/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/dec-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:23:20,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:23:20,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:23:20,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:23:20,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:23:20,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:23:20,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:23:20,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:23:20,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:23:20,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:23:20,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:23:20,181 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:23:20,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:23:20,181 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:23:20,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:23:20,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:23:20,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:23:20,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:23:20,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:23:20,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:23:20,183 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:23:20,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:23:20,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:23:20,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:23:20,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:23:20,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:23:20,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:23:20,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:23:20,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:23:20,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:23:20,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:23:20,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:23:20,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:23:20,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:23:20,184 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:23:20,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:23:20,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:23:20,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:23:20,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:23:20,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:23:20,454 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:23:20,454 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:23:20,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl [2021-06-05 06:23:20,455 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl' [2021-06-05 06:23:20,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:23:20,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:23:20,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:23:20,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:23:20,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:23:20,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:23:20,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:23:20,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:23:20,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:23:20,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... [2021-06-05 06:23:20,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:23:20,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:23:20,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:23:20,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:23:20,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:23:20,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:23:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:23:20,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:23:20,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:23:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:23:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:23:20,578 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:23:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:23:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:23:20,579 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:23:20,733 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:23:20,734 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:23:20,736 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:23:20 BoogieIcfgContainer [2021-06-05 06:23:20,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:23:20,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:23:20,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:23:20,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:23:20,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:23:20" (1/2) ... [2021-06-05 06:23:20,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9e88a6 and model type dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:23:20, skipping insertion in model container [2021-06-05 06:23:20,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:23:20" (2/2) ... [2021-06-05 06:23:20,759 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq-array.wvr.bpl [2021-06-05 06:23:20,763 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:23:20,763 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:23:20,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:23:20,764 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:23:20,798 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 06:23:20,813 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 06:23:20,831 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:23:20,831 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:23:20,831 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:23:20,831 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:23:20,831 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:23:20,831 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:23:20,832 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:23:20,832 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:23:20,841 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-05 06:23:20,850 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 06:23:20,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:20,856 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:20,856 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-05 06:23:20,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:20,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159012555] [2021-06-05 06:23:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:20,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:20,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159012555] [2021-06-05 06:23:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159012555] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:23:20,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:23:20,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:23:20,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710219509] [2021-06-05 06:23:20,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:23:20,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:23:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:23:20,958 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:20,973 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-05 06:23:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:23:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 06:23:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:20,980 INFO L225 Difference]: With dead ends: 104 [2021-06-05 06:23:20,980 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 06:23:20,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:23:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 06:23:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-05 06:23:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 06:23:21,005 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-05 06:23:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:21,005 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 06:23:21,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 06:23:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:23:21,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:21,006 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:21,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:23:21,006 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-05 06:23:21,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:21,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8602318] [2021-06-05 06:23:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:21,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8602318] [2021-06-05 06:23:21,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8602318] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:23:21,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:23:21,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:23:21,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056145249] [2021-06-05 06:23:21,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:23:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:23:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:23:21,046 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:21,065 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-05 06:23:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:23:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:23:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:21,066 INFO L225 Difference]: With dead ends: 91 [2021-06-05 06:23:21,066 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 06:23:21,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:23:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 06:23:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 06:23:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-05 06:23:21,073 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-05 06:23:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:21,073 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-05 06:23:21,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-05 06:23:21,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:23:21,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:21,074 INFO L521 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] [2021-06-05 06:23:21,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:23:21,075 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:21,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:21,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-05 06:23:21,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:21,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441367791] [2021-06-05 06:23:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:21,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441367791] [2021-06-05 06:23:21,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441367791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139309081] [2021-06-05 06:23:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:21,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:23:21,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:21,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 06:23:21,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:21,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 06:23:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:23:21,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:21,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-05 06:23:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139309081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:21,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 06:23:21,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238770378] [2021-06-05 06:23:21,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:23:21,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:23:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:23:21,463 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:21,613 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-05 06:23:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:23:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 06:23:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:21,619 INFO L225 Difference]: With dead ends: 154 [2021-06-05 06:23:21,619 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 06:23:21,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:23:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 06:23:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-05 06:23:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-05 06:23:21,634 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-05 06:23:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:21,634 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-05 06:23:21,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-05 06:23:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:23:21,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:21,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:21,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 06:23:21,836 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-05 06:23:21,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:21,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168976362] [2021-06-05 06:23:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:21,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168976362] [2021-06-05 06:23:21,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168976362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825182416] [2021-06-05 06:23:21,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:21,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:21,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:21,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:23:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825182416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:21,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 06:23:21,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815624752] [2021-06-05 06:23:21,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:23:21,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:23:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:23:21,992 INFO L87 Difference]: Start difference. First operand 115 states and 233 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) [2021-06-05 06:23:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:22,056 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-05 06:23:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:23:22,057 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 27 [2021-06-05 06:23:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:22,058 INFO L225 Difference]: With dead ends: 284 [2021-06-05 06:23:22,058 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 06:23:22,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:23:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 06:23:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-05 06:23:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-05 06:23:22,076 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-05 06:23:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:22,076 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-05 06:23:22,077 INFO L483 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) [2021-06-05 06:23:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-05 06:23:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:23:22,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:22,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:22,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:22,279 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:22,279 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-05 06:23:22,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:22,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672095410] [2021-06-05 06:23:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:22,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672095410] [2021-06-05 06:23:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672095410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817811883] [2021-06-05 06:23:22,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:22,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:23:22,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:22,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:23:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:22,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:22,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-06-05 06:23:22,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:22,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:22,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:22,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-05 06:23:22,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:22,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2021-06-05 06:23:23,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:23,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:23,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:23,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-05 06:23:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:23,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817811883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:23,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:23,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 06:23:23,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486022759] [2021-06-05 06:23:23,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:23:23,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:23:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:23:23,141 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:24,859 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-05 06:23:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:23:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:23:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:24,864 INFO L225 Difference]: With dead ends: 650 [2021-06-05 06:23:24,865 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 06:23:24,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1362.8ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:23:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 06:23:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-05 06:23:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-05 06:23:24,874 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-05 06:23:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:24,874 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-05 06:23:24,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:24,874 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-05 06:23:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:23:24,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:24,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:25,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:25,085 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-05 06:23:25,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:25,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252661054] [2021-06-05 06:23:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:23:25,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:25,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252661054] [2021-06-05 06:23:25,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252661054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:25,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275749031] [2021-06-05 06:23:25,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:25,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:25,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:25,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:23:25,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:25,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 06:23:25,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:25,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,651 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. [2021-06-05 06:23:25,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 06:23:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:25,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 06:23:25,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:25,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:25,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 06:23:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:25,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275749031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:25,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:25,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 06:23:25,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475367128] [2021-06-05 06:23:25,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:25,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:25,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:25,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:25,749 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:26,404 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-05 06:23:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:23:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:23:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:26,411 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 06:23:26,411 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 06:23:26,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 588.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:23:26,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 06:23:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-05 06:23:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-05 06:23:26,421 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-05 06:23:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:26,421 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-05 06:23:26,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-05 06:23:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:23:26,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:26,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:26,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:26,637 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-05 06:23:26,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:26,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589860121] [2021-06-05 06:23:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:26,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589860121] [2021-06-05 06:23:26,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589860121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:26,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491047602] [2021-06-05 06:23:26,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:26,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:23:26,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:23:26,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:27,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:27,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 24 [2021-06-05 06:23:27,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:27,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:27,088 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. [2021-06-05 06:23:27,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 06:23:27,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:27,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:27,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 06:23:27,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:27,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:27,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:27,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 06:23:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:27,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491047602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:27,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:27,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 06:23:27,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553477384] [2021-06-05 06:23:27,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:23:27,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:27,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:23:27,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:23:27,207 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:27,941 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-05 06:23:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:23:27,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:23:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:27,945 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 06:23:27,945 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 06:23:27,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:23:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 06:23:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-05 06:23:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-05 06:23:27,954 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-05 06:23:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:27,955 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-05 06:23:27,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-05 06:23:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:23:27,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:27,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:28,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:23:28,174 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:28,175 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-05 06:23:28,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:28,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333903715] [2021-06-05 06:23:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:23:28,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:28,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333903715] [2021-06-05 06:23:28,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333903715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:28,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997036106] [2021-06-05 06:23:28,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:28,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:23:28,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:28,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:23:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:28,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:28,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 24 [2021-06-05 06:23:28,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:28,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:28,657 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. [2021-06-05 06:23:28,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 06:23:28,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:28,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:28,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:28,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 06:23:28,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:28,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:28,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:28,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 06:23:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:28,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997036106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:28,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:28,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 06:23:28,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016733547] [2021-06-05 06:23:28,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:28,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:28,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:28,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:28,729 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:23:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:29,222 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-06-05 06:23:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:23:29,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-06-05 06:23:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:29,226 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 06:23:29,226 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 06:23:29,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 462.5ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:23:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 06:23:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-06-05 06:23:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-06-05 06:23:29,235 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-06-05 06:23:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:29,236 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-06-05 06:23:29,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:23:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-06-05 06:23:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:23:29,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:29,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:29,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:29,453 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:29,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:29,453 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-05 06:23:29,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:29,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554811721] [2021-06-05 06:23:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:29,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:29,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554811721] [2021-06-05 06:23:29,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554811721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:29,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733953644] [2021-06-05 06:23:29,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:29,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:23:29,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:29,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:29,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 06:23:29,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:29,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:29,904 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. [2021-06-05 06:23:29,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 06:23:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:30,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:30,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:30,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 06:23:30,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:30,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:30,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:30,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 06:23:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:30,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733953644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:30,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:30,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 06:23:30,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798171191] [2021-06-05 06:23:30,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:23:30,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:30,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:23:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:23:30,021 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:30,517 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-06-05 06:23:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:23:30,517 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 06:23:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:30,520 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 06:23:30,520 INFO L226 Difference]: Without dead ends: 952 [2021-06-05 06:23:30,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:23:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-05 06:23:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-06-05 06:23:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-06-05 06:23:30,530 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-06-05 06:23:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:30,531 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-06-05 06:23:30,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-06-05 06:23:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:23:30,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:30,532 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:30,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:30,751 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-05 06:23:30,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:30,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197911330] [2021-06-05 06:23:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:30,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:30,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197911330] [2021-06-05 06:23:30,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197911330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:30,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618667657] [2021-06-05 06:23:30,795 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:30,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:23:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:30,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618667657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:30,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:30,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 06:23:30,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644912086] [2021-06-05 06:23:30,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:23:30,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:23:30,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:23:30,879 INFO L87 Difference]: Start difference. First operand 467 states and 1007 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:30,944 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-06-05 06:23:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:23:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 06:23:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:30,947 INFO L225 Difference]: With dead ends: 885 [2021-06-05 06:23:30,947 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 06:23:30,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:23:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 06:23:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-06-05 06:23:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-06-05 06:23:30,958 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-06-05 06:23:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:30,958 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-06-05 06:23:30,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-06-05 06:23:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:23:30,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:30,959 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:31,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 06:23:31,176 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-05 06:23:31,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:31,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865350857] [2021-06-05 06:23:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:31,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:31,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865350857] [2021-06-05 06:23:31,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865350857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:31,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607968157] [2021-06-05 06:23:31,523 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:31,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:23:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:23:31,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:31,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 06:23:31,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:31,883 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.3 percent of original size [2021-06-05 06:23:31,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:31,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:32 [2021-06-05 06:23:32,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:32,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:32,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:32,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:32,185 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 43 [2021-06-05 06:23:32,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:32,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:32,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:32,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 06:23:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:32,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607968157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:32,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:32,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 06:23:32,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727430929] [2021-06-05 06:23:32,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 06:23:32,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:32,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 06:23:32,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:23:32,294 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:36,038 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-05 06:23:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 06:23:36,039 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:23:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:36,046 INFO L225 Difference]: With dead ends: 2812 [2021-06-05 06:23:36,046 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 06:23:36,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 2891.9ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 06:23:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 06:23:36,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-05 06:23:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-05 06:23:36,066 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-05 06:23:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:36,066 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-05 06:23:36,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-05 06:23:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:23:36,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:36,068 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:36,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:36,282 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:36,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-05 06:23:36,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:36,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862162284] [2021-06-05 06:23:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:23:36,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:36,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862162284] [2021-06-05 06:23:36,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862162284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:36,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609501388] [2021-06-05 06:23:36,600 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:36,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:36,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:23:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:37,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 06:23:37,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,290 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 06:23:37,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:37,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 06:23:37,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 06:23:37,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 06:23:37,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-05 06:23:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:37,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609501388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:37,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:37,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 06:23:37,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816893668] [2021-06-05 06:23:37,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:23:37,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:37,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:23:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:23:37,651 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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) [2021-06-05 06:23:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:39,688 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-05 06:23:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:23:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 41 [2021-06-05 06:23:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:39,694 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 06:23:39,694 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 06:23:39,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1740.8ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:23:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 06:23:39,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-05 06:23:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-05 06:23:39,712 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-05 06:23:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:39,712 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-05 06:23:39,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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) [2021-06-05 06:23:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-05 06:23:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:23:39,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:39,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:39,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:39,929 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-05 06:23:39,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:39,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832735584] [2021-06-05 06:23:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:40,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:40,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832735584] [2021-06-05 06:23:40,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832735584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:40,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920887260] [2021-06-05 06:23:40,227 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:40,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:23:40,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:23:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:40,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:40,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 06:23:40,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:40,861 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-06-05 06:23:40,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:40,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:57 [2021-06-05 06:23:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:41,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:41,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:41,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:41,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:41,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:41,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:41,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:41,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:23:41,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:41,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:41,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:41,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-06-05 06:23:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:41,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920887260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:41,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:41,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 06:23:41,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357314755] [2021-06-05 06:23:41,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:23:41,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:41,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:23:41,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:23:41,090 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-05 06:23:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:43,519 INFO L93 Difference]: Finished difference Result 2586 states and 5448 transitions. [2021-06-05 06:23:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:23:43,520 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 41 [2021-06-05 06:23:43,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:43,525 INFO L225 Difference]: With dead ends: 2586 [2021-06-05 06:23:43,526 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 06:23:43,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 1867.0ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:23:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 06:23:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 746. [2021-06-05 06:23:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.153020134228188) internal successors, (1604), 745 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1604 transitions. [2021-06-05 06:23:43,545 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1604 transitions. Word has length 41 [2021-06-05 06:23:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:43,545 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1604 transitions. [2021-06-05 06:23:43,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-05 06:23:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1604 transitions. [2021-06-05 06:23:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:23:43,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:43,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:43,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:43,760 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:43,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-05 06:23:43,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:43,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029772154] [2021-06-05 06:23:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:23:44,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:44,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029772154] [2021-06-05 06:23:44,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029772154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:44,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118378509] [2021-06-05 06:23:44,070 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:44,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:23:44,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:44,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:23:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:44,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:44,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 06:23:44,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:44,823 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-06-05 06:23:44,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:44,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-06-05 06:23:46,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:46,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:46,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:46,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:46,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:46,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2021-06-05 06:23:46,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:23:46,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:46,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:46,267 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-05 06:23:46,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 06:23:46,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:46,297 INFO L628 ElimStorePlain]: treesize reduction 21, result has 59.6 percent of original size [2021-06-05 06:23:46,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:46,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-06-05 06:23:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:46,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118378509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:46,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:46,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 06:23:46,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376713211] [2021-06-05 06:23:46,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:23:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:23:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:23:46,380 INFO L87 Difference]: Start difference. First operand 746 states and 1604 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:51,468 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 06:23:52,104 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 06:23:52,534 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 06:23:53,240 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 06:23:53,967 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 06:23:56,542 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 06:23:58,281 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 06:23:58,937 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 06:24:01,577 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 06:24:03,154 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 06:24:03,392 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 06:24:04,226 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 06:24:05,110 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 06:24:05,613 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 06:24:09,086 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 06:24:14,842 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 06:24:16,649 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 06:24:17,378 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 06:24:20,266 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 06:24:22,845 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:24:23,354 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 06:24:24,845 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 06:24:26,646 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 06:24:29,121 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 06:24:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:30,245 INFO L93 Difference]: Finished difference Result 3393 states and 7212 transitions. [2021-06-05 06:24:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 06:24:30,245 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:24:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:30,252 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 06:24:30,252 INFO L226 Difference]: Without dead ends: 3071 [2021-06-05 06:24:30,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5844 ImplicationChecksByTransitivity, 29631.5ms TimeCoverageRelationStatistics Valid=2687, Invalid=14342, Unknown=1, NotChecked=0, Total=17030 [2021-06-05 06:24:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-06-05 06:24:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 882. [2021-06-05 06:24:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.155505107832009) internal successors, (1899), 881 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1899 transitions. [2021-06-05 06:24:30,274 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1899 transitions. Word has length 41 [2021-06-05 06:24:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:30,274 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 1899 transitions. [2021-06-05 06:24:30,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1899 transitions. [2021-06-05 06:24:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:24:30,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:30,275 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:30,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:30,489 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-05 06:24:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:30,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054834141] [2021-06-05 06:24:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:24:30,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:30,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054834141] [2021-06-05 06:24:30,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054834141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:30,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254575547] [2021-06-05 06:24:30,792 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:30,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:24:30,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:31,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:31,436 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 42 treesize of output 52 [2021-06-05 06:24:31,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:31,484 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-05 06:24:31,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:31,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-05 06:24:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:31,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:31,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:31,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:31,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:31,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:31,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 06:24:31,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:31,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:31,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:31,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 06:24:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:31,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254575547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:31,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:31,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 06:24:31,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180214582] [2021-06-05 06:24:31,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:24:31,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:31,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:24:31,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:24:31,610 INFO L87 Difference]: Start difference. First operand 882 states and 1899 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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) [2021-06-05 06:24:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:33,554 INFO L93 Difference]: Finished difference Result 3308 states and 7100 transitions. [2021-06-05 06:24:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:24:33,555 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 41 [2021-06-05 06:24:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:33,562 INFO L225 Difference]: With dead ends: 3308 [2021-06-05 06:24:33,562 INFO L226 Difference]: Without dead ends: 3100 [2021-06-05 06:24:33,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1501.9ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:24:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-06-05 06:24:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1074. [2021-06-05 06:24:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.1491146318732524) internal successors, (2306), 1073 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2306 transitions. [2021-06-05 06:24:33,600 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2306 transitions. Word has length 41 [2021-06-05 06:24:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:33,600 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2306 transitions. [2021-06-05 06:24:33,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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) [2021-06-05 06:24:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2306 transitions. [2021-06-05 06:24:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:24:33,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:33,602 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:33,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 06:24:33,821 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-05 06:24:33,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:33,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989078331] [2021-06-05 06:24:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:34,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:34,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989078331] [2021-06-05 06:24:34,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989078331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:34,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098723675] [2021-06-05 06:24:34,182 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:34,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:34,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:24:34,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:34,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:34,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 06:24:34,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:34,818 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 06:24:34,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:34,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 06:24:34,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:34,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:34,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:34,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 06:24:34,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:34,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:34,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:34,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 06:24:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:35,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098723675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:35,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:35,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 06:24:35,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830543872] [2021-06-05 06:24:35,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:24:35,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:35,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:24:35,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:24:35,002 INFO L87 Difference]: Start difference. First operand 1074 states and 2306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-05 06:24:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:37,504 INFO L93 Difference]: Finished difference Result 3729 states and 7998 transitions. [2021-06-05 06:24:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:24:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 41 [2021-06-05 06:24:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:37,515 INFO L225 Difference]: With dead ends: 3729 [2021-06-05 06:24:37,516 INFO L226 Difference]: Without dead ends: 3485 [2021-06-05 06:24:37,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1799.8ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:24:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-06-05 06:24:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1340. [2021-06-05 06:24:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.1598207617625094) internal successors, (2892), 1339 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2892 transitions. [2021-06-05 06:24:37,542 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2892 transitions. Word has length 41 [2021-06-05 06:24:37,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:37,543 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 2892 transitions. [2021-06-05 06:24:37,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2021-06-05 06:24:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2892 transitions. [2021-06-05 06:24:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 06:24:37,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:37,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:37,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:37,754 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:37,755 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-05 06:24:37,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:37,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750860828] [2021-06-05 06:24:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:38,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:38,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750860828] [2021-06-05 06:24:38,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750860828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:38,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903402741] [2021-06-05 06:24:38,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:38,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:24:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:24:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:38,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:38,573 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 40 treesize of output 50 [2021-06-05 06:24:38,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:38,617 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.4 percent of original size [2021-06-05 06:24:38,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:38,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:57 [2021-06-05 06:24:39,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-05 06:24:39,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:24:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,107 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-05 06:24:39,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 06:24:39,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,177 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-05 06:24:39,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:24:39,188 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-05 06:24:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:39,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903402741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:39,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:39,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 06:24:39,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547681563] [2021-06-05 06:24:39,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 06:24:39,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:39,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 06:24:39,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:24:39,298 INFO L87 Difference]: Start difference. First operand 1340 states and 2892 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:42,556 INFO L93 Difference]: Finished difference Result 3544 states and 7640 transitions. [2021-06-05 06:24:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:24:42,556 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 06:24:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:42,560 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 06:24:42,560 INFO L226 Difference]: Without dead ends: 3383 [2021-06-05 06:24:42,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2726.6ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:24:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-06-05 06:24:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1483. [2021-06-05 06:24:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.163292847503374) internal successors, (3206), 1482 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3206 transitions. [2021-06-05 06:24:42,584 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3206 transitions. Word has length 41 [2021-06-05 06:24:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:42,584 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3206 transitions. [2021-06-05 06:24:42,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3206 transitions. [2021-06-05 06:24:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 06:24:42,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:42,586 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:42,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 06:24:42,801 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-05 06:24:42,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:42,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162912657] [2021-06-05 06:24:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:42,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:42,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162912657] [2021-06-05 06:24:42,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162912657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:42,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730669862] [2021-06-05 06:24:42,848 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:42,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:42,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:42,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:24:42,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:42,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730669862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:42,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:42,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 06:24:42,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271667717] [2021-06-05 06:24:42,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:24:42,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:42,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:24:42,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:24:42,996 INFO L87 Difference]: Start difference. First operand 1483 states and 3206 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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) [2021-06-05 06:24:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:43,062 INFO L93 Difference]: Finished difference Result 2019 states and 4365 transitions. [2021-06-05 06:24:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:24:43,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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 45 [2021-06-05 06:24:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:43,069 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 06:24:43,070 INFO L226 Difference]: Without dead ends: 1969 [2021-06-05 06:24:43,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:24:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-06-05 06:24:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1621. [2021-06-05 06:24:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.175925925925926) internal successors, (3525), 1620 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3525 transitions. [2021-06-05 06:24:43,094 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3525 transitions. Word has length 45 [2021-06-05 06:24:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:43,094 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3525 transitions. [2021-06-05 06:24:43,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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) [2021-06-05 06:24:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3525 transitions. [2021-06-05 06:24:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 06:24:43,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:43,097 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:43,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:43,312 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-05 06:24:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:43,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027940885] [2021-06-05 06:24:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 06:24:43,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:43,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027940885] [2021-06-05 06:24:43,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027940885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:43,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492059293] [2021-06-05 06:24:43,334 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:43,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:24:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:43,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:24:43,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 06:24:43,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492059293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:43,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:43,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 06:24:43,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875327059] [2021-06-05 06:24:43,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:24:43,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:24:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:24:43,430 INFO L87 Difference]: Start difference. First operand 1621 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:43,455 INFO L93 Difference]: Finished difference Result 2104 states and 4548 transitions. [2021-06-05 06:24:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:24:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 06:24:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:43,458 INFO L225 Difference]: With dead ends: 2104 [2021-06-05 06:24:43,458 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 06:24:43,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:24:43,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 06:24:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1445. [2021-06-05 06:24:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.1717451523545708) internal successors, (3136), 1444 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3136 transitions. [2021-06-05 06:24:43,477 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3136 transitions. Word has length 46 [2021-06-05 06:24:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:43,477 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 3136 transitions. [2021-06-05 06:24:43,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3136 transitions. [2021-06-05 06:24:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 06:24:43,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:43,479 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:43,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:43,695 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:43,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-05 06:24:43,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:43,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857415845] [2021-06-05 06:24:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:24:43,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:43,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857415845] [2021-06-05 06:24:43,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857415845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:43,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806721182] [2021-06-05 06:24:43,722 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:43,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:24:43,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:24:43,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:24:43,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806721182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:43,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:43,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 06:24:43,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826872559] [2021-06-05 06:24:43,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:24:43,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:43,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:24:43,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:24:43,817 INFO L87 Difference]: Start difference. First operand 1445 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:43,848 INFO L93 Difference]: Finished difference Result 1604 states and 3442 transitions. [2021-06-05 06:24:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:24:43,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 06:24:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:43,851 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 06:24:43,851 INFO L226 Difference]: Without dead ends: 1604 [2021-06-05 06:24:43,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:24:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-06-05 06:24:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1207. [2021-06-05 06:24:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.1550580431177444) internal successors, (2599), 1206 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2599 transitions. [2021-06-05 06:24:43,875 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2599 transitions. Word has length 46 [2021-06-05 06:24:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:43,875 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2599 transitions. [2021-06-05 06:24:43,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2599 transitions. [2021-06-05 06:24:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 06:24:43,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:43,877 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:44,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 06:24:44,078 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-05 06:24:44,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:44,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954481987] [2021-06-05 06:24:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:44,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954481987] [2021-06-05 06:24:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954481987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983131910] [2021-06-05 06:24:44,644 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:24:44,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:45,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-05 06:24:45,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:45,273 INFO L628 ElimStorePlain]: treesize reduction 86, result has 58.7 percent of original size [2021-06-05 06:24:45,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:45,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:48 [2021-06-05 06:24:45,675 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 06:24:45,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 06:24:45,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:45,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:45,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:45,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-05 06:24:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983131910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:45,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:45,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-05 06:24:45,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839936052] [2021-06-05 06:24:45,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 06:24:45,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 06:24:45,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:24:45,690 INFO L87 Difference]: Start difference. First operand 1207 states and 2599 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:48,992 INFO L93 Difference]: Finished difference Result 2755 states and 5872 transitions. [2021-06-05 06:24:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:24:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 06:24:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:48,996 INFO L225 Difference]: With dead ends: 2755 [2021-06-05 06:24:48,996 INFO L226 Difference]: Without dead ends: 2659 [2021-06-05 06:24:48,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2573.4ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 06:24:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-06-05 06:24:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1299. [2021-06-05 06:24:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.1656394453004624) internal successors, (2811), 1298 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2811 transitions. [2021-06-05 06:24:49,015 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2811 transitions. Word has length 50 [2021-06-05 06:24:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:49,015 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 2811 transitions. [2021-06-05 06:24:49,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2811 transitions. [2021-06-05 06:24:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 06:24:49,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:49,017 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:49,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:49,233 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:49,233 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-05 06:24:49,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:49,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034837654] [2021-06-05 06:24:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:24:49,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:49,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034837654] [2021-06-05 06:24:49,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034837654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:49,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212714523] [2021-06-05 06:24:49,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:49,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:49,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:49,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:24:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:50,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:50,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-05 06:24:50,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:50,938 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-05 06:24:50,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:50,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-05 06:24:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:51,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:51,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:51,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:51,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-06-05 06:24:51,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 06:24:51,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:51,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:51,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:51,497 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-05 06:24:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:51,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212714523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:51,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:51,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-05 06:24:51,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361069779] [2021-06-05 06:24:51,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 06:24:51,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:51,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 06:24:51,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:24:51,506 INFO L87 Difference]: Start difference. First operand 1299 states and 2811 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:56,940 INFO L93 Difference]: Finished difference Result 3297 states and 7007 transitions. [2021-06-05 06:24:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 06:24:56,941 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 06:24:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:56,945 INFO L225 Difference]: With dead ends: 3297 [2021-06-05 06:24:56,945 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 06:24:56,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4333.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 06:24:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 06:24:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1653. [2021-06-05 06:24:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.151331719128329) internal successors, (3554), 1652 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3554 transitions. [2021-06-05 06:24:56,968 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3554 transitions. Word has length 50 [2021-06-05 06:24:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:56,968 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3554 transitions. [2021-06-05 06:24:56,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3554 transitions. [2021-06-05 06:24:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 06:24:56,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:56,971 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:57,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 06:24:57,179 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-05 06:24:57,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:57,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842621222] [2021-06-05 06:24:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:57,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:57,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842621222] [2021-06-05 06:24:57,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842621222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:57,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91355085] [2021-06-05 06:24:57,665 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:57,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:24:57,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:24:57,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:00,898 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 06:25:01,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:01,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 06:25:01,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:01,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:01,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 06:25:01,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:01,284 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-06-05 06:25:01,284 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-06-05 06:25:01,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-05 06:25:01,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-06-05 06:25:12,411 WARN L205 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 06:25:39,230 WARN L205 SmtUtils]: Spent 16.47 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 06:25:39,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:39,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:39,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:39,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:39,556 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-05 06:25:39,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-05 06:25:40,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:40,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:40,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:40,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:40,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:40,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-05 06:25:41,123 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 201 [2021-06-05 06:25:41,418 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 06:25:41,570 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 06:25:41,745 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 269 [2021-06-05 06:25:42,697 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-06-05 06:25:43,128 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 60 [2021-06-05 06:25:43,406 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-06-05 06:25:43,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:43,711 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 73 [2021-06-05 06:25:43,711 INFO L628 ElimStorePlain]: treesize reduction 474, result has 24.8 percent of original size [2021-06-05 06:25:43,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:25:43,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-06-05 06:25:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:43,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91355085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:43,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:43,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-05 06:25:43,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410670989] [2021-06-05 06:25:43,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 06:25:43,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:43,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 06:25:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2268, Unknown=3, NotChecked=0, Total=2550 [2021-06-05 06:25:43,871 INFO L87 Difference]: Start difference. First operand 1653 states and 3554 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:01,035 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 06:26:11,479 WARN L205 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-06-05 06:26:21,261 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2021-06-05 06:26:24,768 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 06:26:40,822 WARN L205 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-06-05 06:26:44,549 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 06:26:50,199 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 06:26:58,884 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-06-05 06:27:11,461 WARN L205 SmtUtils]: Spent 7.10 s on a formula simplification. DAG size of input: 134 DAG size of output: 44 [2021-06-05 06:27:24,816 WARN L205 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2021-06-05 06:27:32,823 WARN L205 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 124 DAG size of output: 46 [2021-06-05 06:27:40,061 WARN L205 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-05 06:27:53,012 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2021-06-05 06:27:58,303 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2021-06-05 06:28:04,757 WARN L205 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2021-06-05 06:28:14,726 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-05 06:28:22,145 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-06-05 06:28:33,031 WARN L205 SmtUtils]: Spent 7.31 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 06:28:46,238 WARN L205 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2021-06-05 06:28:54,835 WARN L205 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 06:28:57,572 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-06-05 06:29:14,346 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2021-06-05 06:29:23,311 WARN L205 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 131 DAG size of output: 51 [2021-06-05 06:29:41,890 WARN L205 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2021-06-05 06:29:55,239 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-06-05 06:30:03,666 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 06:30:07,059 WARN L205 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2021-06-05 06:30:16,467 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2021-06-05 06:30:51,193 WARN L205 SmtUtils]: Spent 11.58 s on a formula simplification. DAG size of input: 134 DAG size of output: 57 [2021-06-05 06:31:09,329 WARN L205 SmtUtils]: Spent 7.15 s on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-06-05 06:31:17,064 WARN L205 SmtUtils]: Spent 6.91 s on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2021-06-05 06:31:31,691 WARN L205 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-06-05 06:31:52,346 WARN L205 SmtUtils]: Spent 12.28 s on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2021-06-05 06:32:22,968 WARN L205 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 134 DAG size of output: 62 [2021-06-05 06:32:31,709 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 06:32:37,383 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2021-06-05 06:32:45,522 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 06:33:05,204 WARN L205 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2021-06-05 06:33:29,165 WARN L205 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2021-06-05 06:33:47,736 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-06-05 06:33:53,837 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 06:34:07,401 WARN L205 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-06-05 06:34:54,313 WARN L205 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 145 DAG size of output: 52 [2021-06-05 06:35:09,536 WARN L205 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-06-05 06:35:17,257 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-06-05 06:35:24,716 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-05 06:35:46,699 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 68 [2021-06-05 06:36:05,283 WARN L205 SmtUtils]: Spent 9.57 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 06:36:30,505 WARN L205 SmtUtils]: Spent 8.33 s on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-05 06:37:04,678 WARN L205 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2021-06-05 06:37:27,152 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 06:37:36,272 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 Received shutdown request... [2021-06-05 06:37:57,752 WARN L222 SmtUtils]: Removed 6 from assertion stack [2021-06-05 06:37:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 06:37:57,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 06:37:57,953 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:37:57,954 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:37:57,956 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:37:57,956 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:37:57 BasicIcfg [2021-06-05 06:37:57,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:37:57,956 INFO L168 Benchmark]: Toolchain (without parser) took 877469.31 ms. Allocated memory was 369.1 MB in the beginning and 534.8 MB in the end (delta: 165.7 MB). Free memory was 348.1 MB in the beginning and 300.8 MB in the end (delta: 47.4 MB). Peak memory consumption was 216.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:37:57,957 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 369.1 MB. Free memory was 349.3 MB in the beginning and 349.2 MB in the end (delta: 76.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:37:57,957 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.56 ms. Allocated memory is still 369.1 MB. Free memory was 348.1 MB in the beginning and 346.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:37:57,957 INFO L168 Benchmark]: Boogie Preprocessor took 14.37 ms. Allocated memory is still 369.1 MB. Free memory was 346.6 MB in the beginning and 345.7 MB in the end (delta: 941.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:37:57,957 INFO L168 Benchmark]: RCFGBuilder took 229.43 ms. Allocated memory is still 369.1 MB. Free memory was 345.6 MB in the beginning and 332.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 06:37:57,957 INFO L168 Benchmark]: TraceAbstraction took 877200.64 ms. Allocated memory was 369.1 MB in the beginning and 534.8 MB in the end (delta: 165.7 MB). Free memory was 332.2 MB in the beginning and 300.8 MB in the end (delta: 31.4 MB). Peak memory consumption was 199.3 MB. Max. memory is 16.0 GB. [2021-06-05 06:37:57,957 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 369.1 MB. Free memory was 349.3 MB in the beginning and 349.2 MB in the end (delta: 76.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.56 ms. Allocated memory is still 369.1 MB. Free memory was 348.1 MB in the beginning and 346.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.37 ms. Allocated memory is still 369.1 MB. Free memory was 346.6 MB in the beginning and 345.7 MB in the end (delta: 941.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 229.43 ms. Allocated memory is still 369.1 MB. Free memory was 345.6 MB in the beginning and 332.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 877200.64 ms. Allocated memory was 369.1 MB in the beginning and 534.8 MB in the end (delta: 165.7 MB). Free memory was 332.2 MB in the beginning and 300.8 MB in the end (delta: 31.4 MB). Peak memory consumption was 199.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 115 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 105 for 583ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 115 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 105 for 583ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 115 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 105 for 583ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 877124.0ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 35.5ms, AutomataDifference: 807073.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1118 SDtfs, 5145 SDslu, 11777 SDs, 0 SdLazy, 27878 SolverSat, 3104 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 131523.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1806 GetRequests, 590 SyntacticMatches, 47 SemanticMatches, 1168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36123 ImplicationChecksByTransitivity, 707816.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1653occurred in iteration=22, InterpolantAutomatonStates: 750, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 375.7ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19446 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 130.0ms SsaConstructionTime, 371.0ms SatisfiabilityAnalysisTime, 64005.9ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 296 QuantifiedInterpolants, 27566 SizeOfPredicates, 225 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 538 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 268/1315 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