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:69 [2021-03-10 23:43:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:20,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:20,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-03-10 23:43:20,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:20,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-03-10 23:43:20,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:20,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:20,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:20,643 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-03-10 23:43:20,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:20,668 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-10 23:43:20,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-03-10 23:43:20,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:20,790 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 23:43:20,790 INFO L628 ElimStorePlain]: treesize reduction 58, result has 69.5 percent of original size [2021-03-10 23:43:20,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:43:20,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:245, output treesize:189 [2021-03-10 23:43:20,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:20,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:43:20,969 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:21,101 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-03-10 23:43:21,102 INFO L628 ElimStorePlain]: treesize reduction 27, result has 83.5 percent of original size [2021-03-10 23:43:21,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:21,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:43:21,114 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:21,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:21,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:21,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:43:21,189 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:21,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:21,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:43:21,260 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:165, output treesize:152 [2021-03-10 23:43:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:21,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:21,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 23:43:21,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725481801] [2021-03-10 23:43:21,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:43:21,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:21,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:43:21,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:43:21,575 INFO L87 Difference]: Start difference. First operand 37915 states and 157084 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:22,248 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-03-10 23:43:22,582 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:43:23,970 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-03-10 23:43:25,162 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-03-10 23:43:25,863 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-10 23:43:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:26,339 INFO L93 Difference]: Finished difference Result 68626 states and 278499 transitions. [2021-03-10 23:43:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:43:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:26,533 INFO L225 Difference]: With dead ends: 68626 [2021-03-10 23:43:26,534 INFO L226 Difference]: Without dead ends: 68454 [2021-03-10 23:43:26,534 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 4203.9ms TimeCoverageRelationStatistics Valid=909, Invalid=3381, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:43:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68454 states. [2021-03-10 23:43:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68454 to 37937. [2021-03-10 23:43:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37937 states, 37936 states have (on average 4.142977646562632) internal successors, (157168), 37936 states have internal predecessors, (157168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37937 states to 37937 states and 157168 transitions. [2021-03-10 23:43:27,655 INFO L78 Accepts]: Start accepts. Automaton has 37937 states and 157168 transitions. Word has length 39 [2021-03-10 23:43:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:27,655 INFO L480 AbstractCegarLoop]: Abstraction has 37937 states and 157168 transitions. [2021-03-10 23:43:27,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 37937 states and 157168 transitions. [2021-03-10 23:43:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:27,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:27,726 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:27,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:27,932 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1386806843, now seen corresponding path program 40 times [2021-03-10 23:43:27,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:27,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962003023] [2021-03-10 23:43:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:28,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962003023] [2021-03-10 23:43:28,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053131936] [2021-03-10 23:43:28,370 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 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 [2021-03-10 23:43:28,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:43:28,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:43:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:28,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:43:28,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:28,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:28,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:28,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:43:28,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:43:28,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:43:28,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:28,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:28,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:28,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:43:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:28,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:28,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:43:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118862205] [2021-03-10 23:43:28,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:43:28,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:28,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:43:28,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:43:28,781 INFO L87 Difference]: Start difference. First operand 37937 states and 157168 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:31,333 INFO L93 Difference]: Finished difference Result 83924 states and 342044 transitions. [2021-03-10 23:43:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:43:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:31,579 INFO L225 Difference]: With dead ends: 83924 [2021-03-10 23:43:31,580 INFO L226 Difference]: Without dead ends: 83842 [2021-03-10 23:43:31,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1438.7ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:43:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83842 states. [2021-03-10 23:43:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83842 to 37783. [2021-03-10 23:43:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37783 states, 37782 states have (on average 4.14557196548621) internal successors, (156628), 37782 states have internal predecessors, (156628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37783 states to 37783 states and 156628 transitions. [2021-03-10 23:43:33,326 INFO L78 Accepts]: Start accepts. Automaton has 37783 states and 156628 transitions. Word has length 39 [2021-03-10 23:43:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:33,327 INFO L480 AbstractCegarLoop]: Abstraction has 37783 states and 156628 transitions. [2021-03-10 23:43:33,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 37783 states and 156628 transitions. [2021-03-10 23:43:33,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:33,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:33,402 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:33,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:33,602 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash -651444937, now seen corresponding path program 41 times [2021-03-10 23:43:33,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:33,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89937858] [2021-03-10 23:43:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:33,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89937858] [2021-03-10 23:43:33,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685027862] [2021-03-10 23:43:33,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:34,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:43:34,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:43:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:34,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:34,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:34,772 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 50 [2021-03-10 23:43:34,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:43:34,828 INFO L628 ElimStorePlain]: treesize reduction 24, result has 68.4 percent of original size [2021-03-10 23:43:34,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:43:34,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:47 [2021-03-10 23:43:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:34,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:34,994 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 50 [2021-03-10 23:43:34,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:43:35,027 INFO L628 ElimStorePlain]: treesize reduction 20, result has 63.6 percent of original size [2021-03-10 23:43:35,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:43:35,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:45 [2021-03-10 23:43:35,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:35,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-03-10 23:43:35,259 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:43:35,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:35,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:35,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:18 [2021-03-10 23:43:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:35,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:35,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:43:35,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683265138] [2021-03-10 23:43:35,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:43:35,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:35,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:43:35,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:43:35,348 INFO L87 Difference]: Start difference. First operand 37783 states and 156628 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:36,207 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 23:43:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:39,385 INFO L93 Difference]: Finished difference Result 66268 states and 270213 transitions. [2021-03-10 23:43:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:43:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:39,576 INFO L225 Difference]: With dead ends: 66268 [2021-03-10 23:43:39,577 INFO L226 Difference]: Without dead ends: 66174 [2021-03-10 23:43:39,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 3291.8ms TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:43:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66174 states. [2021-03-10 23:43:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66174 to 38640. [2021-03-10 23:43:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38640 states, 38639 states have (on average 4.145215973498279) internal successors, (160167), 38639 states have internal predecessors, (160167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38640 states to 38640 states and 160167 transitions. [2021-03-10 23:43:40,629 INFO L78 Accepts]: Start accepts. Automaton has 38640 states and 160167 transitions. Word has length 39 [2021-03-10 23:43:40,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:40,629 INFO L480 AbstractCegarLoop]: Abstraction has 38640 states and 160167 transitions. [2021-03-10 23:43:40,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 38640 states and 160167 transitions. [2021-03-10 23:43:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:40,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:40,698 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:40,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-10 23:43:40,899 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1147513441, now seen corresponding path program 42 times [2021-03-10 23:43:40,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:40,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157499260] [2021-03-10 23:43:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:41,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157499260] [2021-03-10 23:43:41,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166127228] [2021-03-10 23:43:41,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:41,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:43:41,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:41,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:43:41,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:41,587 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:43:41,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 23:43:41,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:41,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:41,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:41,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-03-10 23:43:41,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-03-10 23:43:41,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:41,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:41,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:41,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-03-10 23:43:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:41,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:41,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:43:41,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938976633] [2021-03-10 23:43:41,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:43:41,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:43:41,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:43:41,715 INFO L87 Difference]: Start difference. First operand 38640 states and 160167 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:44,078 INFO L93 Difference]: Finished difference Result 74818 states and 307630 transitions. [2021-03-10 23:43:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:43:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:44,295 INFO L225 Difference]: With dead ends: 74818 [2021-03-10 23:43:44,295 INFO L226 Difference]: Without dead ends: 74763 [2021-03-10 23:43:44,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1327.0ms TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:43:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74763 states. [2021-03-10 23:43:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74763 to 38603. [2021-03-10 23:43:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38603 states, 38602 states have (on average 4.141650691674006) internal successors, (159876), 38602 states have internal predecessors, (159876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38603 states to 38603 states and 159876 transitions. [2021-03-10 23:43:45,515 INFO L78 Accepts]: Start accepts. Automaton has 38603 states and 159876 transitions. Word has length 39 [2021-03-10 23:43:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:45,515 INFO L480 AbstractCegarLoop]: Abstraction has 38603 states and 159876 transitions. [2021-03-10 23:43:45,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 38603 states and 159876 transitions. [2021-03-10 23:43:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:45,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:45,585 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:45,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 23:43:45,785 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:45,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1283074537, now seen corresponding path program 43 times [2021-03-10 23:43:45,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:45,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720271536] [2021-03-10 23:43:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:46,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720271536] [2021-03-10 23:43:46,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624892148] [2021-03-10 23:43:46,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:46,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:43:46,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:46,531 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 23:43:46,725 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:43:46,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 23:43:46,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:46,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:46,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:46,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-03-10 23:43:46,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:43:46,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:46,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:46,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:46,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:43:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:46,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:46,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:43:46,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594388205] [2021-03-10 23:43:46,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:43:46,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:46,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:43:46,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:43:46,872 INFO L87 Difference]: Start difference. First operand 38603 states and 159876 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:49,555 INFO L93 Difference]: Finished difference Result 70307 states and 287574 transitions. [2021-03-10 23:43:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:43:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:49,773 INFO L225 Difference]: With dead ends: 70307 [2021-03-10 23:43:49,773 INFO L226 Difference]: Without dead ends: 70091 [2021-03-10 23:43:49,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1386.8ms TimeCoverageRelationStatistics Valid=335, Invalid=1735, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:43:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70091 states. [2021-03-10 23:43:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70091 to 38453. [2021-03-10 23:43:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38453 states, 38452 states have (on average 4.142515343805264) internal successors, (159288), 38452 states have internal predecessors, (159288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38453 states to 38453 states and 159288 transitions. [2021-03-10 23:43:51,086 INFO L78 Accepts]: Start accepts. Automaton has 38453 states and 159288 transitions. Word has length 39 [2021-03-10 23:43:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:51,086 INFO L480 AbstractCegarLoop]: Abstraction has 38453 states and 159288 transitions. [2021-03-10 23:43:51,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:51,086 INFO L276 IsEmpty]: Start isEmpty. Operand 38453 states and 159288 transitions. [2021-03-10 23:43:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:51,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:51,168 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:51,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 23:43:51,369 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:51,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1808675789, now seen corresponding path program 44 times [2021-03-10 23:43:51,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:51,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381333071] [2021-03-10 23:43:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:51,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381333071] [2021-03-10 23:43:51,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952714765] [2021-03-10 23:43:51,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:51,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:43:51,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:51,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:43:51,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:51,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:43:51,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:51,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:51,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:51,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-03-10 23:43:52,018 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:43:52,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 treesize of output 22 [2021-03-10 23:43:52,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:52,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:52,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:52,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-03-10 23:43:52,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:52,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:43:52,106 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:52,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:52,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:52,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-03-10 23:43:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:52,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:52,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-10 23:43:52,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642513218] [2021-03-10 23:43:52,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:43:52,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:52,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:43:52,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:43:52,165 INFO L87 Difference]: Start difference. First operand 38453 states and 159288 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:54,853 INFO L93 Difference]: Finished difference Result 90605 states and 373157 transitions. [2021-03-10 23:43:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:43:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:43:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:55,132 INFO L225 Difference]: With dead ends: 90605 [2021-03-10 23:43:55,132 INFO L226 Difference]: Without dead ends: 90550 [2021-03-10 23:43:55,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1441.2ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:43:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90550 states. [2021-03-10 23:43:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90550 to 38975. [2021-03-10 23:43:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38975 states, 38974 states have (on average 4.144147380304819) internal successors, (161514), 38974 states have internal predecessors, (161514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38975 states to 38975 states and 161514 transitions. [2021-03-10 23:43:56,495 INFO L78 Accepts]: Start accepts. Automaton has 38975 states and 161514 transitions. Word has length 39 [2021-03-10 23:43:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:56,495 INFO L480 AbstractCegarLoop]: Abstraction has 38975 states and 161514 transitions. [2021-03-10 23:43:56,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 38975 states and 161514 transitions. [2021-03-10 23:43:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:43:56,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:56,566 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:56,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-10 23:43:56,767 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:56,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1848703477, now seen corresponding path program 45 times [2021-03-10 23:43:56,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:56,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338304009] [2021-03-10 23:43:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:57,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338304009] [2021-03-10 23:43:57,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960923337] [2021-03-10 23:43:57,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:57,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:43:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:57,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-03-10 23:43:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:57,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:57,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-03-10 23:43:57,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:57,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:57,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:57,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:68 [2021-03-10 23:43:57,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:57,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-03-10 23:43:57,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:57,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-03-10 23:43:57,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:57,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-03-10 23:43:57,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:57,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:57,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:43:57,820 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:159, output treesize:62 [2021-03-10 23:43:58,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:58,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:43:58,295 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:58,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:58,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-03-10 23:43:58,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:58,379 INFO L628 ElimStorePlain]: treesize reduction 13, result has 77.2 percent of original size [2021-03-10 23:43:58,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:43:58,382 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:45 [2021-03-10 23:43:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:58,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:58,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-03-10 23:43:58,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494053629] [2021-03-10 23:43:58,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:43:58,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:58,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:43:58,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:43:58,461 INFO L87 Difference]: Start difference. First operand 38975 states and 161514 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:00,128 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 23:44:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:03,591 INFO L93 Difference]: Finished difference Result 80248 states and 328568 transitions. [2021-03-10 23:44:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:44:03,592 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:44:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:03,836 INFO L225 Difference]: With dead ends: 80248 [2021-03-10 23:44:03,836 INFO L226 Difference]: Without dead ends: 80166 [2021-03-10 23:44:03,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 3153.7ms TimeCoverageRelationStatistics Valid=493, Invalid=3929, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:44:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80166 states. [2021-03-10 23:44:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80166 to 39121. [2021-03-10 23:44:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39121 states, 39120 states have (on average 4.142663599182004) internal successors, (162061), 39120 states have internal predecessors, (162061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39121 states to 39121 states and 162061 transitions. [2021-03-10 23:44:05,094 INFO L78 Accepts]: Start accepts. Automaton has 39121 states and 162061 transitions. Word has length 39 [2021-03-10 23:44:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:05,094 INFO L480 AbstractCegarLoop]: Abstraction has 39121 states and 162061 transitions. [2021-03-10 23:44:05,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 39121 states and 162061 transitions. [2021-03-10 23:44:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:44:05,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:05,169 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:05,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 23:44:05,370 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1027270795, now seen corresponding path program 46 times [2021-03-10 23:44:05,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:05,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203947828] [2021-03-10 23:44:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:05,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203947828] [2021-03-10 23:44:05,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521699483] [2021-03-10 23:44:05,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:05,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:44:05,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:05,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:44:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:06,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:44:06,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:06,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:06,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:06,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-03-10 23:44:06,159 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:44:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:44:06,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:06,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:06,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:06,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:44:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:06,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:06,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-03-10 23:44:06,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649514678] [2021-03-10 23:44:06,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:44:06,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:44:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:44:06,208 INFO L87 Difference]: Start difference. First operand 39121 states and 162061 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:06,478 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:44:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:08,513 INFO L93 Difference]: Finished difference Result 86772 states and 357747 transitions. [2021-03-10 23:44:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:44:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:44:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:08,782 INFO L225 Difference]: With dead ends: 86772 [2021-03-10 23:44:08,782 INFO L226 Difference]: Without dead ends: 86717 [2021-03-10 23:44:08,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1398.3ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:44:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86717 states. [2021-03-10 23:44:10,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86717 to 39559. [2021-03-10 23:44:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39559 states, 39558 states have (on average 4.147656605490672) internal successors, (164073), 39558 states have internal predecessors, (164073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39559 states to 39559 states and 164073 transitions. [2021-03-10 23:44:10,566 INFO L78 Accepts]: Start accepts. Automaton has 39559 states and 164073 transitions. Word has length 39 [2021-03-10 23:44:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:10,566 INFO L480 AbstractCegarLoop]: Abstraction has 39559 states and 164073 transitions. [2021-03-10 23:44:10,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 39559 states and 164073 transitions. [2021-03-10 23:44:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:44:10,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:10,643 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:10,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 23:44:10,844 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:10,845 INFO L82 PathProgramCache]: Analyzing trace with hash -49954505, now seen corresponding path program 47 times [2021-03-10 23:44:10,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:10,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379472993] [2021-03-10 23:44:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:11,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379472993] [2021-03-10 23:44:11,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342117983] [2021-03-10 23:44:11,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:11,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:44:11,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:11,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:44:11,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:11,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:11,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 57 [2021-03-10 23:44:11,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:11,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:11,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:11,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:121 [2021-03-10 23:44:11,778 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_7], 3=[q1], 6=[v_prenex_5]} [2021-03-10 23:44:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 23:44:11,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:11,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:11,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:11,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:11,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:11,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 26 [2021-03-10 23:44:11,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:11,892 INFO L628 ElimStorePlain]: treesize reduction 15, result has 82.1 percent of original size [2021-03-10 23:44:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:11,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:11,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:11,914 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 57 [2021-03-10 23:44:11,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 23:44:11,976 INFO L628 ElimStorePlain]: treesize reduction 39, result has 54.7 percent of original size [2021-03-10 23:44:11,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:44:11,980 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:126, output treesize:45 [2021-03-10 23:44:12,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:12,080 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 11 treesize of output 16 [2021-03-10 23:44:12,082 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:44:12,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:12,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:44:12,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-03-10 23:44:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:12,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:12,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:44:12,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45281806] [2021-03-10 23:44:12,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:44:12,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:12,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:44:12,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:44:12,162 INFO L87 Difference]: Start difference. First operand 39559 states and 164073 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:16,214 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-03-10 23:44:16,500 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-03-10 23:44:16,843 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 23:44:17,179 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 23:44:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:18,703 INFO L93 Difference]: Finished difference Result 76455 states and 312035 transitions. [2021-03-10 23:44:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 23:44:18,704 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:44:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:18,926 INFO L225 Difference]: With dead ends: 76455 [2021-03-10 23:44:18,927 INFO L226 Difference]: Without dead ends: 76345 [2021-03-10 23:44:18,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 4530.8ms TimeCoverageRelationStatistics Valid=1016, Invalid=6816, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 23:44:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76345 states. [2021-03-10 23:44:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76345 to 39885. [2021-03-10 23:44:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39885 states, 39884 states have (on average 4.147452612576472) internal successors, (165417), 39884 states have internal predecessors, (165417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39885 states to 39885 states and 165417 transitions. [2021-03-10 23:44:20,239 INFO L78 Accepts]: Start accepts. Automaton has 39885 states and 165417 transitions. Word has length 39 [2021-03-10 23:44:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:20,240 INFO L480 AbstractCegarLoop]: Abstraction has 39885 states and 165417 transitions. [2021-03-10 23:44:20,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 39885 states and 165417 transitions. [2021-03-10 23:44:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:44:20,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:20,317 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:20,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:20,518 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:20,518 INFO L82 PathProgramCache]: Analyzing trace with hash -526084731, now seen corresponding path program 48 times [2021-03-10 23:44:20,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:20,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042027293] [2021-03-10 23:44:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:20,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042027293] [2021-03-10 23:44:20,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642223925] [2021-03-10 23:44:20,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:20,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:44:20,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:20,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:44:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:21,146 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 37 treesize of output 29 [2021-03-10 23:44:21,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:21,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:21,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:21,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-03-10 23:44:21,257 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:44:21,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-03-10 23:44:21,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:21,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:21,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:21,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-03-10 23:44:21,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:21,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-03-10 23:44:21,313 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:44:21,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:21,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:21,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:14 [2021-03-10 23:44:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:21,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:21,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-10 23:44:21,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397780035] [2021-03-10 23:44:21,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:44:21,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:44:21,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:44:21,420 INFO L87 Difference]: Start difference. First operand 39885 states and 165417 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:25,624 INFO L93 Difference]: Finished difference Result 98853 states and 402459 transitions. [2021-03-10 23:44:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:44:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:44:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:26,311 INFO L225 Difference]: With dead ends: 98853 [2021-03-10 23:44:26,311 INFO L226 Difference]: Without dead ends: 98798 [2021-03-10 23:44:26,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2350.9ms TimeCoverageRelationStatistics Valid=728, Invalid=3694, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:44:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98798 states. [2021-03-10 23:44:27,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98798 to 39397. [2021-03-10 23:44:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39397 states, 39396 states have (on average 4.147933800385826) internal successors, (163412), 39396 states have internal predecessors, (163412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39397 states to 39397 states and 163412 transitions. [2021-03-10 23:44:27,806 INFO L78 Accepts]: Start accepts. Automaton has 39397 states and 163412 transitions. Word has length 39 [2021-03-10 23:44:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:27,807 INFO L480 AbstractCegarLoop]: Abstraction has 39397 states and 163412 transitions. [2021-03-10 23:44:27,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 39397 states and 163412 transitions. [2021-03-10 23:44:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:44:27,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:27,880 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:28,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-03-10 23:44:28,081 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:28,081 INFO L82 PathProgramCache]: Analyzing trace with hash 449743517, now seen corresponding path program 49 times [2021-03-10 23:44:28,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:28,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196454292] [2021-03-10 23:44:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:28,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196454292] [2021-03-10 23:44:28,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595275805] [2021-03-10 23:44:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:44:28,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:28,916 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:44:28,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-03-10 23:44:28,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:28,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:28,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:28,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-03-10 23:44:28,972 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 35 treesize of output 27 [2021-03-10 23:44:28,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:28,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:28,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:28,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:44:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:29,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:29,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:44:29,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816559814] [2021-03-10 23:44:29,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:44:29,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:29,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:44:29,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:44:29,036 INFO L87 Difference]: Start difference. First operand 39397 states and 163412 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:31,894 INFO L93 Difference]: Finished difference Result 71717 states and 293234 transitions. [2021-03-10 23:44:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:44:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:44:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:32,131 INFO L225 Difference]: With dead ends: 71717 [2021-03-10 23:44:32,132 INFO L226 Difference]: Without dead ends: 71469 [2021-03-10 23:44:32,132 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1590.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:44:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71469 states. [2021-03-10 23:44:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71469 to 39583. [2021-03-10 23:44:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39583 states, 39582 states have (on average 4.146127027436713) internal successors, (164112), 39582 states have internal predecessors, (164112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39583 states to 39583 states and 164112 transitions. [2021-03-10 23:44:33,405 INFO L78 Accepts]: Start accepts. Automaton has 39583 states and 164112 transitions. Word has length 39 [2021-03-10 23:44:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:33,405 INFO L480 AbstractCegarLoop]: Abstraction has 39583 states and 164112 transitions. [2021-03-10 23:44:33,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 39583 states and 164112 transitions. [2021-03-10 23:44:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:44:33,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:33,483 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:33,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:33,683 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:33,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1828137727, now seen corresponding path program 50 times [2021-03-10 23:44:33,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:33,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824343630] [2021-03-10 23:44:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:34,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824343630] [2021-03-10 23:44:34,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028886181] [2021-03-10 23:44:34,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:34,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:44:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:34,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:44:34,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:34,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:44:34,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:34,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:34,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:34,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:44:34,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:44:34,529 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 39 treesize of output 27 [2021-03-10 23:44:34,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:34,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:34,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:34,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:44:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:34,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:34,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:44:34,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90670473] [2021-03-10 23:44:34,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:44:34,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:34,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:44:34,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:44:34,600 INFO L87 Difference]: Start difference. First operand 39583 states and 164112 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:37,577 INFO L93 Difference]: Finished difference Result 88448 states and 360399 transitions. [2021-03-10 23:44:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:44:37,578 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:44:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:37,853 INFO L225 Difference]: With dead ends: 88448 [2021-03-10 23:44:37,853 INFO L226 Difference]: Without dead ends: 88280 [2021-03-10 23:44:37,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1651.8ms TimeCoverageRelationStatistics Valid=415, Invalid=2035, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:44:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88280 states. [2021-03-10 23:44:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88280 to 39645. [2021-03-10 23:44:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39645 states, 39644 states have (on average 4.147008374533347) internal successors, (164404), 39644 states have internal predecessors, (164404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39645 states to 39645 states and 164404 transitions. [2021-03-10 23:44:39,658 INFO L78 Accepts]: Start accepts. Automaton has 39645 states and 164404 transitions. Word has length 39 [2021-03-10 23:44:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:39,658 INFO L480 AbstractCegarLoop]: Abstraction has 39645 states and 164404 transitions. [2021-03-10 23:44:39,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 39645 states and 164404 transitions. [2021-03-10 23:44:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:44:39,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:39,740 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:39,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:39,943 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1624216981, now seen corresponding path program 51 times [2021-03-10 23:44:39,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:39,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442450340] [2021-03-10 23:44:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:40,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442450340] [2021-03-10 23:44:40,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982589974] [2021-03-10 23:44:40,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:40,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:44:40,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:40,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:44:40,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:40,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:40,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-03-10 23:44:40,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:40,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:40,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:40,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:40 [2021-03-10 23:44:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:41,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:41,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 49 [2021-03-10 23:44:41,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:41,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:41,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:44:41,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-03-10 23:44:41,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:41,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:44:41,101 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:44:41,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:41,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:44:41,140 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:44:41,189 INFO L628 ElimStorePlain]: treesize reduction 10, result has 82.1 percent of original size [2021-03-10 23:44:41,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:44:41,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-03-10 23:44:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:41,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:41,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 23:44:41,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511371705] [2021-03-10 23:44:41,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:44:41,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:41,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:44:41,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:44:41,334 INFO L87 Difference]: Start difference. First operand 39645 states and 164404 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:43,007 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-10 23:44:46,436 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-10 23:44:47,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:47,581 INFO L93 Difference]: Finished difference Result 72141 states and 293746 transitions. [2021-03-10 23:44:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 23:44:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:44:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:47,824 INFO L225 Difference]: With dead ends: 72141 [2021-03-10 23:44:47,825 INFO L226 Difference]: Without dead ends: 71978 [2021-03-10 23:44:47,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 4639.6ms TimeCoverageRelationStatistics Valid=1020, Invalid=5300, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 23:44:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71978 states. [2021-03-10 23:44:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71978 to 39847. [2021-03-10 23:44:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39847 states, 39846 states have (on average 4.144355769713396) internal successors, (165136), 39846 states have internal predecessors, (165136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39847 states to 39847 states and 165136 transitions. [2021-03-10 23:44:49,229 INFO L78 Accepts]: Start accepts. Automaton has 39847 states and 165136 transitions. Word has length 39 [2021-03-10 23:44:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:49,229 INFO L480 AbstractCegarLoop]: Abstraction has 39847 states and 165136 transitions. [2021-03-10 23:44:49,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 39847 states and 165136 transitions. [2021-03-10 23:44:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:44:49,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:49,310 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:49,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:49,510 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:49,511 INFO L82 PathProgramCache]: Analyzing trace with hash -986946043, now seen corresponding path program 52 times [2021-03-10 23:44:49,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:49,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456239029] [2021-03-10 23:44:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:49,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456239029] [2021-03-10 23:44:49,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268286771] [2021-03-10 23:44:49,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:50,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:44:50,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:50,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:44:50,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:50,313 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 37 treesize of output 29 [2021-03-10 23:44:50,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:50,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:50,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:50,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:44:50,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:44:50,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:44:50,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:50,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:50,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:50,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:44:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:50,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:50,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:44:50,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243018992] [2021-03-10 23:44:50,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:44:50,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:44:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:44:50,468 INFO L87 Difference]: Start difference. First operand 39847 states and 165136 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:53,695 INFO L93 Difference]: Finished difference Result 88398 states and 360276 transitions. [2021-03-10 23:44:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:44:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:44:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:53,964 INFO L225 Difference]: With dead ends: 88398 [2021-03-10 23:44:53,964 INFO L226 Difference]: Without dead ends: 88316 [2021-03-10 23:44:53,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1810.3ms TimeCoverageRelationStatistics Valid=411, Invalid=2241, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:44:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88316 states. [2021-03-10 23:44:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88316 to 39397. [2021-03-10 23:44:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39397 states, 39396 states have (on average 4.147933800385826) internal successors, (163412), 39396 states have internal predecessors, (163412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39397 states to 39397 states and 163412 transitions. [2021-03-10 23:44:55,394 INFO L78 Accepts]: Start accepts. Automaton has 39397 states and 163412 transitions. Word has length 39 [2021-03-10 23:44:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:55,394 INFO L480 AbstractCegarLoop]: Abstraction has 39397 states and 163412 transitions. [2021-03-10 23:44:55,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 39397 states and 163412 transitions. [2021-03-10 23:44:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:44:55,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:55,471 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:55,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:55,671 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 140092723, now seen corresponding path program 53 times [2021-03-10 23:44:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:55,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847371512] [2021-03-10 23:44:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:56,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847371512] [2021-03-10 23:44:56,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393437094] [2021-03-10 23:44:56,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:56,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:44:56,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:44:56,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:56,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:56,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:56,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 63 [2021-03-10 23:44:56,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:56,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:56,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:44:56,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:83 [2021-03-10 23:44:57,406 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:44:57,575 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_20], 3=[v_prenex_14, v_prenex_18]} [2021-03-10 23:44:57,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:57,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-03-10 23:44:57,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:44:57,703 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:44:57,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:57,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:57,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:44:57,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:44:57,835 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:44:57,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:57,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:57,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-03-10 23:44:57,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:57,993 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 23:44:57,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:58,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:58,019 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 41 [2021-03-10 23:44:58,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 23:44:58,360 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2021-03-10 23:44:58,361 INFO L628 ElimStorePlain]: treesize reduction 42, result has 84.8 percent of original size [2021-03-10 23:44:58,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 4 dim-1 vars, End of recursive call: 1 dim-0 vars, and 4 xjuncts. [2021-03-10 23:44:58,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:217, output treesize:137 [2021-03-10 23:44:58,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-03-10 23:44:58,935 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:44:58,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:58,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:44:58,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:26 [2021-03-10 23:44:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:59,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:59,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-03-10 23:44:59,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422572465] [2021-03-10 23:44:59,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:44:59,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:44:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:44:59,061 INFO L87 Difference]: Start difference. First operand 39397 states and 163412 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:00,482 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2021-03-10 23:45:00,848 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-03-10 23:45:01,088 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-03-10 23:45:01,988 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2021-03-10 23:45:02,182 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-03-10 23:45:02,730 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-03-10 23:45:03,113 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-03-10 23:45:03,535 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-03-10 23:45:04,490 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2021-03-10 23:45:04,821 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-03-10 23:45:06,078 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:45:06,710 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 23:45:07,125 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:45:07,535 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2021-03-10 23:45:08,038 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:45:09,035 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 23:45:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:09,974 INFO L93 Difference]: Finished difference Result 72559 states and 295160 transitions. [2021-03-10 23:45:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 23:45:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:45:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:10,215 INFO L225 Difference]: With dead ends: 72559 [2021-03-10 23:45:10,216 INFO L226 Difference]: Without dead ends: 72465 [2021-03-10 23:45:10,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 9345.9ms TimeCoverageRelationStatistics Valid=1070, Invalid=8242, Unknown=0, NotChecked=0, Total=9312 [2021-03-10 23:45:10,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72465 states. [2021-03-10 23:45:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72465 to 39743. [2021-03-10 23:45:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39743 states, 39742 states have (on average 4.1474762216295105) internal successors, (164829), 39742 states have internal predecessors, (164829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39743 states to 39743 states and 164829 transitions. [2021-03-10 23:45:11,490 INFO L78 Accepts]: Start accepts. Automaton has 39743 states and 164829 transitions. Word has length 39 [2021-03-10 23:45:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:45:11,491 INFO L480 AbstractCegarLoop]: Abstraction has 39743 states and 164829 transitions. [2021-03-10 23:45:11,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 39743 states and 164829 transitions. [2021-03-10 23:45:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:45:11,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:45:11,572 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:45:11,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:11,773 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:45:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:45:11,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1939051101, now seen corresponding path program 54 times [2021-03-10 23:45:11,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:45:11,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453447888] [2021-03-10 23:45:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:45:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:12,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453447888] [2021-03-10 23:45:12,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350236826] [2021-03-10 23:45:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:12,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:45:12,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:45:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 23:45:12,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:45:12,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:45:12,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:12,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:12,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:12,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-03-10 23:45:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:12,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:12,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 42 [2021-03-10 23:45:12,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:12,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:12,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:45:12,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:83 [2021-03-10 23:45:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:12,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:12,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-10 23:45:12,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539000873] [2021-03-10 23:45:12,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:45:12,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:45:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:45:12,852 INFO L87 Difference]: Start difference. First operand 39743 states and 164829 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:13,622 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 23:45:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:16,843 INFO L93 Difference]: Finished difference Result 91718 states and 376353 transitions. [2021-03-10 23:45:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:45:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:45:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:17,500 INFO L225 Difference]: With dead ends: 91718 [2021-03-10 23:45:17,501 INFO L226 Difference]: Without dead ends: 91663 [2021-03-10 23:45:17,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2643.8ms TimeCoverageRelationStatistics Valid=579, Invalid=2961, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:45:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91663 states. [2021-03-10 23:45:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91663 to 42836. [2021-03-10 23:45:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42836 states, 42835 states have (on average 4.159168903933699) internal successors, (178158), 42835 states have internal predecessors, (178158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42836 states to 42836 states and 178158 transitions. [2021-03-10 23:45:19,065 INFO L78 Accepts]: Start accepts. Automaton has 42836 states and 178158 transitions. Word has length 39 [2021-03-10 23:45:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:45:19,065 INFO L480 AbstractCegarLoop]: Abstraction has 42836 states and 178158 transitions. [2021-03-10 23:45:19,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:19,065 INFO L276 IsEmpty]: Start isEmpty. Operand 42836 states and 178158 transitions. [2021-03-10 23:45:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:45:19,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:45:19,148 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:45:19,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:19,349 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:45:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:45:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1123437359, now seen corresponding path program 55 times [2021-03-10 23:45:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:45:19,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170349408] [2021-03-10 23:45:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:45:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:19,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170349408] [2021-03-10 23:45:19,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919148806] [2021-03-10 23:45:19,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:45:19,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:45:20,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:45:20,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:20,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:20,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:20,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-03-10 23:45:20,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:45:20,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-03-10 23:45:20,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:20,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:20,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:20,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-03-10 23:45:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:20,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:20,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:45:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45510758] [2021-03-10 23:45:20,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:45:20,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:20,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:45:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:45:20,347 INFO L87 Difference]: Start difference. First operand 42836 states and 178158 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:21,113 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 23:45:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:23,820 INFO L93 Difference]: Finished difference Result 102494 states and 419975 transitions. [2021-03-10 23:45:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:45:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:45:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:24,190 INFO L225 Difference]: With dead ends: 102494 [2021-03-10 23:45:24,190 INFO L226 Difference]: Without dead ends: 102439 [2021-03-10 23:45:24,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1880.7ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:45:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102439 states. [2021-03-10 23:45:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102439 to 41344. [2021-03-10 23:45:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41344 states, 41343 states have (on average 4.148489466173234) internal successors, (171511), 41343 states have internal predecessors, (171511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41344 states to 41344 states and 171511 transitions. [2021-03-10 23:45:25,906 INFO L78 Accepts]: Start accepts. Automaton has 41344 states and 171511 transitions. Word has length 39 [2021-03-10 23:45:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:45:25,906 INFO L480 AbstractCegarLoop]: Abstraction has 41344 states and 171511 transitions. [2021-03-10 23:45:25,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 41344 states and 171511 transitions. [2021-03-10 23:45:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:45:25,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:45:25,988 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:45:26,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-10 23:45:26,189 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:45:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:45:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash -497495307, now seen corresponding path program 56 times [2021-03-10 23:45:26,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:45:26,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020981250] [2021-03-10 23:45:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:45:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:26,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020981250] [2021-03-10 23:45:26,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893758401] [2021-03-10 23:45:26,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:27,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:45:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:45:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:45:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:45:27,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:45:27,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:27,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:27,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:27,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-03-10 23:45:27,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:45:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-03-10 23:45:27,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:27,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:27,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:27,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-03-10 23:45:27,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:27,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:45:27,756 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:45:27,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:27,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:45:27,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-03-10 23:45:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:27,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:27,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-10 23:45:27,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192831699] [2021-03-10 23:45:27,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:45:27,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:45:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:45:27,836 INFO L87 Difference]: Start difference. First operand 41344 states and 171511 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:31,880 INFO L93 Difference]: Finished difference Result 106801 states and 441108 transitions. [2021-03-10 23:45:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:45:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:45:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:32,317 INFO L225 Difference]: With dead ends: 106801 [2021-03-10 23:45:32,317 INFO L226 Difference]: Without dead ends: 106746 [2021-03-10 23:45:32,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2376.4ms TimeCoverageRelationStatistics Valid=474, Invalid=2948, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:45:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106746 states. [2021-03-10 23:45:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106746 to 43343. [2021-03-10 23:45:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43343 states, 43342 states have (on average 4.152323381477551) internal successors, (179970), 43342 states have internal predecessors, (179970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43343 states to 43343 states and 179970 transitions. [2021-03-10 23:45:34,026 INFO L78 Accepts]: Start accepts. Automaton has 43343 states and 179970 transitions. Word has length 39 [2021-03-10 23:45:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:45:34,026 INFO L480 AbstractCegarLoop]: Abstraction has 43343 states and 179970 transitions. [2021-03-10 23:45:34,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 43343 states and 179970 transitions. [2021-03-10 23:45:34,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:45:34,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:45:34,114 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:45:34,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:34,315 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:45:34,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:45:34,315 INFO L82 PathProgramCache]: Analyzing trace with hash 921497717, now seen corresponding path program 57 times [2021-03-10 23:45:34,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:45:34,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044940537] [2021-03-10 23:45:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:45:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:34,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044940537] [2021-03-10 23:45:34,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972782691] [2021-03-10 23:45:34,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:34,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:45:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:45:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:45:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:45:35,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:35,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-03-10 23:45:35,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:35,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:35,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:35,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:56 [2021-03-10 23:45:35,539 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 23:45:36,228 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 23:45:36,559 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_27], 3=[q2, v_prenex_28]} [2021-03-10 23:45:36,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:36,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-03-10 23:45:36,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:45:36,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:36,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:36,671 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 35 treesize of output 53 [2021-03-10 23:45:36,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:36,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:36,794 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-03-10 23:45:36,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 41 [2021-03-10 23:45:36,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:36,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:36,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-03-10 23:45:36,912 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:144, output treesize:86 [2021-03-10 23:45:37,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:37,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2021-03-10 23:45:37,114 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:45:37,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:37,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:37,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:45:37,204 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:45:37,345 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 23:45:37,346 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.1 percent of original size [2021-03-10 23:45:37,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:45:37,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:108, output treesize:93 [2021-03-10 23:45:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:37,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:37,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-03-10 23:45:37,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734703737] [2021-03-10 23:45:37,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:45:37,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:45:37,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:45:37,619 INFO L87 Difference]: Start difference. First operand 43343 states and 179970 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:39,700 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 43 [2021-03-10 23:45:40,173 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-03-10 23:45:40,461 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-10 23:45:41,605 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-03-10 23:45:41,911 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-03-10 23:45:42,797 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-03-10 23:45:43,026 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-03-10 23:45:43,198 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-10 23:45:43,380 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:45:43,957 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-03-10 23:45:44,171 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-03-10 23:45:44,407 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-10 23:45:44,869 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2021-03-10 23:45:45,123 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-10 23:45:45,402 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-03-10 23:45:45,718 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 23:45:45,975 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-10 23:45:46,236 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-03-10 23:45:46,616 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:45:46,812 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-03-10 23:45:47,335 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-03-10 23:45:47,563 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 23:45:47,842 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2021-03-10 23:45:48,538 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 23:45:48,734 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 23:45:48,995 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:45:49,243 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 23:45:49,470 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-03-10 23:45:49,636 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:45:50,124 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-03-10 23:45:50,439 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:45:50,748 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 23:45:51,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:51,179 INFO L93 Difference]: Finished difference Result 84746 states and 346551 transitions. [2021-03-10 23:45:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 23:45:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:45:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:51,445 INFO L225 Difference]: With dead ends: 84746 [2021-03-10 23:45:51,445 INFO L226 Difference]: Without dead ends: 84664 [2021-03-10 23:45:51,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 10838.9ms TimeCoverageRelationStatistics Valid=814, Invalid=7018, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 23:45:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84664 states. [2021-03-10 23:45:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84664 to 43917. [2021-03-10 23:45:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43917 states, 43916 states have (on average 4.149990891702341) internal successors, (182251), 43916 states have internal predecessors, (182251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43917 states to 43917 states and 182251 transitions. [2021-03-10 23:45:52,878 INFO L78 Accepts]: Start accepts. Automaton has 43917 states and 182251 transitions. Word has length 39 [2021-03-10 23:45:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:45:52,878 INFO L480 AbstractCegarLoop]: Abstraction has 43917 states and 182251 transitions. [2021-03-10 23:45:52,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 43917 states and 182251 transitions. [2021-03-10 23:45:52,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:45:52,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:45:52,966 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:45:53,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-03-10 23:45:53,166 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:45:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:45:53,167 INFO L82 PathProgramCache]: Analyzing trace with hash -887461769, now seen corresponding path program 58 times [2021-03-10 23:45:53,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:45:53,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960864521] [2021-03-10 23:45:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:45:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:53,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960864521] [2021-03-10 23:45:53,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158475766] [2021-03-10 23:45:53,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:53,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:45:53,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:45:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:45:53,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:45:54,127 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-10 23:45:54,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:45:54,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:54,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:54,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:54,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-03-10 23:45:54,419 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:45:54,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:45:54,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:54,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:54,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:54,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:45:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:54,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:54,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:45:54,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539266650] [2021-03-10 23:45:54,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:45:54,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:45:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:45:54,519 INFO L87 Difference]: Start difference. First operand 43917 states and 182251 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:58,853 INFO L93 Difference]: Finished difference Result 119949 states and 487994 transitions. [2021-03-10 23:45:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:45:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:45:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:59,268 INFO L225 Difference]: With dead ends: 119949 [2021-03-10 23:45:59,268 INFO L226 Difference]: Without dead ends: 119894 [2021-03-10 23:45:59,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 2381.6ms TimeCoverageRelationStatistics Valid=537, Invalid=2433, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:45:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119894 states. [2021-03-10 23:46:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119894 to 43035. [2021-03-10 23:46:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43035 states, 43034 states have (on average 4.152484082353488) internal successors, (178698), 43034 states have internal predecessors, (178698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43035 states to 43035 states and 178698 transitions. [2021-03-10 23:46:00,943 INFO L78 Accepts]: Start accepts. Automaton has 43035 states and 178698 transitions. Word has length 39 [2021-03-10 23:46:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:00,944 INFO L480 AbstractCegarLoop]: Abstraction has 43035 states and 178698 transitions. [2021-03-10 23:46:00,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 43035 states and 178698 transitions. [2021-03-10 23:46:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:46:01,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:01,023 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:01,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:01,224 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:01,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1615119669, now seen corresponding path program 59 times [2021-03-10 23:46:01,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:01,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829463937] [2021-03-10 23:46:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829463937] [2021-03-10 23:46:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146161198] [2021-03-10 23:46:01,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:01,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:46:01,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:46:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:46:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:02,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 31 [2021-03-10 23:46:02,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:02,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:02,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:46:02,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:38 [2021-03-10 23:46:02,679 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:46:02,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:02,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:02,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:02,974 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 59 [2021-03-10 23:46:02,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:46:03,041 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-03-10 23:46:03,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:46:03,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:35 [2021-03-10 23:46:03,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:03,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:03,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:03,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-03-10 23:46:03,271 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:46:03,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:03,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:03,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:3 [2021-03-10 23:46:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:03,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:03,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-10 23:46:03,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606408735] [2021-03-10 23:46:03,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:46:03,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:03,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:46:03,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:46:03,334 INFO L87 Difference]: Start difference. First operand 43035 states and 178698 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:09,857 INFO L93 Difference]: Finished difference Result 85041 states and 349264 transitions. [2021-03-10 23:46:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:46:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:46:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:10,120 INFO L225 Difference]: With dead ends: 85041 [2021-03-10 23:46:10,120 INFO L226 Difference]: Without dead ends: 84986 [2021-03-10 23:46:10,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 3239.6ms TimeCoverageRelationStatistics Valid=380, Invalid=3280, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:46:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84986 states. [2021-03-10 23:46:11,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84986 to 43622. [2021-03-10 23:46:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43622 states, 43621 states have (on average 4.151394970312464) internal successors, (181088), 43621 states have internal predecessors, (181088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43622 states to 43622 states and 181088 transitions. [2021-03-10 23:46:11,468 INFO L78 Accepts]: Start accepts. Automaton has 43622 states and 181088 transitions. Word has length 39 [2021-03-10 23:46:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:11,468 INFO L480 AbstractCegarLoop]: Abstraction has 43622 states and 181088 transitions. [2021-03-10 23:46:11,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 43622 states and 181088 transitions. [2021-03-10 23:46:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:46:11,548 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:11,548 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:11,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:11,748 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:11,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1260854603, now seen corresponding path program 60 times [2021-03-10 23:46:11,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:11,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041921962] [2021-03-10 23:46:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:12,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041921962] [2021-03-10 23:46:12,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712688834] [2021-03-10 23:46:12,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:12,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:46:12,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:46:12,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:46:12,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:12,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:46:12,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:12,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:12,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:12,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-03-10 23:46:12,831 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:46:12,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:46:12,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:12,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:12,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:12,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:46:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:12,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:12,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-03-10 23:46:12,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385745193] [2021-03-10 23:46:12,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:46:12,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:12,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:46:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:46:12,911 INFO L87 Difference]: Start difference. First operand 43622 states and 181088 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:16,218 INFO L93 Difference]: Finished difference Result 94014 states and 388363 transitions. [2021-03-10 23:46:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:46:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:46:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:16,503 INFO L225 Difference]: With dead ends: 94014 [2021-03-10 23:46:16,503 INFO L226 Difference]: Without dead ends: 93959 [2021-03-10 23:46:16,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1637.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:46:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93959 states. [2021-03-10 23:46:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93959 to 43938. [2021-03-10 23:46:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43938 states, 43937 states have (on average 4.1536745795115735) internal successors, (182500), 43937 states have internal predecessors, (182500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43938 states to 43938 states and 182500 transitions. [2021-03-10 23:46:18,037 INFO L78 Accepts]: Start accepts. Automaton has 43938 states and 182500 transitions. Word has length 39 [2021-03-10 23:46:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:18,037 INFO L480 AbstractCegarLoop]: Abstraction has 43938 states and 182500 transitions. [2021-03-10 23:46:18,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 43938 states and 182500 transitions. [2021-03-10 23:46:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:46:18,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:18,525 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:18,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:18,739 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:18,739 INFO L82 PathProgramCache]: Analyzing trace with hash -595147851, now seen corresponding path program 61 times [2021-03-10 23:46:18,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:18,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206883565] [2021-03-10 23:46:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:19,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206883565] [2021-03-10 23:46:19,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270009425] [2021-03-10 23:46:19,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:19,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:46:19,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:19,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:46:19,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:19,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:19,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:19,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-03-10 23:46:19,926 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:46:19,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-03-10 23:46:19,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:19,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:19,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:19,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-03-10 23:46:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:20,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:20,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:46:20,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259426881] [2021-03-10 23:46:20,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:46:20,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:20,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:46:20,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:46:20,020 INFO L87 Difference]: Start difference. First operand 43938 states and 182500 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:23,267 INFO L93 Difference]: Finished difference Result 84141 states and 347306 transitions. [2021-03-10 23:46:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:46:23,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:46:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:23,529 INFO L225 Difference]: With dead ends: 84141 [2021-03-10 23:46:23,530 INFO L226 Difference]: Without dead ends: 84086 [2021-03-10 23:46:23,530 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1699.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:46:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84086 states. [2021-03-10 23:46:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84086 to 44232. [2021-03-10 23:46:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44232 states, 44231 states have (on average 4.154326151341819) internal successors, (183750), 44231 states have internal predecessors, (183750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44232 states to 44232 states and 183750 transitions. [2021-03-10 23:46:25,033 INFO L78 Accepts]: Start accepts. Automaton has 44232 states and 183750 transitions. Word has length 39 [2021-03-10 23:46:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:25,034 INFO L480 AbstractCegarLoop]: Abstraction has 44232 states and 183750 transitions. [2021-03-10 23:46:25,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:25,034 INFO L276 IsEmpty]: Start isEmpty. Operand 44232 states and 183750 transitions. [2021-03-10 23:46:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:46:25,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:25,140 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:25,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-03-10 23:46:25,355 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:25,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1535515861, now seen corresponding path program 62 times [2021-03-10 23:46:25,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:25,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122813251] [2021-03-10 23:46:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:25,594 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-03-10 23:46:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:26,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122813251] [2021-03-10 23:46:26,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530391233] [2021-03-10 23:46:26,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:26,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:46:26,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:46:26,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:46:26,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:26,715 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 37 treesize of output 29 [2021-03-10 23:46:26,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:26,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:26,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:26,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-03-10 23:46:26,903 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:46:26,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:46:26,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:26,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:26,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:26,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:46:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:27,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:27,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:46:27,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640703987] [2021-03-10 23:46:27,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:46:27,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:27,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:46:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:46:27,008 INFO L87 Difference]: Start difference. First operand 44232 states and 183750 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:31,211 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 23:46:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:32,718 INFO L93 Difference]: Finished difference Result 141381 states and 574207 transitions. [2021-03-10 23:46:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:46:32,720 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:46:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:33,660 INFO L225 Difference]: With dead ends: 141381 [2021-03-10 23:46:33,661 INFO L226 Difference]: Without dead ends: 141326 [2021-03-10 23:46:33,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 3332.7ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:46:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141326 states. [2021-03-10 23:46:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141326 to 43701. [2021-03-10 23:46:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43701 states, 43700 states have (on average 4.154599542334096) internal successors, (181556), 43700 states have internal predecessors, (181556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43701 states to 43701 states and 181556 transitions. [2021-03-10 23:46:35,539 INFO L78 Accepts]: Start accepts. Automaton has 43701 states and 181556 transitions. Word has length 39 [2021-03-10 23:46:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:35,539 INFO L480 AbstractCegarLoop]: Abstraction has 43701 states and 181556 transitions. [2021-03-10 23:46:35,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 43701 states and 181556 transitions. [2021-03-10 23:46:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:46:35,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:35,617 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:35,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-03-10 23:46:35,818 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1810207527, now seen corresponding path program 63 times [2021-03-10 23:46:35,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:35,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822373363] [2021-03-10 23:46:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:36,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822373363] [2021-03-10 23:46:36,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031839760] [2021-03-10 23:46:36,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:36,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:46:36,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:46:36,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:46:36,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:37,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:37,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:37,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-03-10 23:46:37,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:37,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:37,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:37,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:112 [2021-03-10 23:46:37,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:37,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 45 [2021-03-10 23:46:37,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:37,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:37,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:37,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-03-10 23:46:37,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:37,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2021-03-10 23:46:37,732 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:46:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:37,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-03-10 23:46:37,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:37,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:37,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 9 [2021-03-10 23:46:37,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:37,895 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 23:46:37,896 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.5 percent of original size [2021-03-10 23:46:37,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:46:37,898 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:54 [2021-03-10 23:46:38,568 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-03-10 23:46:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:38,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:38,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-03-10 23:46:38,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153651849] [2021-03-10 23:46:38,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:46:38,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:38,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:46:38,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:46:38,674 INFO L87 Difference]: Start difference. First operand 43701 states and 181556 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:39,424 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-10 23:46:40,956 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 23:46:41,492 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 23:46:41,882 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-03-10 23:46:42,681 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 23:46:42,930 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-03-10 23:46:43,657 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-03-10 23:46:44,417 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-03-10 23:46:44,801 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-03-10 23:46:45,488 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 23:46:45,795 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 23:46:46,265 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 23:46:46,479 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2021-03-10 23:46:46,988 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-10 23:46:47,186 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 23:46:47,723 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:46:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:48,175 INFO L93 Difference]: Finished difference Result 70333 states and 286331 transitions. [2021-03-10 23:46:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 23:46:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:46:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:48,386 INFO L225 Difference]: With dead ends: 70333 [2021-03-10 23:46:48,386 INFO L226 Difference]: Without dead ends: 70185 [2021-03-10 23:46:48,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 7391.2ms TimeCoverageRelationStatistics Valid=765, Invalid=4205, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:46:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70185 states. [2021-03-10 23:46:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70185 to 44139. [2021-03-10 23:46:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44139 states, 44138 states have (on average 4.149848203362183) internal successors, (183166), 44138 states have internal predecessors, (183166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44139 states to 44139 states and 183166 transitions. [2021-03-10 23:46:49,579 INFO L78 Accepts]: Start accepts. Automaton has 44139 states and 183166 transitions. Word has length 39 [2021-03-10 23:46:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:49,579 INFO L480 AbstractCegarLoop]: Abstraction has 44139 states and 183166 transitions. [2021-03-10 23:46:49,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 44139 states and 183166 transitions. [2021-03-10 23:46:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:46:49,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:49,661 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:49,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-03-10 23:46:49,862 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:49,863 INFO L82 PathProgramCache]: Analyzing trace with hash 802922859, now seen corresponding path program 64 times [2021-03-10 23:46:49,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:49,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247563433] [2021-03-10 23:46:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:50,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247563433] [2021-03-10 23:46:50,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358027627] [2021-03-10 23:46:50,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:50,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:46:50,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:46:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:46:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:51,290 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:46:51,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-03-10 23:46:51,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:51,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:51,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:51,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-03-10 23:46:51,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:46:51,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:51,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:51,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:51,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:46:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:51,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:51,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:46:51,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970903151] [2021-03-10 23:46:51,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:46:51,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:46:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:46:51,514 INFO L87 Difference]: Start difference. First operand 44139 states and 183166 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:52,196 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:46:52,845 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-10 23:46:54,490 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 23:46:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:56,799 INFO L93 Difference]: Finished difference Result 91530 states and 372871 transitions. [2021-03-10 23:46:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:46:56,801 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:46:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:57,410 INFO L225 Difference]: With dead ends: 91530 [2021-03-10 23:46:57,410 INFO L226 Difference]: Without dead ends: 91306 [2021-03-10 23:46:57,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 4010.8ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:46:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91306 states. [2021-03-10 23:46:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91306 to 44031. [2021-03-10 23:46:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44031 states, 44030 states have (on average 4.151623892800363) internal successors, (182796), 44030 states have internal predecessors, (182796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44031 states to 44031 states and 182796 transitions. [2021-03-10 23:46:58,829 INFO L78 Accepts]: Start accepts. Automaton has 44031 states and 182796 transitions. Word has length 39 [2021-03-10 23:46:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:58,829 INFO L480 AbstractCegarLoop]: Abstraction has 44031 states and 182796 transitions. [2021-03-10 23:46:58,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:58,830 INFO L276 IsEmpty]: Start isEmpty. Operand 44031 states and 182796 transitions. [2021-03-10 23:46:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:46:58,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:58,911 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:59,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:59,111 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:59,112 INFO L82 PathProgramCache]: Analyzing trace with hash 206878525, now seen corresponding path program 65 times [2021-03-10 23:46:59,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:59,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235587320] [2021-03-10 23:46:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:59,833 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:47:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:00,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235587320] [2021-03-10 23:47:00,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985806502] [2021-03-10 23:47:00,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:47:00,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:47:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:47:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:47:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:47:01,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:01,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:01,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-03-10 23:47:01,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:01,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:01,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:47:01,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:89 [2021-03-10 23:47:01,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:01,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-03-10 23:47:01,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:01,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:01,416 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 48 [2021-03-10 23:47:01,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:47:01,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:01,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2021-03-10 23:47:01,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:01,716 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-03-10 23:47:01,717 INFO L628 ElimStorePlain]: treesize reduction 51, result has 76.6 percent of original size [2021-03-10 23:47:01,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:47:01,736 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:134, output treesize:86 [2021-03-10 23:47:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:02,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:02,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-03-10 23:47:02,049 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:47:02,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:02,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:47:02,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-03-10 23:47:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:02,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:47:02,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:47:02,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069338188] [2021-03-10 23:47:02,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:47:02,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:47:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:47:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:47:02,220 INFO L87 Difference]: Start difference. First operand 44031 states and 182796 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:03,546 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:47:04,408 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 23:47:04,960 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 36 [2021-03-10 23:47:05,637 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 40 [2021-03-10 23:47:06,132 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 23:47:06,963 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-03-10 23:47:07,213 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-10 23:47:07,512 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 23:47:08,139 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 23:47:08,607 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 23:47:09,174 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:47:09,686 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 23:47:10,138 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 23:47:10,602 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 23:47:11,041 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 23:47:14,535 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-03-10 23:47:14,845 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-03-10 23:47:15,604 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:47:15,994 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 23:47:16,620 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-03-10 23:47:18,871 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 23:47:19,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:47:19,399 INFO L93 Difference]: Finished difference Result 96185 states and 390137 transitions. [2021-03-10 23:47:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-03-10 23:47:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:47:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:47:19,734 INFO L225 Difference]: With dead ends: 96185 [2021-03-10 23:47:19,735 INFO L226 Difference]: Without dead ends: 95740 [2021-03-10 23:47:19,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3502 ImplicationChecksByTransitivity, 11916.1ms TimeCoverageRelationStatistics Valid=1404, Invalid=9516, Unknown=0, NotChecked=0, Total=10920 [2021-03-10 23:47:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95740 states. [2021-03-10 23:47:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95740 to 44453. [2021-03-10 23:47:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44453 states, 44452 states have (on average 4.148969675155223) internal successors, (184430), 44452 states have internal predecessors, (184430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44453 states to 44453 states and 184430 transitions. [2021-03-10 23:47:21,692 INFO L78 Accepts]: Start accepts. Automaton has 44453 states and 184430 transitions. Word has length 39 [2021-03-10 23:47:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:47:21,692 INFO L480 AbstractCegarLoop]: Abstraction has 44453 states and 184430 transitions. [2021-03-10 23:47:21,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 44453 states and 184430 transitions. [2021-03-10 23:47:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:47:21,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:47:21,786 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:47:21,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-03-10 23:47:21,999 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:47:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:47:21,999 INFO L82 PathProgramCache]: Analyzing trace with hash 410799271, now seen corresponding path program 66 times [2021-03-10 23:47:21,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:47:21,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178887047] [2021-03-10 23:47:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:47:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:47:22,720 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:47:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:22,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178887047] [2021-03-10 23:47:22,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560586166] [2021-03-10 23:47:22,979 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 [2021-03-10 23:47:23,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:47:23,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:47:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:47:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:47:23,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:47:23,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:23,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:23,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-10 23:47:23,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-03-10 23:47:23,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:23,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:23,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 [2021-03-10 23:47:23,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:24,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:24,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:47:24,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:51, output treesize:19 [2021-03-10 23:47:24,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:24,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-03-10 23:47:24,212 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:47:24,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:24,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:47:24,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-03-10 23:47:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:24,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:47:24,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-03-10 23:47:24,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164758437] [2021-03-10 23:47:24,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:47:24,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:47:24,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:47:24,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:47:24,563 INFO L87 Difference]: Start difference. First operand 44453 states and 184430 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:25,629 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-03-10 23:47:26,020 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 23:47:26,536 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-03-10 23:47:27,069 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-10 23:47:27,358 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 23:47:27,774 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-10 23:47:28,135 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 23:47:28,384 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-10 23:47:29,150 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 23:47:30,029 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-10 23:47:30,216 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:47:31,208 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 23:47:32,596 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 23:47:33,081 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-10 23:47:33,393 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-03-10 23:47:33,772 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 23:47:34,101 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-03-10 23:47:34,895 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:47:35,698 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-03-10 23:47:36,003 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-03-10 23:47:36,481 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 23:47:36,816 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-10 23:47:37,166 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 23:47:38,082 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:47:38,633 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 23:47:38,886 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:47:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:47:39,779 INFO L93 Difference]: Finished difference Result 119705 states and 492340 transitions. [2021-03-10 23:47:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-03-10 23:47:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:47:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:47:40,253 INFO L225 Difference]: With dead ends: 119705 [2021-03-10 23:47:40,253 INFO L226 Difference]: Without dead ends: 119498 [2021-03-10 23:47:40,254 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 11353.9ms TimeCoverageRelationStatistics Valid=1265, Invalid=6745, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 23:47:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119498 states. [2021-03-10 23:47:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119498 to 44703. [2021-03-10 23:47:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44703 states, 44702 states have (on average 4.1486958077938345) internal successors, (185455), 44702 states have internal predecessors, (185455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44703 states to 44703 states and 185455 transitions. [2021-03-10 23:47:42,162 INFO L78 Accepts]: Start accepts. Automaton has 44703 states and 185455 transitions. Word has length 39 [2021-03-10 23:47:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:47:42,162 INFO L480 AbstractCegarLoop]: Abstraction has 44703 states and 185455 transitions. [2021-03-10 23:47:42,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 44703 states and 185455 transitions. [2021-03-10 23:47:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:47:42,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:47:42,246 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:47:42,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:47:42,447 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:47:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:47:42,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1048070209, now seen corresponding path program 67 times [2021-03-10 23:47:42,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:47:42,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10964096] [2021-03-10 23:47:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:47:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:47:43,687 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:47:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:43,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10964096] [2021-03-10 23:47:43,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538666310] [2021-03-10 23:47:43,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:47:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:47:44,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:47:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:47:44,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:47:44,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:44,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:44,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:47:44,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:47:44,810 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:47:44,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:47:44,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:44,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:44,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:47:44,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:47:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:44,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:47:44,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:47:44,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422936494] [2021-03-10 23:47:44,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:47:44,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:47:44,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:47:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:47:44,990 INFO L87 Difference]: Start difference. First operand 44703 states and 185455 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:46,087 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 23:47:46,720 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:47:48,481 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:47:48,793 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:47:49,361 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:47:50,800 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:47:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:47:52,606 INFO L93 Difference]: Finished difference Result 94568 states and 386059 transitions. [2021-03-10 23:47:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:47:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:47:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:47:52,945 INFO L225 Difference]: With dead ends: 94568 [2021-03-10 23:47:52,946 INFO L226 Difference]: Without dead ends: 94486 [2021-03-10 23:47:52,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 4772.1ms TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:47:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94486 states. [2021-03-10 23:47:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94486 to 44373. [2021-03-10 23:47:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44373 states, 44372 states have (on average 4.149869286937708) internal successors, (184138), 44372 states have internal predecessors, (184138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44373 states to 44373 states and 184138 transitions. [2021-03-10 23:47:54,551 INFO L78 Accepts]: Start accepts. Automaton has 44373 states and 184138 transitions. Word has length 39 [2021-03-10 23:47:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:47:54,551 INFO L480 AbstractCegarLoop]: Abstraction has 44373 states and 184138 transitions. [2021-03-10 23:47:54,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 44373 states and 184138 transitions. [2021-03-10 23:47:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:47:54,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:47:54,642 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:47:54,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-03-10 23:47:54,842 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:47:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:47:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1186962653, now seen corresponding path program 68 times [2021-03-10 23:47:54,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:47:54,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310046243] [2021-03-10 23:47:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:47:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:47:55,069 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:47:55,603 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:47:55,781 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:47:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:56,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310046243] [2021-03-10 23:47:56,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142942622] [2021-03-10 23:47:56,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:47:56,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:47:56,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:47:56,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:47:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:47:56,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:47:56,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:56,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:56,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:47:56,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:47:56,938 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:47:56,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:47:56,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:56,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:56,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:47:56,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:47:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:57,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:47:57,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:47:57,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097159932] [2021-03-10 23:47:57,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:47:57,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:47:57,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:47:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:47:57,120 INFO L87 Difference]: Start difference. First operand 44373 states and 184138 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:58,301 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:47:59,449 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 23:48:02,071 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:48:03,425 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:48:03,679 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 23:48:03,912 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:48:04,294 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:48:04,576 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:48:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:48:07,310 INFO L93 Difference]: Finished difference Result 110498 states and 449465 transitions. [2021-03-10 23:48:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:48:07,314 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:48:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:48:07,754 INFO L225 Difference]: With dead ends: 110498 [2021-03-10 23:48:07,754 INFO L226 Difference]: Without dead ends: 110362 [2021-03-10 23:48:07,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 6068.4ms TimeCoverageRelationStatistics Valid=586, Invalid=3074, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:48:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110362 states. [2021-03-10 23:48:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110362 to 44166. [2021-03-10 23:48:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44166 states, 44165 states have (on average 4.151590626061361) internal successors, (183355), 44165 states have internal predecessors, (183355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44166 states to 44166 states and 183355 transitions. [2021-03-10 23:48:09,650 INFO L78 Accepts]: Start accepts. Automaton has 44166 states and 183355 transitions. Word has length 39 [2021-03-10 23:48:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:48:09,650 INFO L480 AbstractCegarLoop]: Abstraction has 44166 states and 183355 transitions. [2021-03-10 23:48:09,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 44166 states and 183355 transitions. [2021-03-10 23:48:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:48:09,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:48:09,744 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:48:09,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:48:09,945 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:48:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:48:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -303471491, now seen corresponding path program 69 times [2021-03-10 23:48:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:48:09,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851314373] [2021-03-10 23:48:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:48:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:48:10,190 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:48:10,774 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:48:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:11,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851314373] [2021-03-10 23:48:11,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929719539] [2021-03-10 23:48:11,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:48:11,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:48:11,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:48:11,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:48:11,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:48:12,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:12,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-03-10 23:48:12,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:12,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:12,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:48:12,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:60 [2021-03-10 23:48:12,583 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:48:12,823 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_34], 3=[v_prenex_32]} [2021-03-10 23:48:12,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-03-10 23:48:12,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:48:13,018 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 23:48:13,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:13,459 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-03-10 23:48:13,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:13,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2021-03-10 23:48:13,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:13,655 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:48:13,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:13,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:13,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-03-10 23:48:13,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:13,902 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:48:13,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:13,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-03-10 23:48:13,960 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:163, output treesize:157 [2021-03-10 23:48:14,270 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:48:14,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:14,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:48:14,612 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:48:14,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:14,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:48:14,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:37 [2021-03-10 23:48:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:15,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:48:15,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 23:48:15,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868632415] [2021-03-10 23:48:15,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:48:15,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:48:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:48:15,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:48:15,016 INFO L87 Difference]: Start difference. First operand 44166 states and 183355 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:16,800 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2021-03-10 23:48:17,401 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-03-10 23:48:17,646 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2021-03-10 23:48:18,036 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 23:48:18,393 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-10 23:48:18,838 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-10 23:48:19,527 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-03-10 23:48:19,863 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 23:48:20,238 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 23:48:20,544 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-03-10 23:48:20,896 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-03-10 23:48:21,435 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-10 23:48:21,778 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:48:22,316 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-03-10 23:48:22,796 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-10 23:48:23,183 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 23:48:23,474 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-03-10 23:48:24,005 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2021-03-10 23:48:24,216 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-10 23:48:25,217 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-03-10 23:48:25,611 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:48:26,024 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:48:26,332 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:48:26,585 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:48:27,025 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 23:48:27,388 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 23:48:27,794 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-03-10 23:48:28,297 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-03-10 23:48:29,036 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 23:48:29,509 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-03-10 23:48:30,049 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 23:48:30,296 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 23:48:30,536 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 23:48:30,885 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-03-10 23:48:31,479 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 23:48:31,903 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 23:48:32,330 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-10 23:48:32,615 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:48:33,188 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:48:33,502 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 23:48:33,921 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 23:48:34,298 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-03-10 23:48:34,613 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:48:34,905 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 23:48:35,201 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 23:48:35,516 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 23:48:35,871 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-03-10 23:48:36,318 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-03-10 23:48:36,728 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-03-10 23:48:37,420 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 23:48:37,781 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-03-10 23:48:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:48:38,497 INFO L93 Difference]: Finished difference Result 97962 states and 396043 transitions. [2021-03-10 23:48:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-03-10 23:48:38,499 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:48:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:48:38,795 INFO L225 Difference]: With dead ends: 97962 [2021-03-10 23:48:38,796 INFO L226 Difference]: Without dead ends: 97636 [2021-03-10 23:48:38,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 20584.0ms TimeCoverageRelationStatistics Valid=1729, Invalid=8171, Unknown=0, NotChecked=0, Total=9900 [2021-03-10 23:48:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97636 states. [2021-03-10 23:48:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97636 to 44112. [2021-03-10 23:48:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44112 states, 44111 states have (on average 4.152048241935118) internal successors, (183151), 44111 states have internal predecessors, (183151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44112 states to 44112 states and 183151 transitions. [2021-03-10 23:48:40,419 INFO L78 Accepts]: Start accepts. Automaton has 44112 states and 183151 transitions. Word has length 39 [2021-03-10 23:48:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:48:40,419 INFO L480 AbstractCegarLoop]: Abstraction has 44112 states and 183151 transitions. [2021-03-10 23:48:40,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 44112 states and 183151 transitions. [2021-03-10 23:48:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:48:40,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:48:40,505 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:48:40,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:48:40,719 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:48:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:48:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2063765095, now seen corresponding path program 70 times [2021-03-10 23:48:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:48:40,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918330193] [2021-03-10 23:48:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:48:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:48:41,421 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:48:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:41,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918330193] [2021-03-10 23:48:41,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762341851] [2021-03-10 23:48:41,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:48:41,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:48:41,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:48:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:48:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:48:42,404 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 37 treesize of output 29 [2021-03-10 23:48:42,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:42,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:42,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:48:42,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-03-10 23:48:42,915 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:48:42,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:48:42,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:42,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:42,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:48:42,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:48:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:43,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:48:43,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:48:43,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18210577] [2021-03-10 23:48:43,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:48:43,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:48:43,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:48:43,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:48:43,079 INFO L87 Difference]: Start difference. First operand 44112 states and 183151 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:47,290 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 23:48:48,158 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 23:48:48,476 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 23:48:48,729 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-03-10 23:48:49,413 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:48:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:48:51,029 INFO L93 Difference]: Finished difference Result 113548 states and 462370 transitions. [2021-03-10 23:48:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:48:51,033 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:48:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:48:51,429 INFO L225 Difference]: With dead ends: 113548 [2021-03-10 23:48:51,429 INFO L226 Difference]: Without dead ends: 113412 [2021-03-10 23:48:51,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 5238.4ms TimeCoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:48:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113412 states. [2021-03-10 23:48:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113412 to 44356. [2021-03-10 23:48:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44356 states, 44355 states have (on average 4.152654717619209) internal successors, (184191), 44355 states have internal predecessors, (184191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44356 states to 44356 states and 184191 transitions. [2021-03-10 23:48:53,147 INFO L78 Accepts]: Start accepts. Automaton has 44356 states and 184191 transitions. Word has length 39 [2021-03-10 23:48:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:48:53,148 INFO L480 AbstractCegarLoop]: Abstraction has 44356 states and 184191 transitions. [2021-03-10 23:48:53,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 44356 states and 184191 transitions. [2021-03-10 23:48:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:48:53,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:48:53,234 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:48:53,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:48:53,434 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:48:53,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:48:53,435 INFO L82 PathProgramCache]: Analyzing trace with hash 907711723, now seen corresponding path program 71 times [2021-03-10 23:48:53,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:48:53,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447532807] [2021-03-10 23:48:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:48:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:48:53,670 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:48:54,148 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:48:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:54,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447532807] [2021-03-10 23:48:54,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584170069] [2021-03-10 23:48:54,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:48:54,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:48:54,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:48:54,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:48:54,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:48:56,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:56,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:56,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:56,072 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 59 [2021-03-10 23:48:56,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:56,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:56,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:48:56,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:83 [2021-03-10 23:48:56,589 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:48:57,011 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_42], 3=[q2], 6=[v_prenex_44]} [2021-03-10 23:48:57,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 23:48:57,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:57,142 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:48:57,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:57,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:57,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:57,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 [2021-03-10 23:48:57,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:57,301 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:48:57,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:57,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:57,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:57,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 55 [2021-03-10 23:48:57,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 23:48:57,609 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-10 23:48:57,611 INFO L628 ElimStorePlain]: treesize reduction 35, result has 70.6 percent of original size [2021-03-10 23:48:57,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:48:57,621 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 9 variables, input treesize:150, output treesize:57 [2021-03-10 23:48:57,814 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:48:57,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:57,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:48:57,909 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:48:57,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:58,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:48:58,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:63 [2021-03-10 23:48:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:58,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:48:58,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:48:58,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322695598] [2021-03-10 23:48:58,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:48:58,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:48:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:48:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:48:58,367 INFO L87 Difference]: Start difference. First operand 44356 states and 184191 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:58,666 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 23:48:58,908 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:48:59,187 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 23:48:59,473 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 23:49:00,100 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2021-03-10 23:49:00,375 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:49:00,661 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:49:00,970 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-10 23:49:01,285 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:49:01,587 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:49:01,902 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:49:02,429 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-03-10 23:49:02,864 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-03-10 23:49:03,117 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 23:49:03,829 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 23:49:04,136 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-03-10 23:49:04,547 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-03-10 23:49:04,821 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-10 23:49:05,385 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-10 23:49:05,795 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:49:06,156 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:49:06,498 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-03-10 23:49:06,883 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2021-03-10 23:49:07,308 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-03-10 23:49:07,572 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-03-10 23:49:07,921 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-03-10 23:49:08,224 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:49:08,454 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 23:49:08,638 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:49:08,960 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:49:09,574 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-03-10 23:49:10,262 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-10 23:49:10,543 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-03-10 23:49:10,862 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-10 23:49:11,356 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-03-10 23:49:12,021 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-03-10 23:49:12,280 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:49:12,946 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-10 23:49:13,778 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-03-10 23:49:14,111 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:49:14,558 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-03-10 23:49:15,028 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-03-10 23:49:15,422 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-10 23:49:15,841 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 23:49:16,254 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 23:49:16,670 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:49:17,327 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-10 23:49:17,625 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2021-03-10 23:49:18,100 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-10 23:49:18,493 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 23:49:18,833 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-10 23:49:19,160 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:49:19,611 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-03-10 23:49:20,258 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-03-10 23:49:20,516 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 23:49:21,089 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 23:49:21,931 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-03-10 23:49:22,303 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-10 23:49:22,627 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-03-10 23:49:22,814 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:49:23,245 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:49:23,552 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:49:23,776 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:49:24,107 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:49:24,715 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-10 23:49:25,161 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 23:49:25,597 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 23:49:25,947 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:49:26,262 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-03-10 23:49:26,586 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-03-10 23:49:27,080 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 23:49:27,275 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-03-10 23:49:27,940 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:49:28,378 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-10 23:49:28,752 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:49:29,407 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2021-03-10 23:49:29,933 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 23:49:30,244 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 23:49:30,526 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-03-10 23:49:30,900 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-03-10 23:49:31,105 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:49:31,577 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 23:49:31,929 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 23:49:32,097 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:49:32,372 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:49:32,786 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 23:49:33,094 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:49:33,467 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 23:49:34,010 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 23:49:34,246 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:49:34,573 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-10 23:49:34,919 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-03-10 23:49:35,331 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2021-03-10 23:49:35,701 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 23:49:36,038 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-03-10 23:49:36,406 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-03-10 23:49:36,655 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:49:36,975 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:49:37,241 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-10 23:49:37,550 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-10 23:49:37,951 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-03-10 23:49:38,357 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:49:38,677 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 23:49:39,033 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:49:39,514 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-03-10 23:49:39,920 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-10 23:49:40,330 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 23:49:40,584 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-03-10 23:49:40,799 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 23:49:41,225 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-03-10 23:49:41,742 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:49:42,108 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:49:42,778 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-10 23:49:43,272 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-03-10 23:49:43,908 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-03-10 23:49:44,497 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-03-10 23:49:44,894 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 23:49:45,166 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-03-10 23:49:45,569 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:49:45,941 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:49:46,421 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-10 23:49:46,646 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-10 23:49:46,938 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 23:49:47,355 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-03-10 23:49:47,599 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-03-10 23:49:48,061 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-10 23:49:48,461 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 23:49:48,944 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-03-10 23:49:49,402 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 23:49:49,750 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:49:50,147 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:49:50,429 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-10 23:49:50,724 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-10 23:49:51,355 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:49:51,726 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 23:49:52,839 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-03-10 23:49:53,286 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-03-10 23:49:53,911 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-03-10 23:49:54,343 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-03-10 23:49:54,641 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 23:49:54,863 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:49:55,258 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:49:56,048 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-03-10 23:49:56,316 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-03-10 23:49:56,589 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:49:57,397 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-03-10 23:49:57,922 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-03-10 23:49:58,347 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:49:58,705 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:49:59,090 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 23:50:00,205 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-03-10 23:50:00,957 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-03-10 23:50:01,888 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-03-10 23:50:02,538 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 23:50:03,678 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-03-10 23:50:03,999 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:50:04,560 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:50:05,212 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 23:50:05,744 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:50:06,319 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:50:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:50:07,329 INFO L93 Difference]: Finished difference Result 138268 states and 559081 transitions. [2021-03-10 23:50:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-03-10 23:50:07,332 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:50:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:50:07,819 INFO L225 Difference]: With dead ends: 138268 [2021-03-10 23:50:07,819 INFO L226 Difference]: Without dead ends: 137933 [2021-03-10 23:50:07,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18980 ImplicationChecksByTransitivity, 61032.5ms TimeCoverageRelationStatistics Valid=6152, Invalid=39004, Unknown=0, NotChecked=0, Total=45156 [2021-03-10 23:50:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137933 states. [2021-03-10 23:50:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137933 to 44934. [2021-03-10 23:50:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44934 states, 44933 states have (on average 4.151336434246545) internal successors, (186532), 44933 states have internal predecessors, (186532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44934 states to 44934 states and 186532 transitions. [2021-03-10 23:50:10,102 INFO L78 Accepts]: Start accepts. Automaton has 44934 states and 186532 transitions. Word has length 39 [2021-03-10 23:50:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:50:10,102 INFO L480 AbstractCegarLoop]: Abstraction has 44934 states and 186532 transitions. [2021-03-10 23:50:10,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 44934 states and 186532 transitions. [2021-03-10 23:50:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:50:10,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:50:10,809 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:50:11,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-03-10 23:50:11,011 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:50:11,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:50:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1656807999, now seen corresponding path program 72 times [2021-03-10 23:50:11,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:50:11,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179874095] [2021-03-10 23:50:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:50:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:11,266 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:50:11,940 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:50:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:12,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179874095] [2021-03-10 23:50:12,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501077726] [2021-03-10 23:50:12,454 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 [2021-03-10 23:50:12,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:50:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:50:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:50:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:50:13,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:13,647 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-03-10 23:50:13,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:13,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:13,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:50:13,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:62 [2021-03-10 23:50:15,169 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 23:50:16,194 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-03-10 23:50:16,504 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_58], 3=[q2, v_prenex_57]} [2021-03-10 23:50:16,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:16,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-03-10 23:50:16,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:50:16,743 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 23:50:16,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:16,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:16,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:16,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 [2021-03-10 23:50:16,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:17,053 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 23:50:17,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:17,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:17,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:17,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-03-10 23:50:17,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:17,397 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:50:17,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:17,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-03-10 23:50:17,517 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:154, output treesize:78 [2021-03-10 23:50:17,887 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:50:18,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:18,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:50:18,267 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:50:18,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:18,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:50:18,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-03-10 23:50:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:18,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:50:18,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 23:50:18,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457114052] [2021-03-10 23:50:18,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:50:18,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:50:18,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:50:18,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:50:18,531 INFO L87 Difference]: Start difference. First operand 44934 states and 186532 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:19,124 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:50:19,499 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 23:50:19,963 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:50:20,736 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 23:50:21,087 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 23:50:21,486 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 23:50:22,147 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 23:50:23,025 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-03-10 23:50:23,966 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-10 23:50:24,334 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-03-10 23:50:24,918 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-03-10 23:50:25,209 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:50:25,983 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 23:50:26,595 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-03-10 23:50:27,643 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 23:50:27,971 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 23:50:28,425 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 23:50:29,338 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-03-10 23:50:29,781 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:50:30,121 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 23:50:30,542 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-03-10 23:50:30,888 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:50:31,377 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:50:32,070 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-03-10 23:50:33,002 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 23:50:33,914 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-03-10 23:50:34,428 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 23:50:34,795 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-10 23:50:35,105 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:50:35,732 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-03-10 23:50:37,106 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:50:37,945 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-03-10 23:50:38,462 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 23:50:38,989 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-03-10 23:50:39,782 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-03-10 23:50:40,136 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:50:40,763 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:50:41,306 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:50:42,249 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-03-10 23:50:43,011 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 23:50:43,406 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:50:43,758 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:50:44,323 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-10 23:50:45,219 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-03-10 23:50:45,859 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-03-10 23:50:46,685 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-03-10 23:50:47,404 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 23:50:47,759 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-10 23:50:48,422 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 23:50:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:50:49,446 INFO L93 Difference]: Finished difference Result 93005 states and 377445 transitions. [2021-03-10 23:50:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 23:50:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:50:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:50:49,765 INFO L225 Difference]: With dead ends: 93005 [2021-03-10 23:50:49,766 INFO L226 Difference]: Without dead ends: 92966 [2021-03-10 23:50:49,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 24710.7ms TimeCoverageRelationStatistics Valid=1153, Invalid=6503, Unknown=0, NotChecked=0, Total=7656 [2021-03-10 23:50:49,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92966 states. [2021-03-10 23:50:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92966 to 44692. [2021-03-10 23:50:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44692 states, 44691 states have (on average 4.15067910765031) internal successors, (185498), 44691 states have internal predecessors, (185498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44692 states to 44692 states and 185498 transitions. [2021-03-10 23:50:51,855 INFO L78 Accepts]: Start accepts. Automaton has 44692 states and 185498 transitions. Word has length 39 [2021-03-10 23:50:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:50:51,855 INFO L480 AbstractCegarLoop]: Abstraction has 44692 states and 185498 transitions. [2021-03-10 23:50:51,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 44692 states and 185498 transitions. [2021-03-10 23:50:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:50:51,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:50:51,952 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:50:52,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:50:52,153 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:50:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:50:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash -388199381, now seen corresponding path program 73 times [2021-03-10 23:50:52,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:50:52,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944898542] [2021-03-10 23:50:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:50:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:52,309 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 23:50:52,462 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:50:53,168 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:50:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:53,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944898542] [2021-03-10 23:50:53,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255361235] [2021-03-10 23:50:53,718 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 [2021-03-10 23:50:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:53,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:50:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:50:54,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:50:54,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:54,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:54,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:50:54,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-03-10 23:50:54,932 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:50:54,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-03-10 23:50:54,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:54,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:54,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:50:54,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-03-10 23:50:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:55,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:50:55,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:50:55,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757627273] [2021-03-10 23:50:55,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:50:55,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:50:55,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:50:55,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:50:55,305 INFO L87 Difference]: Start difference. First operand 44692 states and 185498 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:56,905 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 23:50:57,287 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:50:57,625 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:50:58,961 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:50:59,477 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 23:51:00,384 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:51:01,186 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 23:51:01,561 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 23:51:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:51:04,057 INFO L93 Difference]: Finished difference Result 83387 states and 341559 transitions. [2021-03-10 23:51:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:51:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:51:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:51:04,323 INFO L225 Difference]: With dead ends: 83387 [2021-03-10 23:51:04,324 INFO L226 Difference]: Without dead ends: 83297 [2021-03-10 23:51:04,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5388.5ms TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:51:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83297 states. [2021-03-10 23:51:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83297 to 44780. [2021-03-10 23:51:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44780 states, 44779 states have (on average 4.151276267893432) internal successors, (185890), 44779 states have internal predecessors, (185890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44780 states to 44780 states and 185890 transitions. [2021-03-10 23:51:05,748 INFO L78 Accepts]: Start accepts. Automaton has 44780 states and 185890 transitions. Word has length 39 [2021-03-10 23:51:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:51:05,748 INFO L480 AbstractCegarLoop]: Abstraction has 44780 states and 185890 transitions. [2021-03-10 23:51:05,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 44780 states and 185890 transitions. [2021-03-10 23:51:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:51:05,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:51:05,835 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:51:06,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-03-10 23:51:06,036 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:51:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:51:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1768989747, now seen corresponding path program 74 times [2021-03-10 23:51:06,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:51:06,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114841567] [2021-03-10 23:51:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:51:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:06,184 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 23:51:06,359 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:51:07,131 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:51:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:07,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114841567] [2021-03-10 23:51:07,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759204736] [2021-03-10 23:51:07,632 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 [2021-03-10 23:51:07,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:51:07,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:51:07,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:51:07,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:51:08,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:51:08,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:08,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:08,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:08,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-03-10 23:51:08,823 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:51:08,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:51:08,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:08,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:08,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:08,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:51:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:09,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:51:09,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:51:09,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14764701] [2021-03-10 23:51:09,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:51:09,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:51:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:51:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:51:09,060 INFO L87 Difference]: Start difference. First operand 44780 states and 185890 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:09,267 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:51:09,469 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:51:09,707 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:51:11,528 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:51:11,821 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:51:12,261 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:51:12,891 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:51:13,110 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:51:13,487 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:51:14,626 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:51:15,193 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 23:51:15,586 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:51:16,365 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:51:16,959 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:51:17,745 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 23:51:18,166 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 23:51:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:51:22,030 INFO L93 Difference]: Finished difference Result 125210 states and 508316 transitions. [2021-03-10 23:51:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:51:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:51:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:51:22,578 INFO L225 Difference]: With dead ends: 125210 [2021-03-10 23:51:22,578 INFO L226 Difference]: Without dead ends: 125128 [2021-03-10 23:51:22,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 8011.4ms TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:51:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125128 states. [2021-03-10 23:51:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125128 to 44284. [2021-03-10 23:51:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44284 states, 44283 states have (on average 4.152993247973263) internal successors, (183907), 44283 states have internal predecessors, (183907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44284 states to 44284 states and 183907 transitions. [2021-03-10 23:51:24,544 INFO L78 Accepts]: Start accepts. Automaton has 44284 states and 183907 transitions. Word has length 39 [2021-03-10 23:51:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:51:24,544 INFO L480 AbstractCegarLoop]: Abstraction has 44284 states and 183907 transitions. [2021-03-10 23:51:24,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 44284 states and 183907 transitions. [2021-03-10 23:51:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:51:24,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:51:24,631 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:51:24,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-03-10 23:51:24,832 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:51:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:51:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash -653921383, now seen corresponding path program 75 times [2021-03-10 23:51:24,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:51:24,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558605191] [2021-03-10 23:51:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:51:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:24,991 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 23:51:25,130 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:51:25,696 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:51:25,870 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:51:26,050 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 23:51:26,252 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:51:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558605191] [2021-03-10 23:51:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077520424] [2021-03-10 23:51:26,577 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 [2021-03-10 23:51:26,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:51:26,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:51:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:51:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:51:27,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:27,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:27,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-03-10 23:51:27,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:27,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:27,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:27,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-03-10 23:51:28,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:28,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-03-10 23:51:28,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:28,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:28,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:28,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:37 [2021-03-10 23:51:29,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:29,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:51:29,016 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:51:29,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:29,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:29,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-03-10 23:51:29,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:51:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-03-10 23:51:29,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:29,361 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:51:29,362 INFO L628 ElimStorePlain]: treesize reduction 54, result has 42.6 percent of original size [2021-03-10 23:51:29,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:51:29,369 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:111, output treesize:41 [2021-03-10 23:51:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:30,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:51:30,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-03-10 23:51:30,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939836167] [2021-03-10 23:51:30,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:51:30,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:51:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:51:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:51:30,531 INFO L87 Difference]: Start difference. First operand 44284 states and 183907 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:31,106 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:51:31,982 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:51:32,308 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:51:32,642 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:51:33,016 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2021-03-10 23:51:33,642 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 23:51:33,947 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:51:34,266 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:51:34,626 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-03-10 23:51:35,229 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-03-10 23:51:35,624 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-10 23:51:36,050 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-03-10 23:51:36,487 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-10 23:51:36,947 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:51:37,156 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:51:37,719 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 23:51:38,021 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-03-10 23:51:39,033 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:51:39,328 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-03-10 23:51:39,700 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:51:40,058 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 23:51:40,440 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-03-10 23:51:41,174 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 23:51:41,470 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 23:51:41,715 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:51:42,267 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:51:42,587 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2021-03-10 23:51:43,108 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:51:43,523 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-03-10 23:51:43,968 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 23:51:44,541 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:51:45,229 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-10 23:51:45,737 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:51:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:51:46,496 INFO L93 Difference]: Finished difference Result 73687 states and 299918 transitions. [2021-03-10 23:51:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:51:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:51:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:51:46,742 INFO L225 Difference]: With dead ends: 73687 [2021-03-10 23:51:46,742 INFO L226 Difference]: Without dead ends: 73523 [2021-03-10 23:51:46,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 14220.1ms TimeCoverageRelationStatistics Valid=849, Invalid=3311, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:51:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73523 states. [2021-03-10 23:51:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73523 to 44526. [2021-03-10 23:51:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44526 states, 44525 states have (on average 4.1495115103874225) internal successors, (184757), 44525 states have internal predecessors, (184757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44526 states to 44526 states and 184757 transitions. [2021-03-10 23:51:48,072 INFO L78 Accepts]: Start accepts. Automaton has 44526 states and 184757 transitions. Word has length 39 [2021-03-10 23:51:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:51:48,072 INFO L480 AbstractCegarLoop]: Abstraction has 44526 states and 184757 transitions. [2021-03-10 23:51:48,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:48,072 INFO L276 IsEmpty]: Start isEmpty. Operand 44526 states and 184757 transitions. [2021-03-10 23:51:48,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:51:48,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:51:48,159 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:51:48,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-03-10 23:51:48,368 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:51:48,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:51:48,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1959209003, now seen corresponding path program 76 times [2021-03-10 23:51:48,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:51:48,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824649156] [2021-03-10 23:51:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:51:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:48,639 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:51:49,211 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:51:49,388 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:51:49,573 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 23:51:49,784 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:51:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:50,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824649156] [2021-03-10 23:51:50,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780154047] [2021-03-10 23:51:50,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:51:50,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:51:50,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:51:50,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:51:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:51:51,135 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:51:51,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-03-10 23:51:51,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:51,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:51,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:51,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-03-10 23:51:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:51:51,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:51,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:51,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:51,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-03-10 23:51:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:51,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:51:51,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:51:51,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870352344] [2021-03-10 23:51:51,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:51:51,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:51:51,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:51:51,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:51:51,715 INFO L87 Difference]: Start difference. First operand 44526 states and 184757 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:54,088 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:51:54,468 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:51:54,801 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:51:55,260 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:51:55,540 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:51:55,774 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:51:56,799 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:51:57,203 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:52:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:52:00,577 INFO L93 Difference]: Finished difference Result 87324 states and 356111 transitions. [2021-03-10 23:52:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:52:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:52:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:52:00,852 INFO L225 Difference]: With dead ends: 87324 [2021-03-10 23:52:00,852 INFO L226 Difference]: Without dead ends: 87140 [2021-03-10 23:52:00,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 6170.9ms TimeCoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:52:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87140 states. [2021-03-10 23:52:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87140 to 44336. [2021-03-10 23:52:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44336 states, 44335 states have (on average 4.152227359873689) internal successors, (184089), 44335 states have internal predecessors, (184089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44336 states to 44336 states and 184089 transitions. [2021-03-10 23:52:02,396 INFO L78 Accepts]: Start accepts. Automaton has 44336 states and 184089 transitions. Word has length 39 [2021-03-10 23:52:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:52:02,397 INFO L480 AbstractCegarLoop]: Abstraction has 44336 states and 184089 transitions. [2021-03-10 23:52:02,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 44336 states and 184089 transitions. [2021-03-10 23:52:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:52:02,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:52:02,479 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:52:02,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:52:02,680 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:52:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:52:02,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1495860655, now seen corresponding path program 77 times [2021-03-10 23:52:02,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:52:02,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526499242] [2021-03-10 23:52:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:52:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:52:02,930 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:52:03,449 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:52:04,170 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:52:04,337 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:52:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:52:04,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526499242] [2021-03-10 23:52:04,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132763165] [2021-03-10 23:52:04,614 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 [2021-03-10 23:52:04,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:52:04,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:52:04,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:52:04,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:52:05,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:05,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 49 [2021-03-10 23:52:05,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:52:05,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:06,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:52:06,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:55 [2021-03-10 23:52:06,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 23:52:06,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:52:06,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:06,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:52:06,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-03-10 23:52:06,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:52:06,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:52:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:52:06,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:06,798 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 20 treesize of output 39 [2021-03-10 23:52:06,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:52:06,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:06,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:52:06,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-03-10 23:52:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:52:07,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:52:07,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:52:07,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043243750] [2021-03-10 23:52:07,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:52:07,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:52:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:52:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:52:07,135 INFO L87 Difference]: Start difference. First operand 44336 states and 184089 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:08,771 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:52:09,276 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 23:52:09,599 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:52:10,451 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-10 23:52:11,067 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:52:11,457 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-10 23:52:11,835 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-10 23:52:12,184 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:52:12,450 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:52:12,744 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:52:13,034 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:52:13,382 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 23:52:13,984 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-10 23:52:14,408 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:52:15,231 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 23:52:15,680 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:52:15,980 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-10 23:52:16,496 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 23:52:17,630 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 23:52:18,617 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 23:52:19,162 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:52:19,901 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:52:20,474 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:52:20,876 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 23:52:21,456 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 23:52:21,730 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:52:22,201 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 23:52:22,714 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:52:22,962 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 23:52:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:52:23,515 INFO L93 Difference]: Finished difference Result 78146 states and 319995 transitions. [2021-03-10 23:52:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:52:23,519 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:52:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:52:23,732 INFO L225 Difference]: With dead ends: 78146 [2021-03-10 23:52:23,733 INFO L226 Difference]: Without dead ends: 77925 [2021-03-10 23:52:23,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 13301.1ms TimeCoverageRelationStatistics Valid=809, Invalid=4447, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:52:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77925 states. [2021-03-10 23:52:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77925 to 44735. [2021-03-10 23:52:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44735 states, 44734 states have (on average 4.147896454598292) internal successors, (185552), 44734 states have internal predecessors, (185552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44735 states to 44735 states and 185552 transitions. [2021-03-10 23:52:24,941 INFO L78 Accepts]: Start accepts. Automaton has 44735 states and 185552 transitions. Word has length 39 [2021-03-10 23:52:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:52:24,941 INFO L480 AbstractCegarLoop]: Abstraction has 44735 states and 185552 transitions. [2021-03-10 23:52:24,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 44735 states and 185552 transitions. [2021-03-10 23:52:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:52:25,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:52:25,021 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:52:25,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:52:25,222 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:52:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:52:25,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1406077505, now seen corresponding path program 78 times [2021-03-10 23:52:25,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:52:25,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796350142] [2021-03-10 23:52:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:52:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:52:25,473 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:52:25,991 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:52:26,156 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:52:26,403 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:52:26,596 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:52:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:52:26,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796350142] [2021-03-10 23:52:26,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187316335] [2021-03-10 23:52:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:52:26,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:52:26,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:52:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:52:26,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:52:27,838 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:52:28,430 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:52:28,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-10 23:52:28,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:52:28,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:28,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:52:28,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:36 [2021-03-10 23:52:28,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:28,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-03-10 23:52:28,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:52:28,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:28,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:52:28,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:44 [2021-03-10 23:52:30,526 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:52:30,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:52:30,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:52:30,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:52:30,903 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:52:30,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:30,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-03-10 23:52:30,961 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:52:31,114 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:52:31,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:31,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:52:31,132 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:67, output treesize:41 [2021-03-10 23:52:31,412 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:52:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:52:31,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:52:31,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:52:31,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021783172] [2021-03-10 23:52:31,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:52:31,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:52:31,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:52:31,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:52:31,734 INFO L87 Difference]: Start difference. First operand 44735 states and 185552 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:33,423 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:52:34,566 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-03-10 23:52:34,948 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:52:35,294 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2021-03-10 23:52:35,884 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 23:52:36,168 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:52:36,468 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:52:36,660 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:52:37,115 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-10 23:52:38,296 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 23:52:39,128 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 23:52:39,546 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:52:39,901 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:52:40,575 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:52:40,985 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 23:52:41,515 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 23:52:41,959 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 23:52:42,469 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 23:52:43,212 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 23:52:43,547 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-10 23:52:44,081 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:52:44,663 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:52:44,903 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:52:45,541 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:52:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:52:45,938 INFO L93 Difference]: Finished difference Result 85472 states and 347398 transitions. [2021-03-10 23:52:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:52:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:52:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:52:46,198 INFO L225 Difference]: With dead ends: 85472 [2021-03-10 23:52:46,199 INFO L226 Difference]: Without dead ends: 85269 [2021-03-10 23:52:46,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 11623.3ms TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:52:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85269 states. [2021-03-10 23:52:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85269 to 44522. [2021-03-10 23:52:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 4.150603086184048) internal successors, (184789), 44521 states have internal predecessors, (184789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 184789 transitions. [2021-03-10 23:52:47,549 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 184789 transitions. Word has length 39 [2021-03-10 23:52:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:52:47,549 INFO L480 AbstractCegarLoop]: Abstraction has 44522 states and 184789 transitions. [2021-03-10 23:52:47,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 184789 transitions. [2021-03-10 23:52:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:52:47,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:52:47,632 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:52:47,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-03-10 23:52:47,839 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:52:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:52:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1172159941, now seen corresponding path program 79 times [2021-03-10 23:52:47,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:52:47,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972014797] [2021-03-10 23:52:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:52:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:52:47,979 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 23:52:48,123 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:52:48,671 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:52:48,850 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:52:49,128 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:52:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:52:49,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972014797] [2021-03-10 23:52:49,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264509276] [2021-03-10 23:52:49,558 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 [2021-03-10 23:52:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:52:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:52:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:52:50,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-03-10 23:52:50,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:52:50,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:50,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:52:50,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:52:51,243 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-10 23:52:51,261 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:52:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:52:51,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:52:51,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:52:51,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:52:51,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:52:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:52:51,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:52:51,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:52:51,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137757770] [2021-03-10 23:52:51,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:52:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:52:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:52:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:52:51,552 INFO L87 Difference]: Start difference. First operand 44522 states and 184789 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:52:53,153 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:52:54,074 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 23:52:54,627 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:52:56,358 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:52:57,206 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:52:58,240 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:52:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:52:59,509 INFO L93 Difference]: Finished difference Result 91168 states and 372007 transitions. [2021-03-10 23:52:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:52:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:52:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:53:00,097 INFO L225 Difference]: With dead ends: 91168 [2021-03-10 23:53:00,097 INFO L226 Difference]: Without dead ends: 91016 [2021-03-10 23:53:00,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 6029.6ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:53:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91016 states. [2021-03-10 23:53:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91016 to 44584. [2021-03-10 23:53:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44584 states, 44583 states have (on average 4.15138057106969) internal successors, (185081), 44583 states have internal predecessors, (185081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:53:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44584 states to 44584 states and 185081 transitions. [2021-03-10 23:53:01,747 INFO L78 Accepts]: Start accepts. Automaton has 44584 states and 185081 transitions. Word has length 39 [2021-03-10 23:53:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:53:01,747 INFO L480 AbstractCegarLoop]: Abstraction has 44584 states and 185081 transitions. [2021-03-10 23:53:01,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:53:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 44584 states and 185081 transitions. [2021-03-10 23:53:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:53:01,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:53:01,865 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:53:02,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:53:02,083 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:53:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:53:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1376080687, now seen corresponding path program 80 times [2021-03-10 23:53:02,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:53:02,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117192842] [2021-03-10 23:53:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:53:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:53:02,278 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 23:53:02,483 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:53:03,076 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:53:03,274 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:53:03,536 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:53:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:53:03,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117192842] [2021-03-10 23:53:03,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989452925] [2021-03-10 23:53:03,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:53:03,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:53:03,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:53:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:53:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:53:05,102 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 37 treesize of output 29 [2021-03-10 23:53:05,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:53:05,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:53:05,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:53:05,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-03-10 23:53:05,297 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:53:05,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-03-10 23:53:05,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:53:05,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:53:05,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:53:05,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-03-10 23:53:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:53:05,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:53:05,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-03-10 23:53:05,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378194777] [2021-03-10 23:53:05,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:53:05,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:53:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:53:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:53:05,580 INFO L87 Difference]: Start difference. First operand 44584 states and 185081 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:53:06,520 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:53:07,486 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 23:53:07,902 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-03-10 23:53:09,338 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:53:09,792 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:53:10,858 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 23:53:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:53:12,230 INFO L93 Difference]: Finished difference Result 77677 states and 318224 transitions. [2021-03-10 23:53:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:53:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:53:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:53:12,474 INFO L225 Difference]: With dead ends: 77677 [2021-03-10 23:53:12,474 INFO L226 Difference]: Without dead ends: 77587 [2021-03-10 23:53:12,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 5291.6ms TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:53:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77587 states. [2021-03-10 23:53:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77587 to 44312. [2021-03-10 23:53:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44312 states, 44311 states have (on average 4.152580623321523) internal successors, (184005), 44311 states have internal predecessors, (184005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:53:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44312 states to 44312 states and 184005 transitions. [2021-03-10 23:53:13,837 INFO L78 Accepts]: Start accepts. Automaton has 44312 states and 184005 transitions. Word has length 39 [2021-03-10 23:53:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:53:13,837 INFO L480 AbstractCegarLoop]: Abstraction has 44312 states and 184005 transitions. [2021-03-10 23:53:13,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:53:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 44312 states and 184005 transitions. [2021-03-10 23:53:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:53:13,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:53:13,920 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:53:14,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:53:14,120 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:53:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:53:14,121 INFO L82 PathProgramCache]: Analyzing trace with hash 575171183, now seen corresponding path program 81 times [2021-03-10 23:53:14,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:53:14,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201359509] [2021-03-10 23:53:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:53:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:53:14,399 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:53:14,948 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:53:15,177 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:53:15,446 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:53:15,660 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:53:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:53:16,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201359509] [2021-03-10 23:53:16,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235440594] [2021-03-10 23:53:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:53:16,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:53:16,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:53:16,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:53:16,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:53:17,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:53:17,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:53:17,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-03-10 23:53:17,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:53:17,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:53:17,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:53:17,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-03-10 23:53:18,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:53:18,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-03-10 23:53:18,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:53:18,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:53:18,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:53:18,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-03-10 23:53:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:53:18,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-03-10 23:53:18,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:53:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:53:18,778 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-03-10 23:53:18,779 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-03-10 23:53:18,788 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:53:18,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:53:18,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-03-10 23:53:18,834 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:53:19,146 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:53:19,148 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-03-10 23:53:19,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:53:19,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:47 [2021-03-10 23:53:19,443 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:53:19,792 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-03-10 23:53:20,323 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-03-10 23:53:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:53:20,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:53:20,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-03-10 23:53:20,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668701967] [2021-03-10 23:53:20,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:53:20,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:53:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:53:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:53:20,481 INFO L87 Difference]: Start difference. First operand 44312 states and 184005 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:53:21,387 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:53:22,389 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 23:53:23,216 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:53:23,461 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:53:23,731 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:53:24,411 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-03-10 23:53:25,056 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-10 23:53:25,506 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 23:53:26,492 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-03-10 23:53:26,812 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2021-03-10 23:53:27,142 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:53:27,457 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:53:27,968 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 23:53:28,548 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-03-10 23:53:28,854 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-10 23:53:29,178 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-03-10 23:53:30,206 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-10 23:53:30,781 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:53:31,114 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:53:31,828 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-03-10 23:53:32,225 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:53:32,950 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-03-10 23:53:33,329 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 23:53:33,962 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 23:53:34,261 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:53:34,907 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 23:53:35,569 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-03-10 23:53:35,869 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 23:53:36,630 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-10 23:53:36,870 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:53:37,360 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 23:53:37,989 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-03-10 23:53:38,603 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-10 23:53:39,168 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 23:53:39,441 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:53:39,817 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:53:40,212 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-10 23:53:40,702 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 23:53:41,161 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:53:41,714 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 23:53:42,267 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 23:53:42,537 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:53:42,920 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:53:43,403 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-03-10 23:53:43,995 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 23:53:44,825 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-03-10 23:53:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:53:45,464 INFO L93 Difference]: Finished difference Result 70548 states and 287224 transitions. [2021-03-10 23:53:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 23:53:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:53:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-03-10 23:53:45,675 INFO L225 Difference]: With dead ends: 70548 [2021-03-10 23:53:45,675 INFO L226 Difference]: Without dead ends: 70400 [2021-03-10 23:53:45,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 22112.5ms TimeCoverageRelationStatistics Valid=908, Invalid=5734, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 23:53:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70400 states. [2021-03-10 23:53:45,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-03-10 23:53:45,961 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:53:45,964 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:53:45,964 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:53:45 BasicIcfg [2021-03-10 23:53:45,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:53:45,965 INFO L168 Benchmark]: Toolchain (without parser) took 764853.01 ms. Allocated memory was 255.9 MB in the beginning and 15.6 GB in the end (delta: 15.4 GB). Free memory was 236.4 MB in the beginning and 13.6 GB in the end (delta: -13.3 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. [2021-03-10 23:53:45,965 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:53:45,965 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.71 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:53:45,965 INFO L168 Benchmark]: Boogie Preprocessor took 16.97 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:53:45,965 INFO L168 Benchmark]: RCFGBuilder took 301.83 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 234.2 MB in the end (delta: -879.6 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-10 23:53:45,965 INFO L168 Benchmark]: TraceAbstraction took 764505.85 ms. Allocated memory was 255.9 MB in the beginning and 15.6 GB in the end (delta: 15.4 GB). Free memory was 233.5 MB in the beginning and 13.6 GB in the end (delta: -13.4 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. [2021-03-10 23:53:45,965 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 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.71 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.97 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 301.83 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 234.2 MB in the end (delta: -879.6 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 764505.85 ms. Allocated memory was 255.9 MB in the beginning and 15.6 GB in the end (delta: 15.4 GB). Free memory was 233.5 MB in the beginning and 13.6 GB in the end (delta: -13.4 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 82). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 764426.5ms, OverallIterations: 90, TraceHistogramMax: 2, EmptinessCheckTime: 6601.2ms, AutomataDifference: 508175.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6428 SDtfs, 41370 SDslu, 69731 SDs, 0 SdLazy, 126641 SolverSat, 8195 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81679.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6371 GetRequests, 2248 SyntacticMatches, 88 SemanticMatches, 4035 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87866 ImplicationChecksByTransitivity, 365410.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44934occurred in iteration=80, InterpolantAutomatonStates: 3083, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 96293.2ms AutomataMinimizationTime, 90 MinimizatonAttempts, 2882822 StatesRemovedByMinimization, 89 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 516.6ms SsaConstructionTime, 1831.6ms SatisfiabilityAnalysisTime, 131407.8ms InterpolantComputationTime, 6367 NumberOfCodeBlocks, 6363 NumberOfCodeBlocksAsserted, 313 NumberOfCheckSat, 6193 ConstructedInterpolants, 231 QuantifiedInterpolants, 147057 SizeOfPredicates, 601 NumberOfNonLiveVariables, 9401 ConjunctsInSsa, 2965 ConjunctsInUnsatCore, 174 InterpolantComputations, 8 PerfectInterpolantSequences, 227/2604 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