/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:27:38,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:27:38,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:27:38,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:27:38,660 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 [2021-07-13 20:27:38,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:27:38,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:27:38,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:27:38,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:27:38,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:27:38,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:27:38,689 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:27:38,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:27:38,689 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:27:38,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:27:38,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:27:38,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:27:38,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:27:38,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:27:38,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:27:38,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:27:38,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:27:38,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:27:38,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:27:38,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:27:38,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:27:38,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:27:38,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:27:38,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:27:38,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:27:38,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:27:38,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:27:38,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:27:38,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:27:38,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:27:38,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:27:38,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:27:38,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:27:38,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:27:38,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:27:38,926 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:27:38,927 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:27:38,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2021-07-13 20:27:38,928 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2021-07-13 20:27:38,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:27:38,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:27:38,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:27:38,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:27:38,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:27:38,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:27:38,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:27:38,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:27:38,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:27:38,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/1) ... [2021-07-13 20:27:38,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:27:38,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:27:38,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:27:38,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:27:38,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (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 [2021-07-13 20:27:39,062 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:27:39,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:27:39,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:27:39,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:27:39,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:27:39,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:27:39,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:27:39,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:27:39,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:27:39,064 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:27:39,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:27:39,231 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:27:39,233 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:27:39 BoogieIcfgContainer [2021-07-13 20:27:39,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:27:39,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:27:39,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:27:39,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:27:39,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:38" (1/2) ... [2021-07-13 20:27:39,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f654f7d and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:27:39, skipping insertion in model container [2021-07-13 20:27:39,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:27:39" (2/2) ... [2021-07-13 20:27:39,238 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2021-07-13 20:27:39,241 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:27:39,241 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:27:39,241 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:27:39,242 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:27:39,264 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:27:39,278 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:27:39,291 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:27:39,291 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:27:39,291 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:27:39,291 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:27:39,291 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:27:39,291 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:27:39,291 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:27:39,291 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:27:39,297 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-07-13 20:27:39,330 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 20:27:39,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:39,337 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:39,337 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-07-13 20:27:39,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:39,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033603054] [2021-07-13 20:27:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:39,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:39,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033603054] [2021-07-13 20:27:39,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033603054] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:27:39,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:27:39,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:27:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317227748] [2021-07-13 20:27:39,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:27:39,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:39,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:27:39,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:27:39,516 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 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) [2021-07-13 20:27:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:39,543 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-07-13 20:27:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:27:39,545 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 [2021-07-13 20:27:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:39,554 INFO L225 Difference]: With dead ends: 104 [2021-07-13 20:27:39,554 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 20:27:39,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:27:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 20:27:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-07-13 20:27:39,590 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) [2021-07-13 20:27:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-07-13 20:27:39,592 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-07-13 20:27:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:39,593 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-07-13 20:27:39,593 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) [2021-07-13 20:27:39,593 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-07-13 20:27:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:27:39,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:39,594 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:39,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:27:39,595 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-07-13 20:27:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:39,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164491044] [2021-07-13 20:27:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:39,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:39,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164491044] [2021-07-13 20:27:39,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164491044] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:27:39,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:27:39,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:27:39,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813963767] [2021-07-13 20:27:39,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:27:39,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:39,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:27:39,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:27:39,665 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) [2021-07-13 20:27:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:39,683 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-07-13 20:27:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:27:39,683 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 [2021-07-13 20:27:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:39,684 INFO L225 Difference]: With dead ends: 91 [2021-07-13 20:27:39,684 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 20:27:39,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:27:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 20:27:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-07-13 20:27:39,689 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) [2021-07-13 20:27:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-07-13 20:27:39,690 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-07-13 20:27:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:39,690 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-07-13 20:27:39,690 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) [2021-07-13 20:27:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-07-13 20:27:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:27:39,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:39,691 INFO L508 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] [2021-07-13 20:27:39,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:27:39,691 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:39,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-07-13 20:27:39,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:39,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630063775] [2021-07-13 20:27:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:39,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:39,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630063775] [2021-07-13 20:27:39,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630063775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:39,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168456173] [2021-07-13 20:27:39,783 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 [2021-07-13 20:27:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:27:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:39,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 20:27:40,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-07-13 20:27:40,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:27:40,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-07-13 20:27:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168456173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:40,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:27:40,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862443882] [2021-07-13 20:27:40,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:40,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:40,120 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) [2021-07-13 20:27:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:40,185 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-07-13 20:27:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:27:40,185 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 [2021-07-13 20:27:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:40,186 INFO L225 Difference]: With dead ends: 154 [2021-07-13 20:27:40,186 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 20:27:40,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 20:27:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-07-13 20:27:40,193 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) [2021-07-13 20:27:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-07-13 20:27:40,194 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-07-13 20:27:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:40,194 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-07-13 20:27:40,194 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) [2021-07-13 20:27:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-07-13 20:27:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:40,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:40,195 INFO L508 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] [2021-07-13 20:27:40,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:27:40,402 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:40,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-07-13 20:27:40,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:40,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037847170] [2021-07-13 20:27:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:40,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037847170] [2021-07-13 20:27:40,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037847170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734565149] [2021-07-13 20:27:40,445 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 [2021-07-13 20:27:40,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:40,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:27:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734565149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:40,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-13 20:27:40,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008417094] [2021-07-13 20:27:40,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:27:40,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:27:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:27:40,561 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) [2021-07-13 20:27:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:40,634 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-07-13 20:27:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:27:40,635 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 [2021-07-13 20:27:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:40,637 INFO L225 Difference]: With dead ends: 284 [2021-07-13 20:27:40,637 INFO L226 Difference]: Without dead ends: 264 [2021-07-13 20:27:40,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:27:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-13 20:27:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-07-13 20:27:40,659 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) [2021-07-13 20:27:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-07-13 20:27:40,660 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-07-13 20:27:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:40,660 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-07-13 20:27:40,660 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) [2021-07-13 20:27:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-07-13 20:27:40,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:27:40,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:40,662 INFO L508 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] [2021-07-13 20:27:40,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:40,876 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-07-13 20:27:40,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:40,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356151216] [2021-07-13 20:27:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:41,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356151216] [2021-07-13 20:27:41,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356151216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350177952] [2021-07-13 20:27:41,117 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 [2021-07-13 20:27:41,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:27:41,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:27:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:41,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:27:41,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-07-13 20:27:41,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:27:41,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:41,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-07-13 20:27:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350177952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:41,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-07-13 20:27:41,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636821030] [2021-07-13 20:27:41,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:27:41,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:41,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:27:41,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:27:41,762 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) [2021-07-13 20:27:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:43,508 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-07-13 20:27:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:27:43,511 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 [2021-07-13 20:27:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:43,515 INFO L225 Difference]: With dead ends: 650 [2021-07-13 20:27:43,515 INFO L226 Difference]: Without dead ends: 573 [2021-07-13 20:27:43,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1315.8ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:27:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-13 20:27:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-07-13 20:27:43,528 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) [2021-07-13 20:27:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-07-13 20:27:43,530 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-07-13 20:27:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:43,530 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-07-13 20:27:43,530 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) [2021-07-13 20:27:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-07-13 20:27:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:27:43,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:43,532 INFO L508 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] [2021-07-13 20:27:43,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:43,741 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-07-13 20:27:43,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:43,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885375141] [2021-07-13 20:27:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:43,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:43,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885375141] [2021-07-13 20:27:43,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885375141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:43,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807096064] [2021-07-13 20:27:43,919 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 [2021-07-13 20:27:43,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:43,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:43,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:27:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:44,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:44,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-13 20:27:44,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:44,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:44,233 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. [2021-07-13 20:27:44,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-13 20:27:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:44,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:44,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:27:44,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:44,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:44,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:44,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-13 20:27:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:44,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807096064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:44,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:44,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-13 20:27:44,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358310561] [2021-07-13 20:27:44,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:27:44,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:27:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:27:44,327 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) [2021-07-13 20:27:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:44,861 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-07-13 20:27:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:27:44,861 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 [2021-07-13 20:27:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:44,865 INFO L225 Difference]: With dead ends: 1023 [2021-07-13 20:27:44,865 INFO L226 Difference]: Without dead ends: 878 [2021-07-13 20:27:44,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:27:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-13 20:27:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-07-13 20:27:44,877 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) [2021-07-13 20:27:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-07-13 20:27:44,879 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-07-13 20:27:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:44,879 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-07-13 20:27:44,879 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) [2021-07-13 20:27:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-07-13 20:27:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:27:44,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:44,881 INFO L508 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] [2021-07-13 20:27:45,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:45,098 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:45,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-07-13 20:27:45,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:45,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718674687] [2021-07-13 20:27:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:45,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:45,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718674687] [2021-07-13 20:27:45,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718674687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:45,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629677265] [2021-07-13 20:27:45,309 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 [2021-07-13 20:27:45,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:27:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:27:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:45,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:45,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:27:45,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:45,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:45,569 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. [2021-07-13 20:27:45,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-07-13 20:27:45,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:45,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:45,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-07-13 20:27:45,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:45,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:45,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:45,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-07-13 20:27:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:45,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629677265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:45,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:45,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-13 20:27:45,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138772575] [2021-07-13 20:27:45,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:27:45,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:27:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:27:45,674 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) [2021-07-13 20:27:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:46,417 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-07-13 20:27:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:27:46,419 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 [2021-07-13 20:27:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:46,423 INFO L225 Difference]: With dead ends: 1081 [2021-07-13 20:27:46,423 INFO L226 Difference]: Without dead ends: 927 [2021-07-13 20:27:46,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:27:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-13 20:27:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-07-13 20:27:46,435 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) [2021-07-13 20:27:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-07-13 20:27:46,436 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-07-13 20:27:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:46,436 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-07-13 20:27:46,436 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) [2021-07-13 20:27:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-07-13 20:27:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:27:46,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:46,442 INFO L508 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] [2021-07-13 20:27:46,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:27:46,659 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:46,659 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-07-13 20:27:46,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:46,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976209649] [2021-07-13 20:27:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:46,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:46,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976209649] [2021-07-13 20:27:46,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976209649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:46,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008953082] [2021-07-13 20:27:46,857 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 [2021-07-13 20:27:46,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:46,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:46,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:27:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:47,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:47,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:27:47,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:47,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-07-13 20:27:47,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:47,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-07-13 20:27:47,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:47,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-07-13 20:27:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:47,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008953082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:47,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:47,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-13 20:27:47,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766726908] [2021-07-13 20:27:47,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:47,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:47,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:47,140 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:47,923 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-07-13 20:27:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:27:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:27:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:47,927 INFO L225 Difference]: With dead ends: 1050 [2021-07-13 20:27:47,927 INFO L226 Difference]: Without dead ends: 939 [2021-07-13 20:27:47,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:27:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-13 20:27:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-07-13 20:27:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-07-13 20:27:47,940 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-07-13 20:27:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:47,940 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-07-13 20:27:47,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-07-13 20:27:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:27:47,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:47,944 INFO L508 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] [2021-07-13 20:27:48,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:48,157 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-07-13 20:27:48,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:48,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590384613] [2021-07-13 20:27:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:48,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:48,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590384613] [2021-07-13 20:27:48,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590384613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:48,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843743793] [2021-07-13 20:27:48,338 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 [2021-07-13 20:27:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:48,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:27:48,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:48,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:48,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-13 20:27:48,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:48,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:48,609 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. [2021-07-13 20:27:48,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-13 20:27:48,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:48,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:48,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:48,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-07-13 20:27:48,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:48,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:48,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:48,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-13 20:27:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:48,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843743793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:48,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:48,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-13 20:27:48,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566893066] [2021-07-13 20:27:48,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:27:48,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:48,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:27:48,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:27:48,732 INFO L87 Difference]: Start difference. First operand 482 states and 1047 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) [2021-07-13 20:27:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:49,240 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-07-13 20:27:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:27:49,240 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 [2021-07-13 20:27:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:49,243 INFO L225 Difference]: With dead ends: 1045 [2021-07-13 20:27:49,243 INFO L226 Difference]: Without dead ends: 947 [2021-07-13 20:27:49,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-07-13 20:27:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-07-13 20:27:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.1576673866090714) internal successors, (999), 463 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-07-13 20:27:49,253 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-07-13 20:27:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:49,254 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-07-13 20:27:49,254 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) [2021-07-13 20:27:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-07-13 20:27:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:27:49,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:49,255 INFO L508 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] [2021-07-13 20:27:49,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:49,461 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-07-13 20:27:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:49,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724693946] [2021-07-13 20:27:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:49,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:49,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724693946] [2021-07-13 20:27:49,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724693946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:49,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288956696] [2021-07-13 20:27:49,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:27:49,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:49,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:49,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:27:49,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:49,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288956696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:49,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:49,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-07-13 20:27:49,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775066118] [2021-07-13 20:27:49,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:27:49,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:49,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:27:49,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:27:49,587 INFO L87 Difference]: Start difference. First operand 464 states and 999 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) [2021-07-13 20:27:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:49,654 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-07-13 20:27:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:27:49,655 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 [2021-07-13 20:27:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:49,658 INFO L225 Difference]: With dead ends: 882 [2021-07-13 20:27:49,658 INFO L226 Difference]: Without dead ends: 844 [2021-07-13 20:27:49,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:27:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-07-13 20:27:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-07-13 20:27:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.182584269662921) internal successors, (1554), 712 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-07-13 20:27:49,669 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-07-13 20:27:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:49,669 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-07-13 20:27:49,669 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) [2021-07-13 20:27:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-07-13 20:27:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:27:49,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:49,671 INFO L508 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] [2021-07-13 20:27:49,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:27:49,885 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:49,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-07-13 20:27:49,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:49,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661752518] [2021-07-13 20:27:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:50,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:50,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661752518] [2021-07-13 20:27:50,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661752518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:50,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689063207] [2021-07-13 20:27:50,215 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 [2021-07-13 20:27:50,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:27:50,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:50,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:27:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:50,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:50,563 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 [2021-07-13 20:27:50,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:50,606 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-07-13 20:27:50,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:50,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-07-13 20:27:50,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:50,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:50,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:27:50,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:50,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:50,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:50,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-07-13 20:27:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:50,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689063207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:50,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:50,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-07-13 20:27:50,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250686040] [2021-07-13 20:27:50,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:27:50,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:27:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:27:50,973 INFO L87 Difference]: Start difference. First operand 713 states and 1554 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) [2021-07-13 20:27:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:54,632 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-07-13 20:27:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:27:54,635 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 [2021-07-13 20:27:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:54,642 INFO L225 Difference]: With dead ends: 2812 [2021-07-13 20:27:54,642 INFO L226 Difference]: Without dead ends: 2548 [2021-07-13 20:27:54,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 2963.9ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-07-13 20:27:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-07-13 20:27:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-07-13 20:27:54,662 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) [2021-07-13 20:27:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-07-13 20:27:54,663 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-07-13 20:27:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:54,663 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-07-13 20:27:54,663 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) [2021-07-13 20:27:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-07-13 20:27:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:27:54,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:54,665 INFO L508 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] [2021-07-13 20:27:54,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:54,881 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-07-13 20:27:54,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:54,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711943987] [2021-07-13 20:27:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:55,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:55,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711943987] [2021-07-13 20:27:55,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711943987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:55,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817648403] [2021-07-13 20:27:55,189 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 [2021-07-13 20:27:55,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:55,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:27:55,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:55,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:55,826 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 [2021-07-13 20:27:55,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:55,880 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-13 20:27:55,891 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. [2021-07-13 20:27:55,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-13 20:27:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:56,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:56,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:56,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:56,190 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 [2021-07-13 20:27:56,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:56,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:56,201 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 [2021-07-13 20:27:56,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:56,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:56,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:56,208 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-07-13 20:27:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:56,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817648403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:56,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:56,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-13 20:27:56,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264373228] [2021-07-13 20:27:56,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:27:56,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:56,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:27:56,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:27:56,217 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) [2021-07-13 20:27:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:58,122 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-07-13 20:27:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:27:58,123 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 [2021-07-13 20:27:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:58,129 INFO L225 Difference]: With dead ends: 2302 [2021-07-13 20:27:58,129 INFO L226 Difference]: Without dead ends: 2145 [2021-07-13 20:27:58,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1655.8ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:27:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-13 20:27:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-07-13 20:27:58,146 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) [2021-07-13 20:27:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-07-13 20:27:58,148 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-07-13 20:27:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:58,148 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-07-13 20:27:58,148 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) [2021-07-13 20:27:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-07-13 20:27:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:27:58,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:58,149 INFO L508 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] [2021-07-13 20:27:58,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:27:58,365 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-07-13 20:27:58,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:58,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725391076] [2021-07-13 20:27:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:58,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725391076] [2021-07-13 20:27:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725391076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952889430] [2021-07-13 20:27:58,691 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 [2021-07-13 20:27:58,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:27:58,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:58,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:27:58,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:59,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:59,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:27:59,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:59,263 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-07-13 20:27:59,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:59,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-07-13 20:27:59,330 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:27:59,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:27:59,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:59,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:59,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:59,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-07-13 20:27:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:59,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952889430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:59,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:59,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-13 20:27:59,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552637896] [2021-07-13 20:27:59,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:27:59,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:59,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:27:59,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:27:59,347 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:01,200 INFO L93 Difference]: Finished difference Result 2428 states and 5151 transitions. [2021-07-13 20:28:01,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:28:01,201 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:28:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:01,207 INFO L225 Difference]: With dead ends: 2428 [2021-07-13 20:28:01,207 INFO L226 Difference]: Without dead ends: 2232 [2021-07-13 20:28:01,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1606.6ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:28:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-07-13 20:28:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-07-13 20:28:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.1382198952879583) internal successors, (2042), 955 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-07-13 20:28:01,227 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-07-13 20:28:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:01,228 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-07-13 20:28:01,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-07-13 20:28:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:28:01,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:01,229 INFO L508 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] [2021-07-13 20:28:01,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:28:01,445 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:01,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-07-13 20:28:01,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:01,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269301084] [2021-07-13 20:28:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:28:01,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:01,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269301084] [2021-07-13 20:28:01,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269301084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:01,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169270528] [2021-07-13 20:28:01,738 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 [2021-07-13 20:28:01,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:28:01,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:01,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:28:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:02,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:02,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2021-07-13 20:28:02,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:02,605 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-07-13 20:28:02,626 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. [2021-07-13 20:28:02,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-07-13 20:28:03,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:03,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:03,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 63 [2021-07-13 20:28:03,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:28:03,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:03,317 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-07-13 20:28:03,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-07-13 20:28:03,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:03,338 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-07-13 20:28:03,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:03,341 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-07-13 20:28:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:03,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169270528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:03,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:03,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-07-13 20:28:03,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236144943] [2021-07-13 20:28:03,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:28:03,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:03,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:28:03,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:28:03,430 INFO L87 Difference]: Start difference. First operand 956 states and 2042 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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) [2021-07-13 20:28:04,680 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-07-13 20:28:17,694 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-07-13 20:28:18,513 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-13 20:28:19,565 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-13 20:28:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:19,767 INFO L93 Difference]: Finished difference Result 4013 states and 8575 transitions. [2021-07-13 20:28:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-07-13 20:28:19,767 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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 [2021-07-13 20:28:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:19,777 INFO L225 Difference]: With dead ends: 4013 [2021-07-13 20:28:19,778 INFO L226 Difference]: Without dead ends: 3813 [2021-07-13 20:28:19,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 11508.4ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-07-13 20:28:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-07-13 20:28:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-07-13 20:28:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.145405887600357) internal successors, (2405), 1121 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-07-13 20:28:19,805 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-07-13 20:28:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:19,805 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-07-13 20:28:19,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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) [2021-07-13 20:28:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-07-13 20:28:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:28:19,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:19,807 INFO L508 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] [2021-07-13 20:28:20,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:20,021 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-07-13 20:28:20,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:20,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861321297] [2021-07-13 20:28:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:28:20,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:20,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861321297] [2021-07-13 20:28:20,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861321297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:20,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319956702] [2021-07-13 20:28:20,324 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 [2021-07-13 20:28:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:20,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:28:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:20,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:20,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:28:20,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:20,988 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-07-13 20:28:20,993 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. [2021-07-13 20:28:20,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-07-13 20:28:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:21,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:21,090 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 [2021-07-13 20:28:21,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:21,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:21,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:21,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-13 20:28:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:21,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319956702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:21,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:21,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-13 20:28:21,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604218451] [2021-07-13 20:28:21,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:28:21,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:21,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:28:21,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:28:21,108 INFO L87 Difference]: Start difference. First operand 1122 states and 2405 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) [2021-07-13 20:28:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:23,092 INFO L93 Difference]: Finished difference Result 4028 states and 8625 transitions. [2021-07-13 20:28:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:28:23,092 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 [2021-07-13 20:28:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:23,103 INFO L225 Difference]: With dead ends: 4028 [2021-07-13 20:28:23,103 INFO L226 Difference]: Without dead ends: 3805 [2021-07-13 20:28:23,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1493.9ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:28:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-07-13 20:28:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-07-13 20:28:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.1377371749824317) internal successors, (3042), 1423 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-07-13 20:28:23,132 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-07-13 20:28:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:23,132 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-07-13 20:28:23,132 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) [2021-07-13 20:28:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-07-13 20:28:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:28:23,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:23,134 INFO L508 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] [2021-07-13 20:28:23,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:28:23,350 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-07-13 20:28:23,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:23,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027956079] [2021-07-13 20:28:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:23,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:23,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027956079] [2021-07-13 20:28:23,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027956079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:23,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990686241] [2021-07-13 20:28:23,670 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 [2021-07-13 20:28:23,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:23,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:28:23,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:24,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:28:24,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:24,314 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-13 20:28:24,322 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. [2021-07-13 20:28:24,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-13 20:28:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:24,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:24,467 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 [2021-07-13 20:28:24,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:24,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:24,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-13 20:28:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990686241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:24,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:24,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:28:24,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107623880] [2021-07-13 20:28:24,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:28:24,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:24,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:28:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:28:24,485 INFO L87 Difference]: Start difference. First operand 1424 states and 3042 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) [2021-07-13 20:28:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:26,709 INFO L93 Difference]: Finished difference Result 4414 states and 9437 transitions. [2021-07-13 20:28:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:28:26,709 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 [2021-07-13 20:28:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:26,719 INFO L225 Difference]: With dead ends: 4414 [2021-07-13 20:28:26,719 INFO L226 Difference]: Without dead ends: 4155 [2021-07-13 20:28:26,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1799.1ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:28:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-07-13 20:28:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-07-13 20:28:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.150985915492958) internal successors, (3818), 1775 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-07-13 20:28:26,759 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-07-13 20:28:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:26,759 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-07-13 20:28:26,759 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) [2021-07-13 20:28:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-07-13 20:28:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:28:26,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:26,784 INFO L508 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] [2021-07-13 20:28:26,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:26,984 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-07-13 20:28:26,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:26,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577665860] [2021-07-13 20:28:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:27,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:27,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577665860] [2021-07-13 20:28:27,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577665860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:27,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357375661] [2021-07-13 20:28:27,317 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 [2021-07-13 20:28:27,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:28:27,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:27,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:28:27,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:27,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:27,806 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 [2021-07-13 20:28:27,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:27,850 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-07-13 20:28:27,855 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. [2021-07-13 20:28:27,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-07-13 20:28:28,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:28,246 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 [2021-07-13 20:28:28,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:28:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,333 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-07-13 20:28:28,333 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 [2021-07-13 20:28:28,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:28,395 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-07-13 20:28:28,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:28:28,413 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-07-13 20:28:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:28,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357375661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:28,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:28,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-07-13 20:28:28,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148806672] [2021-07-13 20:28:28,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:28:28,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:28:28,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:28:28,516 INFO L87 Difference]: Start difference. First operand 1776 states and 3818 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) [2021-07-13 20:28:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:31,580 INFO L93 Difference]: Finished difference Result 3956 states and 8497 transitions. [2021-07-13 20:28:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:28:31,580 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 [2021-07-13 20:28:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:31,586 INFO L225 Difference]: With dead ends: 3956 [2021-07-13 20:28:31,586 INFO L226 Difference]: Without dead ends: 3795 [2021-07-13 20:28:31,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2573.6ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:28:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-07-13 20:28:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-07-13 20:28:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 2.1527851458885943) internal successors, (4058), 1885 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-07-13 20:28:31,616 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-07-13 20:28:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:31,616 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-07-13 20:28:31,616 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) [2021-07-13 20:28:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-07-13 20:28:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:28:31,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:31,619 INFO L508 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] [2021-07-13 20:28:31,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 20:28:31,833 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:31,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-07-13 20:28:31,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:31,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045208742] [2021-07-13 20:28:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:31,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:31,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045208742] [2021-07-13 20:28:31,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045208742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:31,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838305366] [2021-07-13 20:28:31,881 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 [2021-07-13 20:28:31,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:31,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:28:31,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:31,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838305366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:31,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:31,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-07-13 20:28:31,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013893207] [2021-07-13 20:28:31,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:28:31,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:31,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:28:31,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:28:31,973 INFO L87 Difference]: Start difference. First operand 1886 states and 4058 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) [2021-07-13 20:28:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:32,052 INFO L93 Difference]: Finished difference Result 2387 states and 5133 transitions. [2021-07-13 20:28:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:28:32,053 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 [2021-07-13 20:28:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:32,059 INFO L225 Difference]: With dead ends: 2387 [2021-07-13 20:28:32,059 INFO L226 Difference]: Without dead ends: 2337 [2021-07-13 20:28:32,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:28:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-07-13 20:28:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-07-13 20:28:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.163295510606808) internal successors, (4385), 2027 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-07-13 20:28:32,092 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-07-13 20:28:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:32,092 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-07-13 20:28:32,092 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) [2021-07-13 20:28:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-07-13 20:28:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 20:28:32,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:32,095 INFO L508 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] [2021-07-13 20:28:32,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:32,311 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-07-13 20:28:32,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:32,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129009769] [2021-07-13 20:28:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-13 20:28:32,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:32,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129009769] [2021-07-13 20:28:32,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129009769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:32,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377497697] [2021-07-13 20:28:32,338 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 [2021-07-13 20:28:32,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:28:32,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:32,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:28:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-13 20:28:32,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377497697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:32,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:32,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:28:32,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081382922] [2021-07-13 20:28:32,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:28:32,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:32,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:28:32,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:28:32,425 INFO L87 Difference]: Start difference. First operand 2028 states and 4385 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:32,447 INFO L93 Difference]: Finished difference Result 2477 states and 5328 transitions. [2021-07-13 20:28:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:28:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 20:28:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:32,451 INFO L225 Difference]: With dead ends: 2477 [2021-07-13 20:28:32,451 INFO L226 Difference]: Without dead ends: 2477 [2021-07-13 20:28:32,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:28:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-07-13 20:28:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-07-13 20:28:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.1648835745752044) internal successors, (3440), 1589 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-07-13 20:28:32,473 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-07-13 20:28:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:32,473 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-07-13 20:28:32,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-07-13 20:28:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 20:28:32,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:32,476 INFO L508 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] [2021-07-13 20:28:32,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:32,689 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-07-13 20:28:32,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:32,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775561071] [2021-07-13 20:28:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:28:32,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775561071] [2021-07-13 20:28:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775561071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972418849] [2021-07-13 20:28:32,718 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 [2021-07-13 20:28:32,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:28:32,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:28:32,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:28:32,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972418849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:32,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:32,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:28:32,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365554908] [2021-07-13 20:28:32,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:28:32,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:32,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:28:32,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:28:32,807 INFO L87 Difference]: Start difference. First operand 1590 states and 3440 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) [2021-07-13 20:28:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:32,833 INFO L93 Difference]: Finished difference Result 1749 states and 3746 transitions. [2021-07-13 20:28:32,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:28:32,833 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 [2021-07-13 20:28:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:32,836 INFO L225 Difference]: With dead ends: 1749 [2021-07-13 20:28:32,836 INFO L226 Difference]: Without dead ends: 1749 [2021-07-13 20:28:32,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:28:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-07-13 20:28:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-07-13 20:28:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.1494584837545125) internal successors, (2977), 1385 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-07-13 20:28:32,859 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-07-13 20:28:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:32,859 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-07-13 20:28:32,859 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) [2021-07-13 20:28:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-07-13 20:28:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:28:32,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:32,861 INFO L508 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] [2021-07-13 20:28:33,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-07-13 20:28:33,071 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-07-13 20:28:33,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:33,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516318576] [2021-07-13 20:28:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:33,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:33,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516318576] [2021-07-13 20:28:33,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516318576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:33,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757342194] [2021-07-13 20:28:33,659 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 [2021-07-13 20:28:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:33,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:28:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:34,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:34,201 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 [2021-07-13 20:28:34,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:34,290 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-07-13 20:28:34,309 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. [2021-07-13 20:28:34,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-07-13 20:28:34,705 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:28:34,706 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 [2021-07-13 20:28:34,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:34,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:34,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:34,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-07-13 20:28:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:34,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757342194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:34,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:34,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-07-13 20:28:34,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101112245] [2021-07-13 20:28:34,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 20:28:34,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:34,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 20:28:34,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:28:34,719 INFO L87 Difference]: Start difference. First operand 1386 states and 2977 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) [2021-07-13 20:28:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:38,022 INFO L93 Difference]: Finished difference Result 2993 states and 6367 transitions. [2021-07-13 20:28:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:28:38,023 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 [2021-07-13 20:28:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:38,027 INFO L225 Difference]: With dead ends: 2993 [2021-07-13 20:28:38,027 INFO L226 Difference]: Without dead ends: 2897 [2021-07-13 20:28:38,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2570.2ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:28:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-07-13 20:28:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-07-13 20:28:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.159106296547055) internal successors, (3189), 1477 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-07-13 20:28:38,049 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-07-13 20:28:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:38,049 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-07-13 20:28:38,049 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) [2021-07-13 20:28:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-07-13 20:28:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:28:38,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:38,051 INFO L508 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] [2021-07-13 20:28:38,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:38,255 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-07-13 20:28:38,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:38,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886176325] [2021-07-13 20:28:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:28:38,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:38,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886176325] [2021-07-13 20:28:38,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886176325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:38,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840286615] [2021-07-13 20:28:38,736 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 [2021-07-13 20:28:38,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:38,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:38,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:28:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:39,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:39,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:28:39,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:39,998 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-07-13 20:28:40,020 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. [2021-07-13 20:28:40,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-07-13 20:28:40,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:40,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:40,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:40,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:40,490 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 [2021-07-13 20:28:40,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:40,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:40,501 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 [2021-07-13 20:28:40,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:40,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:40,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:40,509 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-07-13 20:28:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:40,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840286615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:40,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:40,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-07-13 20:28:40,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518582046] [2021-07-13 20:28:40,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:28:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:28:40,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:28:40,518 INFO L87 Difference]: Start difference. First operand 1478 states and 3189 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) [2021-07-13 20:28:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:45,994 INFO L93 Difference]: Finished difference Result 3235 states and 6875 transitions. [2021-07-13 20:28:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:28:45,995 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 [2021-07-13 20:28:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:46,000 INFO L225 Difference]: With dead ends: 3235 [2021-07-13 20:28:46,000 INFO L226 Difference]: Without dead ends: 3122 [2021-07-13 20:28:46,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4194.5ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-07-13 20:28:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-07-13 20:28:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-07-13 20:28:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.1580645161290324) internal successors, (3345), 1550 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-07-13 20:28:46,054 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-07-13 20:28:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:46,054 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-07-13 20:28:46,054 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) [2021-07-13 20:28:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-07-13 20:28:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:28:46,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:46,056 INFO L508 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] [2021-07-13 20:28:46,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-07-13 20:28:46,273 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:46,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-07-13 20:28:46,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:46,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145949327] [2021-07-13 20:28:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:46,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:46,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145949327] [2021-07-13 20:28:46,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145949327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:46,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638827263] [2021-07-13 20:28:46,752 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 [2021-07-13 20:28:46,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:28:46,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:28:46,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:49,349 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:28:49,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:49,473 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 [2021-07-13 20:28:49,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:49,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:49,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:28:49,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:49,725 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-07-13 20:28:49,725 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-07-13 20:28:49,788 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. [2021-07-13 20:28:49,788 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-07-13 20:29:04,810 WARN L205 SmtUtils]: Spent 8.35 s on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:29:25,381 WARN L205 SmtUtils]: Spent 7.63 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-07-13 20:29:25,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:25,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:25,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:25,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:25,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:25,673 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-07-13 20:29:25,673 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 [2021-07-13 20:29:25,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:25,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:25,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:25,952 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 [2021-07-13 20:29:26,587 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-07-13 20:29:26,703 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-07-13 20:29:26,834 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-07-13 20:29:27,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-13 20:29:27,664 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-07-13 20:29:27,665 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-07-13 20:29:27,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:29:27,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-07-13 20:29:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:27,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638827263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:27,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:27,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-07-13 20:29:27,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81992232] [2021-07-13 20:29:27,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:29:27,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:27,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:29:27,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2266, Unknown=5, NotChecked=0, Total=2550 [2021-07-13 20:29:27,800 INFO L87 Difference]: Start difference. First operand 1551 states and 3345 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) [2021-07-13 20:29:44,705 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-07-13 20:29:53,518 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-07-13 20:30:11,551 WARN L205 SmtUtils]: Spent 8.47 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-07-13 20:30:24,151 WARN L205 SmtUtils]: Spent 6.52 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-07-13 20:30:38,475 WARN L205 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-07-13 20:30:45,992 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-07-13 20:31:04,009 WARN L205 SmtUtils]: Spent 12.80 s on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2021-07-13 20:31:08,547 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2021-07-13 20:31:18,557 WARN L205 SmtUtils]: Spent 7.19 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-07-13 20:31:32,417 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-07-13 20:31:41,264 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2021-07-13 20:31:44,651 WARN L205 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 122 DAG size of output: 48 [2021-07-13 20:31:53,788 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-07-13 20:31:58,528 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-07-13 20:32:06,623 WARN L205 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-07-13 20:32:26,699 WARN L205 SmtUtils]: Spent 14.82 s on a formula simplification. DAG size of input: 119 DAG size of output: 70 [2021-07-13 20:32:35,795 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-07-13 20:32:42,875 WARN L205 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-07-13 20:33:07,687 WARN L205 SmtUtils]: Spent 14.88 s on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2021-07-13 20:33:14,917 WARN L205 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-07-13 20:33:29,402 WARN L205 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-07-13 20:33:43,837 WARN L205 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-07-13 20:33:54,234 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-07-13 20:34:03,761 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-07-13 20:34:27,831 WARN L205 SmtUtils]: Spent 12.91 s on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2021-07-13 20:34:55,799 WARN L205 SmtUtils]: Spent 14.02 s on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-07-13 20:35:00,564 WARN L205 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-07-13 20:35:25,279 WARN L205 SmtUtils]: Spent 15.88 s on a formula simplification. DAG size of input: 126 DAG size of output: 75 [2021-07-13 20:35:46,930 WARN L205 SmtUtils]: Spent 13.40 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-07-13 20:36:11,267 WARN L205 SmtUtils]: Spent 13.37 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2021-07-13 20:36:22,405 WARN L205 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-07-13 20:36:33,196 WARN L205 SmtUtils]: Spent 6.59 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-07-13 20:36:58,834 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2021-07-13 20:37:28,275 WARN L205 SmtUtils]: Spent 13.66 s on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2021-07-13 20:37:41,900 WARN L205 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-07-13 20:37:57,583 WARN L205 SmtUtils]: Spent 9.10 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:38:10,319 WARN L205 SmtUtils]: Spent 5.95 s on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-07-13 20:38:52,541 WARN L205 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2021-07-13 20:39:10,321 WARN L205 SmtUtils]: Spent 11.20 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-07-13 20:39:24,004 WARN L205 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-07-13 20:39:32,405 WARN L205 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-07-13 20:39:57,254 WARN L205 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-07-13 20:40:20,878 WARN L205 SmtUtils]: Spent 13.70 s on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-07-13 20:40:50,093 WARN L205 SmtUtils]: Spent 13.60 s on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2021-07-13 20:41:20,661 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 118 DAG size of output: 66 [2021-07-13 20:41:51,051 WARN L205 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2021-07-13 20:42:06,769 WARN L205 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 92 DAG size of output: 66 Received shutdown request... [2021-07-13 20:42:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-07-13 20:42:18,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:42:18,187 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:42:18,189 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:42:18,190 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:42:18,190 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:42:18 BasicIcfg [2021-07-13 20:42:18,190 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:42:18,190 INFO L168 Benchmark]: Toolchain (without parser) took 879233.50 ms. Allocated memory was 192.9 MB in the beginning and 418.4 MB in the end (delta: 225.4 MB). Free memory was 171.6 MB in the beginning and 205.3 MB in the end (delta: -33.7 MB). Peak memory consumption was 192.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:42:18,191 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 192.9 MB. Free memory is still 172.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:42:18,191 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.53 ms. Allocated memory is still 192.9 MB. Free memory was 171.6 MB in the beginning and 170.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:42:18,191 INFO L168 Benchmark]: Boogie Preprocessor took 11.87 ms. Allocated memory is still 192.9 MB. Free memory was 170.2 MB in the beginning and 169.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:42:18,191 INFO L168 Benchmark]: RCFGBuilder took 239.39 ms. Allocated memory is still 192.9 MB. Free memory was 169.2 MB in the beginning and 156.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:42:18,191 INFO L168 Benchmark]: TraceAbstraction took 878956.14 ms. Allocated memory was 192.9 MB in the beginning and 418.4 MB in the end (delta: 225.4 MB). Free memory was 155.8 MB in the beginning and 205.3 MB in the end (delta: -49.5 MB). Peak memory consumption was 176.9 MB. Max. memory is 8.0 GB. [2021-07-13 20:42:18,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 192.9 MB. Free memory is still 172.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.53 ms. Allocated memory is still 192.9 MB. Free memory was 171.6 MB in the beginning and 170.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.87 ms. Allocated memory is still 192.9 MB. Free memory was 170.2 MB in the beginning and 169.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 239.39 ms. Allocated memory is still 192.9 MB. Free memory was 169.2 MB in the beginning and 156.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 878956.14 ms. Allocated memory was 192.9 MB in the beginning and 418.4 MB in the end (delta: 225.4 MB). Free memory was 155.8 MB in the beginning and 205.3 MB in the end (delta: -49.5 MB). Peak memory consumption was 176.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 115 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 153 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 878898.4ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 68.9ms, AutomataDifference: 814853.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 38.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1085 SDtfs, 5835 SDslu, 10527 SDs, 0 SdLazy, 26658 SolverSat, 3507 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 88723.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1847 GetRequests, 588 SyntacticMatches, 38 SemanticMatches, 1220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41238 ImplicationChecksByTransitivity, 762559.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=18, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 459.5ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 99.1ms SsaConstructionTime, 395.7ms SatisfiabilityAnalysisTime, 57911.8ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 268 QuantifiedInterpolants, 27388 SizeOfPredicates, 223 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 544 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 260/1315 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