/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.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:25:20,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:25:20,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:25:20,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:25:20,083 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 [2021-07-09 18:25:20,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:25:20,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:25:20,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:25:20,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:25:20,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:25:20,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:25:20,103 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:25:20,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:25:20,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:25:20,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:25:20,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:25:20,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:25:20,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:25:20,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:25:20,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:25:20,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:25:20,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:25:20,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:25:20,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:25:20,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:25:20,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:25:20,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:25:20,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:25:20,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:25:20,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:25:20,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:25:20,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:25:20,364 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:25:20,365 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:25:20,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2021-07-09 18:25:20,366 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2021-07-09 18:25:20,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:25:20,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:25:20,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:25:20,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:25:20,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:25:20,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:25:20,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:25:20,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:25:20,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:25:20,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... [2021-07-09 18:25:20,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:25:20,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:25:20,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:25:20,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:25:20,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:25:20,501 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:25:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:25:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:25:20,502 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:25:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:25:20,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:25:20,502 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:25:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:25:20,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:25:20,503 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:25:20,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:25:20,660 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:25:20,662 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:25:20 BoogieIcfgContainer [2021-07-09 18:25:20,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:25:20,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:25:20,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:25:20,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:25:20,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:25:20" (1/2) ... [2021-07-09 18:25:20,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77481f2c and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:25:20, skipping insertion in model container [2021-07-09 18:25:20,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:25:20" (2/2) ... [2021-07-09 18:25:20,667 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2021-07-09 18:25:20,670 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:25:20,670 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:25:20,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:25:20,671 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:25:20,691 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:25:20,706 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:25:20,726 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:25:20,726 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:25:20,726 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:25:20,726 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:25:20,726 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:25:20,726 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:25:20,726 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:25:20,726 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:25:20,736 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-07-09 18:25:20,752 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) [2021-07-09 18:25:20,754 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) [2021-07-09 18:25:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 18:25:20,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:20,760 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:20,760 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:20,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:20,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-07-09 18:25:20,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:20,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006375977] [2021-07-09 18:25:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:20,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:20,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006375977] [2021-07-09 18:25:20,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006375977] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:25:20,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:25:20,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:25:20,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112614241] [2021-07-09 18:25:20,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:25:20,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:20,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:25:20,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:25:20,910 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) [2021-07-09 18:25:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:20,941 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-07-09 18:25:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:25:20,942 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 [2021-07-09 18:25:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:20,949 INFO L225 Difference]: With dead ends: 104 [2021-07-09 18:25:20,949 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 18:25:20,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:25:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 18:25:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-07-09 18:25:20,995 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) [2021-07-09 18:25:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-07-09 18:25:21,000 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-07-09 18:25:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:21,000 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-07-09 18:25:21,000 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) [2021-07-09 18:25:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-07-09 18:25:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:25:21,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:21,002 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:21,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:25:21,002 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-07-09 18:25:21,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:21,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939677195] [2021-07-09 18:25:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:21,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939677195] [2021-07-09 18:25:21,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939677195] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:25:21,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:25:21,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:25:21,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744834137] [2021-07-09 18:25:21,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:25:21,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:21,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:25:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:25:21,061 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) [2021-07-09 18:25:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:21,085 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-07-09 18:25:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:25:21,085 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 [2021-07-09 18:25:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:21,086 INFO L225 Difference]: With dead ends: 91 [2021-07-09 18:25:21,086 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 18:25:21,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:25:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 18:25:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-07-09 18:25:21,092 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) [2021-07-09 18:25:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-07-09 18:25:21,093 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-07-09 18:25:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:21,093 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-07-09 18:25:21,093 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) [2021-07-09 18:25:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-07-09 18:25:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:25:21,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:21,094 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] [2021-07-09 18:25:21,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:25:21,094 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:21,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-07-09 18:25:21,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:21,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413997680] [2021-07-09 18:25:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:21,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413997680] [2021-07-09 18:25:21,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413997680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671563244] [2021-07-09 18:25:21,209 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 [2021-07-09 18:25:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:21,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:25:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 18:25:21,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:21,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:21,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:21,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-07-09 18:25:21,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:25:21,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:21,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:21,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:21,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-07-09 18:25:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671563244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:21,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:25:21,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174272678] [2021-07-09 18:25:21,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:25:21,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:21,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:25:21,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:25:21,495 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) [2021-07-09 18:25:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:21,573 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-07-09 18:25:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:25:21,573 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 [2021-07-09 18:25:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:21,577 INFO L225 Difference]: With dead ends: 154 [2021-07-09 18:25:21,577 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 18:25:21,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:25:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 18:25:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-07-09 18:25:21,593 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) [2021-07-09 18:25:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-07-09 18:25:21,594 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-07-09 18:25:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:21,594 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-07-09 18:25:21,594 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) [2021-07-09 18:25:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-07-09 18:25:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:21,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:21,595 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] [2021-07-09 18:25:21,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:25:21,796 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:21,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-07-09 18:25:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:21,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887111256] [2021-07-09 18:25:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:21,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887111256] [2021-07-09 18:25:21,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887111256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472778872] [2021-07-09 18:25:21,834 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 [2021-07-09 18:25:21,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:21,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:21,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:25:21,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472778872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:21,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-09 18:25:21,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288744908] [2021-07-09 18:25:21,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:25:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:25:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:25:21,953 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) [2021-07-09 18:25:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:22,022 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-07-09 18:25:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:25:22,022 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 [2021-07-09 18:25:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:22,024 INFO L225 Difference]: With dead ends: 284 [2021-07-09 18:25:22,024 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 18:25:22,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:25:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 18:25:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-07-09 18:25:22,042 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) [2021-07-09 18:25:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-07-09 18:25:22,046 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-07-09 18:25:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:22,046 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-07-09 18:25:22,046 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) [2021-07-09 18:25:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-07-09 18:25:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:25:22,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:22,052 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] [2021-07-09 18:25:22,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:22,265 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:22,265 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-07-09 18:25:22,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:22,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939946929] [2021-07-09 18:25:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:22,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:22,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939946929] [2021-07-09 18:25:22,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939946929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:22,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832009196] [2021-07-09 18:25:22,512 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 [2021-07-09 18:25:22,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:25:22,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:22,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:22,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:22,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:22,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:25:22,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:22,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:22,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:22,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-07-09 18:25:22,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:22,867 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 [2021-07-09 18:25:22,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:22,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:22,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:22,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-07-09 18:25:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:23,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832009196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:23,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:23,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-07-09 18:25:23,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645611264] [2021-07-09 18:25:23,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:23,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:23,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:23,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:23,034 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) [2021-07-09 18:25:25,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:25,023 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-07-09 18:25:25,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:25:25,024 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 [2021-07-09 18:25:25,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:25,026 INFO L225 Difference]: With dead ends: 650 [2021-07-09 18:25:25,026 INFO L226 Difference]: Without dead ends: 573 [2021-07-09 18:25:25,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1389.0ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:25:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-09 18:25:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-07-09 18:25:25,034 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) [2021-07-09 18:25:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-07-09 18:25:25,035 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-07-09 18:25:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:25,036 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-07-09 18:25:25,036 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) [2021-07-09 18:25:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-07-09 18:25:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:25:25,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:25,037 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] [2021-07-09 18:25:25,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:25,256 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-07-09 18:25:25,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:25,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182265274] [2021-07-09 18:25:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:25,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182265274] [2021-07-09 18:25:25,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182265274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:25,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935438711] [2021-07-09 18:25:25,502 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 [2021-07-09 18:25:25,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:25,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:25:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:25,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:25:25,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:25,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:25,857 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. [2021-07-09 18:25:25,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-09 18:25:25,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:25,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:25:25,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:25,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:25,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:25,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-09 18:25:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:25,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935438711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:25,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:25,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-09 18:25:25,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888470674] [2021-07-09 18:25:25,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:25:25,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:25,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:25:25,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:25:25,956 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) [2021-07-09 18:25:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:26,547 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-07-09 18:25:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:25:26,548 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 [2021-07-09 18:25:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:26,551 INFO L225 Difference]: With dead ends: 1023 [2021-07-09 18:25:26,551 INFO L226 Difference]: Without dead ends: 878 [2021-07-09 18:25:26,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:25:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-09 18:25:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-07-09 18:25:26,560 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) [2021-07-09 18:25:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-07-09 18:25:26,562 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-07-09 18:25:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:26,562 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-07-09 18:25:26,562 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) [2021-07-09 18:25:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-07-09 18:25:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:25:26,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:26,563 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] [2021-07-09 18:25:26,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:26,777 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:26,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-07-09 18:25:26,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:26,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570440211] [2021-07-09 18:25:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:26,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570440211] [2021-07-09 18:25:26,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570440211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183710331] [2021-07-09 18:25:26,951 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 [2021-07-09 18:25:26,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:25:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:26,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:27,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:27,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:25:27,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:27,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:27,205 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. [2021-07-09 18:25:27,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-07-09 18:25:27,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:27,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:27,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:25:27,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:27,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:27,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:27,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-07-09 18:25:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:27,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183710331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:27,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:27,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-09 18:25:27,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906801362] [2021-07-09 18:25:27,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:25:27,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:27,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:25:27,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:25:27,317 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) [2021-07-09 18:25:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:28,027 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-07-09 18:25:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:25:28,028 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 [2021-07-09 18:25:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:28,033 INFO L225 Difference]: With dead ends: 1081 [2021-07-09 18:25:28,033 INFO L226 Difference]: Without dead ends: 927 [2021-07-09 18:25:28,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 600.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:25:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-09 18:25:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-07-09 18:25:28,043 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) [2021-07-09 18:25:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-07-09 18:25:28,046 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-07-09 18:25:28,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:28,046 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-07-09 18:25:28,047 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) [2021-07-09 18:25:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-07-09 18:25:28,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:25:28,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:28,048 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] [2021-07-09 18:25:28,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:25:28,261 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-07-09 18:25:28,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:28,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151950706] [2021-07-09 18:25:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:28,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:28,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151950706] [2021-07-09 18:25:28,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151950706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:28,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965055572] [2021-07-09 18:25:28,477 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 [2021-07-09 18:25:28,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:25:28,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:28,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:28,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:25:28,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:28,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:28,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:28,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-07-09 18:25:28,772 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:28,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-07-09 18:25:28,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:28,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:28,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:28,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-07-09 18:25:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:28,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965055572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:28,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:28,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-09 18:25:28,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939074385] [2021-07-09 18:25:28,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:28,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:28,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:28,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:28,798 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) [2021-07-09 18:25:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:29,646 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-07-09 18:25:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:25:29,646 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 [2021-07-09 18:25:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:29,649 INFO L225 Difference]: With dead ends: 1050 [2021-07-09 18:25:29,649 INFO L226 Difference]: Without dead ends: 939 [2021-07-09 18:25:29,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 739.2ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:25:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-09 18:25:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-07-09 18:25:29,658 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) [2021-07-09 18:25:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-07-09 18:25:29,659 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-07-09 18:25:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:29,659 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-07-09 18:25:29,659 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) [2021-07-09 18:25:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-07-09 18:25:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:25:29,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:29,660 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] [2021-07-09 18:25:29,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:29,873 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-07-09 18:25:29,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:29,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718258864] [2021-07-09 18:25:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:30,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718258864] [2021-07-09 18:25:30,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718258864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653679553] [2021-07-09 18:25:30,060 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 [2021-07-09 18:25:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:25:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:30,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:30,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:25:30,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:30,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:30,301 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. [2021-07-09 18:25:30,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-09 18:25:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:30,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:30,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-07-09 18:25:30,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:30,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:30,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:30,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-09 18:25:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:30,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653679553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:30,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:30,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-09 18:25:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361247279] [2021-07-09 18:25:30,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:25:30,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:25:30,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:25:30,417 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) [2021-07-09 18:25:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:30,929 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-07-09 18:25:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:25:30,930 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 [2021-07-09 18:25:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:30,933 INFO L225 Difference]: With dead ends: 1045 [2021-07-09 18:25:30,933 INFO L226 Difference]: Without dead ends: 947 [2021-07-09 18:25:30,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:25:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-07-09 18:25:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-07-09 18:25:30,942 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) [2021-07-09 18:25:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-07-09 18:25:30,943 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-07-09 18:25:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:30,944 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-07-09 18:25:30,944 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) [2021-07-09 18:25:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-07-09 18:25:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:25:30,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:30,945 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] [2021-07-09 18:25:31,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:31,157 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-07-09 18:25:31,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:31,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158162277] [2021-07-09 18:25:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:31,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158162277] [2021-07-09 18:25:31,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158162277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147447483] [2021-07-09 18:25:31,204 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 [2021-07-09 18:25:31,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:31,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:25:31,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:31,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147447483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:31,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-07-09 18:25:31,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508284527] [2021-07-09 18:25:31,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:25:31,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:31,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:25:31,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:25:31,287 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) [2021-07-09 18:25:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:31,351 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-07-09 18:25:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:25:31,352 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 [2021-07-09 18:25:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:31,355 INFO L225 Difference]: With dead ends: 882 [2021-07-09 18:25:31,355 INFO L226 Difference]: Without dead ends: 844 [2021-07-09 18:25:31,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:25:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-07-09 18:25:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-07-09 18:25:31,365 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) [2021-07-09 18:25:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-07-09 18:25:31,367 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-07-09 18:25:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:31,367 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-07-09 18:25:31,367 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) [2021-07-09 18:25:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-07-09 18:25:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:31,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:31,368 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] [2021-07-09 18:25:31,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:25:31,585 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-07-09 18:25:31,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:31,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335493319] [2021-07-09 18:25:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:31,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:31,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335493319] [2021-07-09 18:25:31,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335493319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137137741] [2021-07-09 18:25:31,952 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 [2021-07-09 18:25:31,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:25:31,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:25:31,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:32,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-09 18:25:32,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:32,312 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-07-09 18:25:32,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:32,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-07-09 18:25:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:32,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,611 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 [2021-07-09 18:25:32,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:32,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:32,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-07-09 18:25:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:32,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137137741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:32,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:32,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-07-09 18:25:32,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555729625] [2021-07-09 18:25:32,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:25:32,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:32,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:25:32,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:25:32,697 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) [2021-07-09 18:25:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:36,531 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-07-09 18:25:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:25:36,532 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 [2021-07-09 18:25:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:36,539 INFO L225 Difference]: With dead ends: 2812 [2021-07-09 18:25:36,539 INFO L226 Difference]: Without dead ends: 2548 [2021-07-09 18:25:36,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3053.0ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-07-09 18:25:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-07-09 18:25:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-07-09 18:25:36,569 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) [2021-07-09 18:25:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-07-09 18:25:36,571 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-07-09 18:25:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:36,571 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-07-09 18:25:36,571 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) [2021-07-09 18:25:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-07-09 18:25:36,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:36,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:36,572 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] [2021-07-09 18:25:36,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:36,789 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-07-09 18:25:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:36,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870887632] [2021-07-09 18:25:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:37,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:37,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870887632] [2021-07-09 18:25:37,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870887632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:37,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382719729] [2021-07-09 18:25:37,162 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 [2021-07-09 18:25:37,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:37,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:25:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:37,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-09 18:25:37,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:37,854 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-09 18:25:37,864 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. [2021-07-09 18:25:37,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-09 18:25:38,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:38,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:38,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:38,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:38,193 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 [2021-07-09 18:25:38,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:38,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:38,206 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 [2021-07-09 18:25:38,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:38,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:38,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:38,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-07-09 18:25:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:38,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382719729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:38,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:38,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-09 18:25:38,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141752029] [2021-07-09 18:25:38,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:25:38,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:38,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:25:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:25:38,238 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) [2021-07-09 18:25:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:40,240 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-07-09 18:25:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:25:40,240 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 [2021-07-09 18:25:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:40,247 INFO L225 Difference]: With dead ends: 2302 [2021-07-09 18:25:40,247 INFO L226 Difference]: Without dead ends: 2145 [2021-07-09 18:25:40,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1803.9ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:25:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-09 18:25:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-07-09 18:25:40,266 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) [2021-07-09 18:25:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-07-09 18:25:40,267 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-07-09 18:25:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:40,267 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-07-09 18:25:40,267 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) [2021-07-09 18:25:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-07-09 18:25:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:40,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:40,269 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] [2021-07-09 18:25:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:25:40,485 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-07-09 18:25:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:40,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491023881] [2021-07-09 18:25:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:40,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:40,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491023881] [2021-07-09 18:25:40,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491023881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:40,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441456849] [2021-07-09 18:25:40,806 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 [2021-07-09 18:25:40,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:25:40,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:40,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:25:40,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:41,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:41,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-09 18:25:41,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:41,385 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-07-09 18:25:41,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:41,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-07-09 18:25:41,466 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:25:41,466 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 [2021-07-09 18:25:41,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:41,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:41,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:41,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-07-09 18:25:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:41,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441456849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:41,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:41,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-09 18:25:41,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252579688] [2021-07-09 18:25:41,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:25:41,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:41,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:25:41,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:25:41,481 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) [2021-07-09 18:25:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:43,365 INFO L93 Difference]: Finished difference Result 2428 states and 5151 transitions. [2021-07-09 18:25:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:25:43,366 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 [2021-07-09 18:25:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:43,372 INFO L225 Difference]: With dead ends: 2428 [2021-07-09 18:25:43,372 INFO L226 Difference]: Without dead ends: 2232 [2021-07-09 18:25:43,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1618.9ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:25:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-07-09 18:25:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-07-09 18:25:43,392 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) [2021-07-09 18:25:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-07-09 18:25:43,394 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-07-09 18:25:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:43,394 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-07-09 18:25:43,394 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) [2021-07-09 18:25:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-07-09 18:25:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:43,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:43,395 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] [2021-07-09 18:25:43,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:25:43,598 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:43,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-07-09 18:25:43,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:43,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793702503] [2021-07-09 18:25:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:43,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:43,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793702503] [2021-07-09 18:25:43,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793702503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:43,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157484534] [2021-07-09 18:25:43,918 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 [2021-07-09 18:25:43,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:25:43,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:25:43,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:44,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:44,691 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 [2021-07-09 18:25:44,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:44,778 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-07-09 18:25:44,790 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. [2021-07-09 18:25:44,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-07-09 18:25:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:45,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:45,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 63 [2021-07-09 18:25:45,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:25:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:45,516 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-07-09 18:25:45,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-07-09 18:25:45,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:45,537 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-07-09 18:25:45,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:45,540 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-07-09 18:25:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:45,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157484534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:45,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:45,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-07-09 18:25:45,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775675705] [2021-07-09 18:25:45,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:25:45,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:45,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:25:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:25:45,613 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) [2021-07-09 18:25:46,847 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-07-09 18:25:47,322 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-07-09 18:25:51,874 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:25:59,037 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-09 18:26:00,166 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-09 18:26:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:00,395 INFO L93 Difference]: Finished difference Result 4013 states and 8575 transitions. [2021-07-09 18:26:00,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-07-09 18:26:00,396 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 [2021-07-09 18:26:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:00,410 INFO L225 Difference]: With dead ends: 4013 [2021-07-09 18:26:00,410 INFO L226 Difference]: Without dead ends: 3813 [2021-07-09 18:26:00,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 11803.4ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-07-09 18:26:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-07-09 18:26:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-07-09 18:26:00,442 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) [2021-07-09 18:26:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-07-09 18:26:00,444 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-07-09 18:26:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:00,444 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-07-09 18:26:00,445 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) [2021-07-09 18:26:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-07-09 18:26:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:26:00,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:00,446 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] [2021-07-09 18:26:00,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:00,661 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-07-09 18:26:00,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:00,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004760292] [2021-07-09 18:26:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:00,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:00,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004760292] [2021-07-09 18:26:00,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004760292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:00,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389734713] [2021-07-09 18:26:00,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:26:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:00,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:26:01,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:01,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:01,555 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 [2021-07-09 18:26:01,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:01,601 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-07-09 18:26:01,606 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. [2021-07-09 18:26:01,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-07-09 18:26:01,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:01,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:01,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:01,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:01,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:01,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:01,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:01,690 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 [2021-07-09 18:26:01,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:01,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:01,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:01,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-09 18:26:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:01,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389734713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:01,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:01,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-09 18:26:01,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165009052] [2021-07-09 18:26:01,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:26:01,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:26:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:26:01,706 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) [2021-07-09 18:26:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:03,699 INFO L93 Difference]: Finished difference Result 4028 states and 8625 transitions. [2021-07-09 18:26:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:26:03,699 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 [2021-07-09 18:26:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:03,709 INFO L225 Difference]: With dead ends: 4028 [2021-07-09 18:26:03,709 INFO L226 Difference]: Without dead ends: 3805 [2021-07-09 18:26:03,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1448.2ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:26:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-07-09 18:26:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-07-09 18:26:03,739 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) [2021-07-09 18:26:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-07-09 18:26:03,743 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-07-09 18:26:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:03,743 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-07-09 18:26:03,743 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) [2021-07-09 18:26:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-07-09 18:26:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:26:03,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:03,750 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] [2021-07-09 18:26:03,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:26:03,951 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-07-09 18:26:03,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:03,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473487641] [2021-07-09 18:26:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:04,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:04,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473487641] [2021-07-09 18:26:04,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473487641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:04,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233687128] [2021-07-09 18:26:04,319 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 [2021-07-09 18:26:04,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:04,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:04,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:26:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:04,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:04,924 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 [2021-07-09 18:26:04,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:04,969 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-09 18:26:04,978 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. [2021-07-09 18:26:04,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-09 18:26:05,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:05,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:05,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:05,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:05,113 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 [2021-07-09 18:26:05,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:05,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:05,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:05,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-09 18:26:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:05,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233687128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:05,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:05,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-09 18:26:05,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697656461] [2021-07-09 18:26:05,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:26:05,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:05,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:26:05,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:26:05,129 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) [2021-07-09 18:26:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:07,260 INFO L93 Difference]: Finished difference Result 4414 states and 9437 transitions. [2021-07-09 18:26:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:26:07,265 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 [2021-07-09 18:26:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:07,272 INFO L225 Difference]: With dead ends: 4414 [2021-07-09 18:26:07,272 INFO L226 Difference]: Without dead ends: 4155 [2021-07-09 18:26:07,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1743.3ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:26:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-07-09 18:26:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-07-09 18:26:07,309 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) [2021-07-09 18:26:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-07-09 18:26:07,312 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-07-09 18:26:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:07,312 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-07-09 18:26:07,313 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) [2021-07-09 18:26:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-07-09 18:26:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:26:07,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:07,316 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] [2021-07-09 18:26:07,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:07,525 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-07-09 18:26:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:07,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829947220] [2021-07-09 18:26:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:07,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:07,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829947220] [2021-07-09 18:26:07,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829947220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:07,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802047926] [2021-07-09 18:26:07,853 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 [2021-07-09 18:26:07,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:26:07,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:26:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:08,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:08,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-09 18:26:08,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:08,373 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-07-09 18:26:08,382 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. [2021-07-09 18:26:08,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-07-09 18:26:08,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,737 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-07-09 18:26:08,738 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 [2021-07-09 18:26:08,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:08,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:08,775 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 [2021-07-09 18:26:08,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 18:26:08,880 INFO L628 ElimStorePlain]: treesize reduction 43, result has 64.2 percent of original size [2021-07-09 18:26:08,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:26:08,894 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-07-09 18:26:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:08,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802047926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:08,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:08,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-07-09 18:26:08,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366443841] [2021-07-09 18:26:08,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:26:08,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:26:08,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:26:08,988 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) [2021-07-09 18:26:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:11,859 INFO L93 Difference]: Finished difference Result 3956 states and 8497 transitions. [2021-07-09 18:26:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:26:11,859 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 [2021-07-09 18:26:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:11,865 INFO L225 Difference]: With dead ends: 3956 [2021-07-09 18:26:11,865 INFO L226 Difference]: Without dead ends: 3795 [2021-07-09 18:26:11,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2430.2ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:26:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-07-09 18:26:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-07-09 18:26:11,895 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) [2021-07-09 18:26:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-07-09 18:26:11,899 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-07-09 18:26:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:11,899 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-07-09 18:26:11,899 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) [2021-07-09 18:26:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-07-09 18:26:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:26:11,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:11,902 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] [2021-07-09 18:26:12,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 18:26:12,117 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:12,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-07-09 18:26:12,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:12,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042451719] [2021-07-09 18:26:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:12,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:12,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042451719] [2021-07-09 18:26:12,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042451719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:12,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065987948] [2021-07-09 18:26:12,176 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 [2021-07-09 18:26:12,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:12,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:12,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:26:12,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:12,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065987948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:12,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:12,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-07-09 18:26:12,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133468323] [2021-07-09 18:26:12,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:26:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:26:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:26:12,258 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) [2021-07-09 18:26:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:12,333 INFO L93 Difference]: Finished difference Result 2387 states and 5133 transitions. [2021-07-09 18:26:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:26:12,333 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 [2021-07-09 18:26:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:12,337 INFO L225 Difference]: With dead ends: 2387 [2021-07-09 18:26:12,337 INFO L226 Difference]: Without dead ends: 2337 [2021-07-09 18:26:12,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:26:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-07-09 18:26:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-07-09 18:26:12,359 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) [2021-07-09 18:26:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-07-09 18:26:12,363 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-07-09 18:26:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:12,363 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-07-09 18:26:12,363 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) [2021-07-09 18:26:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-07-09 18:26:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 18:26:12,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:12,374 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] [2021-07-09 18:26:12,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 18:26:12,585 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-07-09 18:26:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575132354] [2021-07-09 18:26:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-09 18:26:12,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:12,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575132354] [2021-07-09 18:26:12,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575132354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710459761] [2021-07-09 18:26:12,609 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 [2021-07-09 18:26:12,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:26:12,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:26:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-09 18:26:12,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710459761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:12,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:12,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:26:12,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256472323] [2021-07-09 18:26:12,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:26:12,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:26:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:26:12,692 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) [2021-07-09 18:26:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:12,712 INFO L93 Difference]: Finished difference Result 2477 states and 5328 transitions. [2021-07-09 18:26:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:26:12,712 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 [2021-07-09 18:26:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:12,716 INFO L225 Difference]: With dead ends: 2477 [2021-07-09 18:26:12,716 INFO L226 Difference]: Without dead ends: 2477 [2021-07-09 18:26:12,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:26:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-07-09 18:26:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-07-09 18:26:12,738 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) [2021-07-09 18:26:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-07-09 18:26:12,741 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-07-09 18:26:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:12,742 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-07-09 18:26:12,742 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) [2021-07-09 18:26:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-07-09 18:26:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 18:26:12,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:12,744 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] [2021-07-09 18:26:12,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-09 18:26:12,961 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-07-09 18:26:12,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:12,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991508909] [2021-07-09 18:26:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:26:12,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:12,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991508909] [2021-07-09 18:26:12,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991508909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:12,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435841639] [2021-07-09 18:26:12,990 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 [2021-07-09 18:26:13,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:26:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:26:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:26:13,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435841639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:13,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:13,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:26:13,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564032056] [2021-07-09 18:26:13,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:26:13,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:13,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:26:13,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:26:13,081 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) [2021-07-09 18:26:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:13,105 INFO L93 Difference]: Finished difference Result 1749 states and 3746 transitions. [2021-07-09 18:26:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:26:13,106 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 [2021-07-09 18:26:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:13,109 INFO L225 Difference]: With dead ends: 1749 [2021-07-09 18:26:13,109 INFO L226 Difference]: Without dead ends: 1749 [2021-07-09 18:26:13,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:26:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-07-09 18:26:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-07-09 18:26:13,129 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) [2021-07-09 18:26:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-07-09 18:26:13,131 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-07-09 18:26:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:13,132 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-07-09 18:26:13,132 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) [2021-07-09 18:26:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-07-09 18:26:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:26:13,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:13,134 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] [2021-07-09 18:26:13,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-07-09 18:26:13,350 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:13,351 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-07-09 18:26:13,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:13,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805703639] [2021-07-09 18:26:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:13,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805703639] [2021-07-09 18:26:13,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805703639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:13,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967411801] [2021-07-09 18:26:13,894 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 [2021-07-09 18:26:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:13,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:26:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:14,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:14,405 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 [2021-07-09 18:26:14,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:14,496 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-07-09 18:26:14,511 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. [2021-07-09 18:26:14,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-07-09 18:26:14,890 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-09 18:26:14,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-09 18:26:14,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:14,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:14,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:14,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-07-09 18:26:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:14,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967411801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:14,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:14,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-07-09 18:26:14,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409621993] [2021-07-09 18:26:14,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 18:26:14,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:14,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 18:26:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:26:14,903 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) [2021-07-09 18:26:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:18,047 INFO L93 Difference]: Finished difference Result 2993 states and 6367 transitions. [2021-07-09 18:26:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:26:18,047 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 [2021-07-09 18:26:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:18,051 INFO L225 Difference]: With dead ends: 2993 [2021-07-09 18:26:18,051 INFO L226 Difference]: Without dead ends: 2897 [2021-07-09 18:26:18,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2449.6ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:26:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-07-09 18:26:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-07-09 18:26:18,070 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) [2021-07-09 18:26:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-07-09 18:26:18,081 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-07-09 18:26:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:18,081 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-07-09 18:26:18,081 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) [2021-07-09 18:26:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-07-09 18:26:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:26:18,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:18,084 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] [2021-07-09 18:26:18,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:18,300 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-07-09 18:26:18,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:18,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072726581] [2021-07-09 18:26:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:18,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:18,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072726581] [2021-07-09 18:26:18,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072726581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:18,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840871095] [2021-07-09 18:26:18,751 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 [2021-07-09 18:26:18,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:18,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:26:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:19,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:19,834 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 [2021-07-09 18:26:19,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:19,917 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-07-09 18:26:19,932 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. [2021-07-09 18:26:19,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-07-09 18:26:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:20,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:20,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:20,385 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 [2021-07-09 18:26:20,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:20,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:20,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:20,406 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 [2021-07-09 18:26:20,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:20,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:20,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:20,413 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-07-09 18:26:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:20,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840871095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:20,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:20,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-07-09 18:26:20,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720240732] [2021-07-09 18:26:20,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:26:20,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:20,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:26:20,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:26:20,422 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) [2021-07-09 18:26:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:25,715 INFO L93 Difference]: Finished difference Result 3235 states and 6875 transitions. [2021-07-09 18:26:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:26:25,716 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 [2021-07-09 18:26:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:25,720 INFO L225 Difference]: With dead ends: 3235 [2021-07-09 18:26:25,720 INFO L226 Difference]: Without dead ends: 3122 [2021-07-09 18:26:25,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4103.5ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-07-09 18:26:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-07-09 18:26:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-07-09 18:26:25,748 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) [2021-07-09 18:26:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-07-09 18:26:25,750 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-07-09 18:26:25,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:25,750 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-07-09 18:26:25,750 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) [2021-07-09 18:26:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-07-09 18:26:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:26:25,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:25,752 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] [2021-07-09 18:26:25,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-09 18:26:25,957 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-07-09 18:26:25,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:25,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811195482] [2021-07-09 18:26:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:26,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:26,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811195482] [2021-07-09 18:26:26,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811195482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:26,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510158901] [2021-07-09 18:26:26,455 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 [2021-07-09 18:26:26,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:26:26,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:26,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:26:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:28,713 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:26:28,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:28,838 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 [2021-07-09 18:26:28,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:28,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:28,876 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 [2021-07-09 18:26:28,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:29,064 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-07-09 18:26:29,065 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-07-09 18:26:29,133 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. [2021-07-09 18:26:29,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-07-09 18:26:37,805 WARN L205 SmtUtils]: Spent 6.16 s on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:27:05,384 WARN L205 SmtUtils]: Spent 13.96 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-07-09 18:27:05,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:05,714 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-07-09 18:27:05,714 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 [2021-07-09 18:27:05,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:06,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:06,018 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 [2021-07-09 18:27:06,716 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-07-09 18:27:06,842 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-07-09 18:27:06,985 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-07-09 18:27:07,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 18:27:07,864 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-07-09 18:27:07,865 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-07-09 18:27:07,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:27:07,897 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-07-09 18:27:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:08,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510158901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:08,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:08,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-07-09 18:27:08,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340083435] [2021-07-09 18:27:08,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:27:08,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:27:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2269, Unknown=2, NotChecked=0, Total=2550 [2021-07-09 18:27:08,012 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) [2021-07-09 18:27:26,256 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-07-09 18:27:35,843 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-07-09 18:27:58,406 WARN L205 SmtUtils]: Spent 9.16 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-07-09 18:28:09,468 WARN L205 SmtUtils]: Spent 4.83 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-07-09 18:28:21,498 WARN L205 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-07-09 18:28:28,729 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-07-09 18:28:48,829 WARN L205 SmtUtils]: Spent 14.84 s on a formula simplification. DAG size of input: 122 DAG size of output: 74 [2021-07-09 18:29:06,926 WARN L205 SmtUtils]: Spent 14.59 s on a formula simplification. DAG size of input: 120 DAG size of output: 70 [2021-07-09 18:29:18,566 WARN L205 SmtUtils]: Spent 7.68 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-07-09 18:29:30,567 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-07-09 18:29:35,328 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2021-07-09 18:29:50,264 WARN L205 SmtUtils]: Spent 13.43 s on a formula simplification. DAG size of input: 122 DAG size of output: 72 [2021-07-09 18:30:01,854 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-07-09 18:30:09,171 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-07-09 18:30:16,435 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-07-09 18:30:41,148 WARN L205 SmtUtils]: Spent 14.77 s on a formula simplification. DAG size of input: 119 DAG size of output: 70 [2021-07-09 18:30:50,644 WARN L205 SmtUtils]: Spent 5.52 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-07-09 18:30:58,976 WARN L205 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-07-09 18:31:23,249 WARN L205 SmtUtils]: Spent 14.17 s on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2021-07-09 18:31:31,503 WARN L205 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-07-09 18:31:47,187 WARN L205 SmtUtils]: Spent 4.73 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-07-09 18:32:04,358 WARN L205 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-07-09 18:32:30,633 WARN L205 SmtUtils]: Spent 14.19 s on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-07-09 18:32:40,229 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-07-09 18:33:03,472 WARN L205 SmtUtils]: Spent 12.86 s on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2021-07-09 18:33:28,252 WARN L205 SmtUtils]: Spent 14.49 s on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-07-09 18:33:34,620 WARN L205 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-07-09 18:33:47,829 WARN L205 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 126 DAG size of output: 51 [2021-07-09 18:34:08,417 WARN L205 SmtUtils]: Spent 12.39 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-07-09 18:34:32,548 WARN L205 SmtUtils]: Spent 13.19 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2021-07-09 18:34:44,763 WARN L205 SmtUtils]: Spent 8.60 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-07-09 18:34:53,930 WARN L205 SmtUtils]: Spent 5.95 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-07-09 18:35:35,820 WARN L205 SmtUtils]: Spent 16.04 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2021-07-09 18:36:04,389 WARN L205 SmtUtils]: Spent 13.46 s on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2021-07-09 18:36:16,913 WARN L205 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-07-09 18:36:32,242 WARN L205 SmtUtils]: Spent 10.43 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:36:46,023 WARN L205 SmtUtils]: Spent 6.51 s on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-07-09 18:37:28,926 WARN L205 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2021-07-09 18:37:49,521 WARN L205 SmtUtils]: Spent 11.04 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-07-09 18:38:04,336 WARN L205 SmtUtils]: Spent 6.54 s on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-07-09 18:38:14,371 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-07-09 18:38:38,152 WARN L205 SmtUtils]: Spent 6.88 s on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2021-07-09 18:39:01,585 WARN L205 SmtUtils]: Spent 13.18 s on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-07-09 18:39:29,364 WARN L205 SmtUtils]: Spent 13.42 s on a formula simplification. DAG size of input: 113 DAG size of output: 71 Received shutdown request... [2021-07-09 18:39:59,261 WARN L222 SmtUtils]: Removed 17 from assertion stack [2021-07-09 18:39:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-09 18:39:59,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:59,462 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:39:59,464 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:39:59,465 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:39:59,466 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:39:59 BasicIcfg [2021-07-09 18:39:59,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:39:59,466 INFO L168 Benchmark]: Toolchain (without parser) took 879077.90 ms. Allocated memory was 195.0 MB in the beginning and 338.7 MB in the end (delta: 143.7 MB). Free memory was 175.3 MB in the beginning and 189.4 MB in the end (delta: -14.2 MB). Peak memory consumption was 130.8 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:59,466 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 176.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:39:59,466 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.81 ms. Allocated memory is still 195.0 MB. Free memory was 175.1 MB in the beginning and 173.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:59,466 INFO L168 Benchmark]: Boogie Preprocessor took 13.98 ms. Allocated memory is still 195.0 MB. Free memory was 173.6 MB in the beginning and 172.8 MB in the end (delta: 874.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:59,466 INFO L168 Benchmark]: RCFGBuilder took 228.03 ms. Allocated memory is still 195.0 MB. Free memory was 172.6 MB in the beginning and 159.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:59,466 INFO L168 Benchmark]: TraceAbstraction took 878802.59 ms. Allocated memory was 195.0 MB in the beginning and 338.7 MB in the end (delta: 143.7 MB). Free memory was 159.3 MB in the beginning and 189.4 MB in the end (delta: -30.2 MB). Peak memory consumption was 114.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:59,466 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 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 176.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.81 ms. Allocated memory is still 195.0 MB. Free memory was 175.1 MB in the beginning and 173.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.98 ms. Allocated memory is still 195.0 MB. Free memory was 173.6 MB in the beginning and 172.8 MB in the end (delta: 874.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 228.03 ms. Allocated memory is still 195.0 MB. Free memory was 172.6 MB in the beginning and 159.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 878802.59 ms. Allocated memory was 195.0 MB in the beginning and 338.7 MB in the end (delta: 143.7 MB). Free memory was 159.3 MB in the beginning and 189.4 MB in the end (delta: -30.2 MB). Peak memory consumption was 114.0 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 111 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 118 for 3996ms.. - 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: 878742.0ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 57.0ms, AutomataDifference: 814378.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1083 SDtfs, 5816 SDslu, 10460 SDs, 0 SdLazy, 26630 SolverSat, 3491 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 86357.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1842 GetRequests, 588 SyntacticMatches, 37 SemanticMatches, 1216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40644 ImplicationChecksByTransitivity, 741115.5ms 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: 469.4ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 104.7ms SsaConstructionTime, 412.2ms SatisfiabilityAnalysisTime, 58274.8ms 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