/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/dec-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:22:54,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:22:54,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:22:54,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:22:54,669 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 18:22:54,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:22:54,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:22:54,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:22:54,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:22:54,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:22:54,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:22:54,701 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:22:54,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:22:54,701 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:22:54,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:22:54,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:22:54,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:22:54,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:22:54,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:22:54,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:22:54,702 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:22:54,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:22:54,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:22:54,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:22:54,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:22:54,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:22:54,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:22:54,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:22:54,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:22:54,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:22:54,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:22:54,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:22:54,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:22:54,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:22:54,704 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:22:54,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:22:54,704 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:22:54,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:22:54,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:22:54,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:22:54,959 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:22:54,960 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:22:54,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl [2021-07-09 18:22:54,960 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl' [2021-07-09 18:22:54,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:22:54,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:22:54,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:22:54,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:22:54,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:22:54,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:22:55,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:22:55,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:22:55,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:22:55,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/1) ... [2021-07-09 18:22:55,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:22:55,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:22:55,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:22:55,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:22:55,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (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 18:22:55,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:22:55,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:22:55,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:22:55,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:22:55,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:22:55,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:22:55,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:22:55,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:22:55,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:22:55,084 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 18:22:55,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:22:55,256 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:22:55,258 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:22:55 BoogieIcfgContainer [2021-07-09 18:22:55,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:22:55,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:22:55,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:22:55,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:22:55,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:54" (1/2) ... [2021-07-09 18:22:55,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9dccf9 and model type dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:22:55, skipping insertion in model container [2021-07-09 18:22:55,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:22:55" (2/2) ... [2021-07-09 18:22:55,262 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq-array.wvr.bpl [2021-07-09 18:22:55,266 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:22:55,266 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:22:55,266 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:22:55,266 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:22:55,299 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:22:55,320 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:22:55,334 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:22:55,334 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:22:55,334 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:22:55,334 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:22:55,334 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:22:55,334 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:22:55,334 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:22:55,335 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:22:55,341 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-07-09 18:22:55,352 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 18:22:55,353 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 18:22:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 18:22:55,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:55,358 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:55,359 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-07-09 18:22:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:55,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497642940] [2021-07-09 18:22:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:55,499 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 18:22:55,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:55,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497642940] [2021-07-09 18:22:55,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497642940] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:55,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:55,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:55,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779236930] [2021-07-09 18:22:55,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:22:55,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:55,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:22:55,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:22:55,519 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 18:22:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:55,548 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-07-09 18:22:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:22:55,551 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 18:22:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:55,560 INFO L225 Difference]: With dead ends: 104 [2021-07-09 18:22:55,560 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 18:22:55,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:22:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 18:22:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-07-09 18:22:55,596 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 18:22:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-07-09 18:22:55,599 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-07-09 18:22:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:55,599 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-07-09 18:22:55,599 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 18:22:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-07-09 18:22:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:22:55,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:55,601 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 18:22:55,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:22:55,601 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:55,604 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-07-09 18:22:55,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:55,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18278739] [2021-07-09 18:22:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:55,652 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 18:22:55,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:55,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18278739] [2021-07-09 18:22:55,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18278739] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:55,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:55,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:55,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812631463] [2021-07-09 18:22:55,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:55,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:55,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:55,654 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 18:22:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:55,673 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-07-09 18:22:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:55,673 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 18:22:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:55,674 INFO L225 Difference]: With dead ends: 91 [2021-07-09 18:22:55,674 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 18:22:55,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 18:22:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-07-09 18:22:55,679 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 18:22:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-07-09 18:22:55,680 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-07-09 18:22:55,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:55,680 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-07-09 18:22:55,680 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 18:22:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-07-09 18:22:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:22:55,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:55,681 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 18:22:55,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:22:55,681 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:55,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-07-09 18:22:55,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:55,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138669161] [2021-07-09 18:22:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:55,825 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 18:22:55,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:55,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138669161] [2021-07-09 18:22:55,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138669161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:55,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886306850] [2021-07-09 18:22:55,826 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 18:22:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:22:55,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:56,058 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 18:22:56,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:56,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:56,064 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 18:22:56,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-07-09 18:22:56,089 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 18:22:56,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:56,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:56,095 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 18:22:56,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-07-09 18:22:56,108 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 18:22:56,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886306850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:56,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:56,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:22:56,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120836912] [2021-07-09 18:22:56,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:22:56,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:56,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:22:56,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:56,110 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 18:22:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:56,185 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-07-09 18:22:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:22:56,186 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 18:22:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:56,187 INFO L225 Difference]: With dead ends: 154 [2021-07-09 18:22:56,187 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 18:22:56,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:22:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 18:22:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-07-09 18:22:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-07-09 18:22:56,194 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-07-09 18:22:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:56,194 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-07-09 18:22:56,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:56,194 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-07-09 18:22:56,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:22:56,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:56,195 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:56,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:22:56,409 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:56,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-07-09 18:22:56,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:56,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091504183] [2021-07-09 18:22:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:56,478 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 18:22:56,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:56,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091504183] [2021-07-09 18:22:56,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091504183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:56,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236696618] [2021-07-09 18:22:56,479 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) [2021-07-09 18:22:56,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:56,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:56,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:56,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:56,607 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 18:22:56,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236696618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:56,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:56,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-09 18:22:56,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469487882] [2021-07-09 18:22:56,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:22:56,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:56,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:22:56,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:22:56,609 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 18:22:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:56,681 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-07-09 18:22:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:22:56,682 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 18:22:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:56,683 INFO L225 Difference]: With dead ends: 284 [2021-07-09 18:22:56,683 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 18:22:56,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:22:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 18:22:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-07-09 18:22:56,693 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 18:22:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-07-09 18:22:56,694 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-07-09 18:22:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:56,694 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-07-09 18:22:56,694 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 18:22:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-07-09 18:22:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:22:56,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:56,696 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 18:22:56,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:56,913 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:56,913 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-07-09 18:22:56,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:56,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034279414] [2021-07-09 18:22:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:57,172 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 18:22:57,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:57,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034279414] [2021-07-09 18:22:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034279414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:57,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120605050] [2021-07-09 18:22:57,173 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 18:22:57,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:57,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:57,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:22:57,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:57,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:57,396 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 18:22:57,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:57,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:57,434 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 18:22:57,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-07-09 18:22:57,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:57,607 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 18:22:57,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:22:57,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:57,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:57,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-07-09 18:22:57,764 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 18:22:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120605050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:57,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:57,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-07-09 18:22:57,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379921082] [2021-07-09 18:22:57,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:22:57,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:57,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:22:57,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:22:57,767 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 18:22:59,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:59,588 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-07-09 18:22:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:22:59,589 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 18:22:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:59,591 INFO L225 Difference]: With dead ends: 650 [2021-07-09 18:22:59,591 INFO L226 Difference]: Without dead ends: 573 [2021-07-09 18:22:59,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1361.2ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:22:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-09 18:22:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-07-09 18:22:59,604 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 18:22:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-07-09 18:22:59,605 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-07-09 18:22:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:59,605 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-07-09 18:22:59,605 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 18:22:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-07-09 18:22:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:22:59,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:59,608 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 18:22:59,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:59,825 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-07-09 18:22:59,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:59,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832441908] [2021-07-09 18:22:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:00,032 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 18:23:00,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832441908] [2021-07-09 18:23:00,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832441908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423366372] [2021-07-09 18:23:00,033 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 18:23:00,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:00,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:00,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:23:00,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:00,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:00,315 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 18:23:00,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:00,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:00,334 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 18:23:00,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-09 18:23:00,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:00,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:00,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-07-09 18:23:00,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:00,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:00,406 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 18:23:00,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-09 18:23:00,419 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 18:23:00,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423366372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:00,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:00,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-09 18:23:00,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601063407] [2021-07-09 18:23:00,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:00,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:00,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:00,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:00,421 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 18:23:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:00,943 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-07-09 18:23:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:00,944 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 18:23:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:00,947 INFO L225 Difference]: With dead ends: 1023 [2021-07-09 18:23:00,947 INFO L226 Difference]: Without dead ends: 878 [2021-07-09 18:23:00,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 534.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:23:00,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-09 18:23:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-07-09 18:23:00,958 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 18:23:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-07-09 18:23:00,959 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-07-09 18:23:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:00,960 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-07-09 18:23:00,960 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 18:23:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-07-09 18:23:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:23:00,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:00,961 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 18:23:01,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:01,177 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:01,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:01,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-07-09 18:23:01,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:01,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189975180] [2021-07-09 18:23:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:01,354 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 18:23:01,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:01,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189975180] [2021-07-09 18:23:01,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189975180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:01,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505183347] [2021-07-09 18:23:01,354 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 18:23:01,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:23:01,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:01,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:23:01,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:01,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:01,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:23:01,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:01,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:01,621 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 18:23:01,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-07-09 18:23:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:01,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:01,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-07-09 18:23:01,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:01,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:01,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:01,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-07-09 18:23:01,736 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 18:23:01,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505183347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:01,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:01,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-09 18:23:01,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588474899] [2021-07-09 18:23:01,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:23:01,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:01,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:23:01,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:23:01,738 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 18:23:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:02,462 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-07-09 18:23:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:02,463 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 18:23:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:02,466 INFO L225 Difference]: With dead ends: 1081 [2021-07-09 18:23:02,466 INFO L226 Difference]: Without dead ends: 927 [2021-07-09 18:23:02,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:23:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-09 18:23:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-07-09 18:23:02,476 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 18:23:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-07-09 18:23:02,478 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-07-09 18:23:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:02,478 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-07-09 18:23:02,478 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 18:23:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-07-09 18:23:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:23:02,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:02,479 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 18:23:02,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:23:02,697 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-07-09 18:23:02,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:02,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598654917] [2021-07-09 18:23:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:02,871 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 18:23:02,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:02,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598654917] [2021-07-09 18:23:02,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598654917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:02,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973924545] [2021-07-09 18:23:02,871 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 18:23:02,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:23:02,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:02,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:23:02,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:03,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:03,337 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 18:23:03,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:03,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:03,348 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 18:23:03,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-07-09 18:23:03,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:03,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:03,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:03,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18:23:03,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:03,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:03,421 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 18:23:03,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-07-09 18:23:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:03,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973924545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:03,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:03,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-07-09 18:23:03,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062029052] [2021-07-09 18:23:03,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:03,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:03,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:03,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:03,447 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:03,973 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-07-09 18:23:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:23:03,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:23:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:03,977 INFO L225 Difference]: With dead ends: 1039 [2021-07-09 18:23:03,977 INFO L226 Difference]: Without dead ends: 929 [2021-07-09 18:23:03,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:23:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-09 18:23:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-07-09 18:23:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-07-09 18:23:03,989 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-07-09 18:23:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:03,989 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-07-09 18:23:03,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-07-09 18:23:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:23:03,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:03,990 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 18:23:04,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:04,205 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-07-09 18:23:04,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:04,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187873366] [2021-07-09 18:23:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:04,400 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 18:23:04,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:04,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187873366] [2021-07-09 18:23:04,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187873366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:04,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921594466] [2021-07-09 18:23:04,401 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 18:23:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:04,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:23:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:04,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:04,624 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 18:23:04,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:04,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:04,634 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 18:23:04,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-09 18:23:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:04,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18:23:04,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:04,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:04,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:04,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-09 18:23:04,727 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 18:23:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921594466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:04,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:04,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-09 18:23:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86425094] [2021-07-09 18:23:04,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:23:04,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:04,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:23:04,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:23:04,728 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:05,196 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-07-09 18:23:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:23:05,196 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 18:23:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:05,199 INFO L225 Difference]: With dead ends: 1050 [2021-07-09 18:23:05,199 INFO L226 Difference]: Without dead ends: 952 [2021-07-09 18:23:05,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:23:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-07-09 18:23:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-07-09 18:23:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-07-09 18:23:05,210 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-07-09 18:23:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:05,210 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-07-09 18:23:05,210 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 18:23:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-07-09 18:23:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:23:05,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:05,211 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 18:23:05,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:05,425 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-07-09 18:23:05,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:05,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347221078] [2021-07-09 18:23:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:05,479 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 18:23:05,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:05,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347221078] [2021-07-09 18:23:05,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347221078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:05,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114632711] [2021-07-09 18:23:05,479 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 18:23:05,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:05,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:05,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:23:05,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:05,555 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 18:23:05,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114632711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:05,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:05,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-07-09 18:23:05,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145905595] [2021-07-09 18:23:05,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:23:05,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:23:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:23:05,556 INFO L87 Difference]: Start difference. First operand 467 states and 1007 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:05,611 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-07-09 18:23:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:23:05,611 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 18:23:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:05,614 INFO L225 Difference]: With dead ends: 885 [2021-07-09 18:23:05,614 INFO L226 Difference]: Without dead ends: 847 [2021-07-09 18:23:05,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:23:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-09 18:23:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-07-09 18:23:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-07-09 18:23:05,627 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-07-09 18:23:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:05,627 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-07-09 18:23:05,627 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 18:23:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-07-09 18:23:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:23:05,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:05,628 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 18:23:05,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:23:05,844 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:05,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-07-09 18:23:05,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:05,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732719698] [2021-07-09 18:23:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:06,165 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 18:23:06,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:06,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732719698] [2021-07-09 18:23:06,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732719698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:06,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641909799] [2021-07-09 18:23:06,165 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 18:23:06,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:23:06,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:06,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:23:06,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:06,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:06,484 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 18:23:06,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:06,525 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.3 percent of original size [2021-07-09 18:23:06,527 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 18:23:06,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:32 [2021-07-09 18:23:06,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:06,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:06,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:06,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:06,822 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 18:23:06,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:06,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:06,867 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 18:23:06,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-07-09 18:23:06,933 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 18:23:06,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641909799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:06,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:06,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-07-09 18:23:06,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700122043] [2021-07-09 18:23:06,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:23:06,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:06,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:23:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:23:06,935 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:10,506 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-07-09 18:23:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:23:10,507 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 18:23:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:10,515 INFO L225 Difference]: With dead ends: 2812 [2021-07-09 18:23:10,515 INFO L226 Difference]: Without dead ends: 2548 [2021-07-09 18:23:10,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 2876.8ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-07-09 18:23:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-07-09 18:23:10,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-07-09 18:23:10,544 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 18:23:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-07-09 18:23:10,546 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-07-09 18:23:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:10,546 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-07-09 18:23:10,546 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 18:23:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-07-09 18:23:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:23:10,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:10,547 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 18:23:10,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:10,761 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:10,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-07-09 18:23:10,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:10,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359618840] [2021-07-09 18:23:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:11,082 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 18:23:11,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:11,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359618840] [2021-07-09 18:23:11,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359618840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:11,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958545768] [2021-07-09 18:23:11,082 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 18:23:11,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:11,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:11,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:23:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:11,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:11,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 18:23:11,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:11,754 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-09 18:23:11,765 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 18:23:11,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-09 18:23:12,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:12,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:12,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:12,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:12,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-09 18:23:12,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:12,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:12,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:12,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:12,100 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 18:23:12,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:12,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:12,106 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 18:23:12,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-07-09 18:23:12,113 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 18:23:12,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958545768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:12,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:12,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-09 18:23:12,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565605820] [2021-07-09 18:23:12,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:23:12,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:12,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:23:12,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:23:12,115 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 18:23:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:14,044 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-07-09 18:23:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:23:14,045 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 18:23:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:14,051 INFO L225 Difference]: With dead ends: 2302 [2021-07-09 18:23:14,051 INFO L226 Difference]: Without dead ends: 2145 [2021-07-09 18:23:14,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1675.6ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:23:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-09 18:23:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-07-09 18:23:14,067 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 18:23:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-07-09 18:23:14,068 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-07-09 18:23:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:14,068 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-07-09 18:23:14,068 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 18:23:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-07-09 18:23:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:23:14,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:14,070 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 18:23:14,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:14,285 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-07-09 18:23:14,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:14,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958357363] [2021-07-09 18:23:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:14,625 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 18:23:14,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:14,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958357363] [2021-07-09 18:23:14,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958357363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:14,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701195851] [2021-07-09 18:23:14,625 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 18:23:14,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:23:14,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:23:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:15,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:15,210 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 18:23:15,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,253 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-07-09 18:23:15,262 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 18:23:15,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:57 [2021-07-09 18:23:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:15,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:15,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:15,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:23:15,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:15,469 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 18:23:15,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-07-09 18:23:15,478 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 18:23:15,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701195851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:15,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:15,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-09 18:23:15,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742733736] [2021-07-09 18:23:15,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:23:15,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:23:15,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:23:15,480 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:17,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:17,813 INFO L93 Difference]: Finished difference Result 2586 states and 5448 transitions. [2021-07-09 18:23:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:23:17,814 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 18:23:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:17,820 INFO L225 Difference]: With dead ends: 2586 [2021-07-09 18:23:17,821 INFO L226 Difference]: Without dead ends: 2295 [2021-07-09 18:23:17,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 1910.1ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:23:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-09 18:23:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 746. [2021-07-09 18:23:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.153020134228188) internal successors, (1604), 745 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1604 transitions. [2021-07-09 18:23:17,840 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1604 transitions. Word has length 41 [2021-07-09 18:23:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:17,840 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1604 transitions. [2021-07-09 18:23:17,840 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 18:23:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1604 transitions. [2021-07-09 18:23:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:23:17,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:17,842 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 18:23:18,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:18,057 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-07-09 18:23:18,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:18,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743997533] [2021-07-09 18:23:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:18,359 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 18:23:18,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:18,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743997533] [2021-07-09 18:23:18,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743997533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:18,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975313539] [2021-07-09 18:23:18,359 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 18:23:18,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:23:18,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:23:18,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:19,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:19,122 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 18:23:19,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,162 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-07-09 18:23:19,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:23:19,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-07-09 18:23:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:20,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:20,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:20,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:20,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2021-07-09 18:23:20,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:23:20,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:20,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:20,277 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-07-09 18:23:20,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 1 [2021-07-09 18:23:20,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:20,305 INFO L628 ElimStorePlain]: treesize reduction 21, result has 59.6 percent of original size [2021-07-09 18:23:20,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:20,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-07-09 18:23:20,386 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 18:23:20,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975313539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:20,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:20,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-09 18:23:20,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376976944] [2021-07-09 18:23:20,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:23:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:23:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:23:20,387 INFO L87 Difference]: Start difference. First operand 746 states and 1604 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:23,723 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-09 18:23:24,943 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-09 18:23:25,615 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-09 18:23:25,991 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-09 18:23:26,800 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-09 18:23:27,482 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-09 18:23:30,189 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-09 18:23:32,170 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-07-09 18:23:32,641 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-07-09 18:23:35,748 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-07-09 18:23:37,532 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-09 18:23:37,762 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-07-09 18:23:38,942 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-09 18:23:39,611 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-09 18:23:40,255 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-09 18:23:41,873 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-07-09 18:23:46,147 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-07-09 18:23:46,840 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:23:49,314 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-07-09 18:23:51,297 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-09 18:23:54,566 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-07-09 18:23:59,000 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-09 18:24:00,597 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-07-09 18:24:01,802 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-09 18:24:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:04,275 INFO L93 Difference]: Finished difference Result 3393 states and 7212 transitions. [2021-07-09 18:24:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:24:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:24:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:04,284 INFO L225 Difference]: With dead ends: 3393 [2021-07-09 18:24:04,285 INFO L226 Difference]: Without dead ends: 3071 [2021-07-09 18:24:04,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5845 ImplicationChecksByTransitivity, 27095.0ms TimeCoverageRelationStatistics Valid=2687, Invalid=14343, Unknown=0, NotChecked=0, Total=17030 [2021-07-09 18:24:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-07-09 18:24:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 882. [2021-07-09 18:24:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.155505107832009) internal successors, (1899), 881 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1899 transitions. [2021-07-09 18:24:04,309 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1899 transitions. Word has length 41 [2021-07-09 18:24:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:04,309 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 1899 transitions. [2021-07-09 18:24:04,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1899 transitions. [2021-07-09 18:24:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:24:04,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:04,311 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 18:24:04,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:04,525 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-07-09 18:24:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:04,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272605090] [2021-07-09 18:24:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:04,833 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 18:24:04,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:04,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272605090] [2021-07-09 18:24:04,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272605090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:04,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316451074] [2021-07-09 18:24:04,833 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 18:24:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:04,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:24:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:05,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:05,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 18:24:05,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:05,541 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-07-09 18:24:05,559 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 18:24:05,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-07-09 18:24:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:05,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:05,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:05,639 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 18:24:05,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:05,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:05,647 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 18:24:05,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-09 18:24:05,655 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 18:24:05,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316451074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:05,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:05,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-09 18:24:05,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117149554] [2021-07-09 18:24:05,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:24:05,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:24:05,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:24:05,657 INFO L87 Difference]: Start difference. First operand 882 states and 1899 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:07,953 INFO L93 Difference]: Finished difference Result 3308 states and 7100 transitions. [2021-07-09 18:24:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:24:07,954 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 18:24:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:07,970 INFO L225 Difference]: With dead ends: 3308 [2021-07-09 18:24:07,971 INFO L226 Difference]: Without dead ends: 3100 [2021-07-09 18:24:07,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1530.0ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:24:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-07-09 18:24:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1074. [2021-07-09 18:24:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.1491146318732524) internal successors, (2306), 1073 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2306 transitions. [2021-07-09 18:24:07,996 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2306 transitions. Word has length 41 [2021-07-09 18:24:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:07,997 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2306 transitions. [2021-07-09 18:24:07,997 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 18:24:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2306 transitions. [2021-07-09 18:24:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:24:08,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:08,000 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 18:24:08,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-07-09 18:24:08,217 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-07-09 18:24:08,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:08,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981931310] [2021-07-09 18:24:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:08,556 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 18:24:08,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:08,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981931310] [2021-07-09 18:24:08,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981931310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:08,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765897693] [2021-07-09 18:24:08,556 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 18:24:08,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:08,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:08,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:24:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:09,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:09,143 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 18:24:09,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:09,183 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-09 18:24:09,194 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 18:24:09,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-09 18:24:09,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:09,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:09,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:09,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:09,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:09,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:09,343 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 18:24:09,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:09,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:09,351 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 18:24:09,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-09 18:24:09,359 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 18:24:09,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765897693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:09,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:09,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-09 18:24:09,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881145697] [2021-07-09 18:24:09,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:24:09,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:09,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:24:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:24:09,360 INFO L87 Difference]: Start difference. First operand 1074 states and 2306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:11,955 INFO L93 Difference]: Finished difference Result 3729 states and 7998 transitions. [2021-07-09 18:24:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:24:11,955 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 18:24:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:11,966 INFO L225 Difference]: With dead ends: 3729 [2021-07-09 18:24:11,966 INFO L226 Difference]: Without dead ends: 3485 [2021-07-09 18:24:11,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1837.7ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:24:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-07-09 18:24:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1340. [2021-07-09 18:24:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.1598207617625094) internal successors, (2892), 1339 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2892 transitions. [2021-07-09 18:24:11,994 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2892 transitions. Word has length 41 [2021-07-09 18:24:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:11,994 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 2892 transitions. [2021-07-09 18:24:11,994 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 18:24:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2892 transitions. [2021-07-09 18:24:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:24:11,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:11,996 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 18:24:12,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:12,214 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:12,214 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-07-09 18:24:12,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:12,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507418119] [2021-07-09 18:24:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:12,564 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 18:24:12,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:12,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507418119] [2021-07-09 18:24:12,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507418119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:12,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863051559] [2021-07-09 18:24:12,565 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 18:24:12,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:24:12,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:12,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:24:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:13,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:13,028 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 18:24:13,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:13,071 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.4 percent of original size [2021-07-09 18:24:13,082 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 18:24:13,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:57 [2021-07-09 18:24:13,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:13,509 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 18:24:13,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:24:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:13,583 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-07-09 18:24:13,583 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 18:24:13,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:13,649 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-07-09 18:24:13,662 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 18:24:13,662 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-07-09 18:24:13,763 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 18:24:13,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863051559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:13,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:13,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-07-09 18:24:13,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943294583] [2021-07-09 18:24:13,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:24:13,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:13,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:24:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:24:13,764 INFO L87 Difference]: Start difference. First operand 1340 states and 2892 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:17,215 INFO L93 Difference]: Finished difference Result 3544 states and 7640 transitions. [2021-07-09 18:24:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:24:17,215 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 18:24:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:17,223 INFO L225 Difference]: With dead ends: 3544 [2021-07-09 18:24:17,223 INFO L226 Difference]: Without dead ends: 3383 [2021-07-09 18:24:17,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2822.5ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:24:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-07-09 18:24:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1483. [2021-07-09 18:24:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.163292847503374) internal successors, (3206), 1482 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3206 transitions. [2021-07-09 18:24:17,248 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3206 transitions. Word has length 41 [2021-07-09 18:24:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:17,248 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3206 transitions. [2021-07-09 18:24:17,248 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 18:24:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3206 transitions. [2021-07-09 18:24:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:24:17,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:17,250 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 18:24:17,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-09 18:24:17,467 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:17,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-07-09 18:24:17,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:17,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702915201] [2021-07-09 18:24:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:17,518 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 18:24:17,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:17,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702915201] [2021-07-09 18:24:17,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702915201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:17,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270599137] [2021-07-09 18:24:17,519 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 18:24:17,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:17,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:24:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:17,608 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 18:24:17,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270599137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:17,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:17,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-07-09 18:24:17,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324495885] [2021-07-09 18:24:17,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:24:17,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:17,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:24:17,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:24:17,609 INFO L87 Difference]: Start difference. First operand 1483 states and 3206 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:17,693 INFO L93 Difference]: Finished difference Result 2019 states and 4365 transitions. [2021-07-09 18:24:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:24:17,693 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 18:24:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:17,696 INFO L225 Difference]: With dead ends: 2019 [2021-07-09 18:24:17,696 INFO L226 Difference]: Without dead ends: 1969 [2021-07-09 18:24:17,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:24:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-07-09 18:24:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1621. [2021-07-09 18:24:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.175925925925926) internal successors, (3525), 1620 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3525 transitions. [2021-07-09 18:24:17,716 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3525 transitions. Word has length 45 [2021-07-09 18:24:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:17,716 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3525 transitions. [2021-07-09 18:24:17,716 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 18:24:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3525 transitions. [2021-07-09 18:24:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 18:24:17,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:17,718 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 18:24:17,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:17,937 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-07-09 18:24:17,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:17,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825404331] [2021-07-09 18:24:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:17,958 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 18:24:17,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825404331] [2021-07-09 18:24:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825404331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18967095] [2021-07-09 18:24:17,958 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 18:24:17,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:24:17,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:17,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:24:17,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:24:18,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18967095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:18,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:18,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:24:18,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814686312] [2021-07-09 18:24:18,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:24:18,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:18,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:24:18,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:24:18,052 INFO L87 Difference]: Start difference. First operand 1621 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:18,074 INFO L93 Difference]: Finished difference Result 2104 states and 4548 transitions. [2021-07-09 18:24:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:24:18,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-09 18:24:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:18,078 INFO L225 Difference]: With dead ends: 2104 [2021-07-09 18:24:18,078 INFO L226 Difference]: Without dead ends: 2104 [2021-07-09 18:24:18,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:24:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-07-09 18:24:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1445. [2021-07-09 18:24:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.1717451523545708) internal successors, (3136), 1444 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3136 transitions. [2021-07-09 18:24:18,096 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3136 transitions. Word has length 46 [2021-07-09 18:24:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:18,096 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 3136 transitions. [2021-07-09 18:24:18,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3136 transitions. [2021-07-09 18:24:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 18:24:18,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:18,098 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 18:24:18,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:18,306 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:18,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:18,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-07-09 18:24:18,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:18,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652544480] [2021-07-09 18:24:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:18,341 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 18:24:18,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:18,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652544480] [2021-07-09 18:24:18,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652544480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:18,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655109520] [2021-07-09 18:24:18,341 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 18:24:18,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:24:18,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:18,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:24:18,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:18,423 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 18:24:18,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655109520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:18,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:18,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:24:18,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049946142] [2021-07-09 18:24:18,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:24:18,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:24:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:24:18,424 INFO L87 Difference]: Start difference. First operand 1445 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:18,463 INFO L93 Difference]: Finished difference Result 1604 states and 3442 transitions. [2021-07-09 18:24:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:24:18,465 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 18:24:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:18,467 INFO L225 Difference]: With dead ends: 1604 [2021-07-09 18:24:18,467 INFO L226 Difference]: Without dead ends: 1604 [2021-07-09 18:24:18,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:24:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-07-09 18:24:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1207. [2021-07-09 18:24:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.1550580431177444) internal successors, (2599), 1206 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2599 transitions. [2021-07-09 18:24:18,509 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2599 transitions. Word has length 46 [2021-07-09 18:24:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:18,509 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2599 transitions. [2021-07-09 18:24:18,509 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 18:24:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2599 transitions. [2021-07-09 18:24:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:24:18,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:18,510 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 18:24:18,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-09 18:24:18,725 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-07-09 18:24:18,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:18,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363905040] [2021-07-09 18:24:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:19,286 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 18:24:19,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:19,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363905040] [2021-07-09 18:24:19,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363905040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:19,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652395535] [2021-07-09 18:24:19,287 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 18:24:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:19,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:24:19,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:19,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:19,857 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 18:24:19,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:19,929 INFO L628 ElimStorePlain]: treesize reduction 86, result has 58.7 percent of original size [2021-07-09 18:24:19,940 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 18:24:19,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:48 [2021-07-09 18:24:20,337 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-09 18:24:20,337 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 18:24:20,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:20,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:20,341 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 18:24:20,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-07-09 18:24:20,349 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 18:24:20,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652395535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:20,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:20,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-07-09 18:24:20,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492834572] [2021-07-09 18:24:20,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 18:24:20,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 18:24:20,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:24:20,350 INFO L87 Difference]: Start difference. First operand 1207 states and 2599 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:23,392 INFO L93 Difference]: Finished difference Result 2755 states and 5872 transitions. [2021-07-09 18:24:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:24:23,393 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 18:24:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:23,397 INFO L225 Difference]: With dead ends: 2755 [2021-07-09 18:24:23,397 INFO L226 Difference]: Without dead ends: 2659 [2021-07-09 18:24:23,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2630.0ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:24:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-07-09 18:24:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1299. [2021-07-09 18:24:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.1656394453004624) internal successors, (2811), 1298 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2811 transitions. [2021-07-09 18:24:23,417 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2811 transitions. Word has length 50 [2021-07-09 18:24:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:23,417 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 2811 transitions. [2021-07-09 18:24:23,417 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 18:24:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2811 transitions. [2021-07-09 18:24:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:24:23,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:23,419 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 18:24:23,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:23,633 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-07-09 18:24:23,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:23,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684149379] [2021-07-09 18:24:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:24,151 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 18:24:24,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684149379] [2021-07-09 18:24:24,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684149379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793520346] [2021-07-09 18:24:24,152 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 18:24:24,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:24,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:24:24,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:25,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:25,292 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 18:24:25,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:25,376 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-07-09 18:24:25,403 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 18:24:25,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-07-09 18:24:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:25,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:25,892 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 18:24:25,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:25,902 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 18:24:25,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:25,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:25,909 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 18:24:25,909 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-07-09 18:24:25,917 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 18:24:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793520346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-07-09 18:24:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525071192] [2021-07-09 18:24:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:24:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:25,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:24:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:24:25,918 INFO L87 Difference]: Start difference. First operand 1299 states and 2811 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:31,073 INFO L93 Difference]: Finished difference Result 3297 states and 7007 transitions. [2021-07-09 18:24:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:24:31,073 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 18:24:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:31,078 INFO L225 Difference]: With dead ends: 3297 [2021-07-09 18:24:31,078 INFO L226 Difference]: Without dead ends: 3184 [2021-07-09 18:24:31,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4346.8ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-07-09 18:24:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-07-09 18:24:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1653. [2021-07-09 18:24:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.151331719128329) internal successors, (3554), 1652 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3554 transitions. [2021-07-09 18:24:31,117 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3554 transitions. Word has length 50 [2021-07-09 18:24:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:31,118 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3554 transitions. [2021-07-09 18:24:31,118 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 18:24:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3554 transitions. [2021-07-09 18:24:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:24:31,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:31,123 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 18:24:31,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-07-09 18:24:31,339 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:31,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-07-09 18:24:31,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:31,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744995250] [2021-07-09 18:24:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:31,823 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 18:24:31,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:31,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744995250] [2021-07-09 18:24:31,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744995250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:31,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372413571] [2021-07-09 18:24:31,824 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 18:24:31,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:24:31,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:24:31,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:34,385 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:24:34,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 18:24:34,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:34,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:34,551 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 18:24:34,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:34,762 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-07-09 18:24:34,763 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-07-09 18:24:34,846 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 18:24:34,846 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-07-09 18:24:43,874 WARN L205 SmtUtils]: Spent 4.88 s on a formula simplification that was a NOOP. DAG size: 66 [2021-07-09 18:25:02,694 WARN L205 SmtUtils]: Spent 16.51 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-09 18:25:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:02,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:02,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:03,019 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-07-09 18:25:03,019 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 18:25:03,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:03,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:03,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:03,512 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 18:25:04,781 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-07-09 18:25:04,924 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-07-09 18:25:05,091 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 269 [2021-07-09 18:25:06,290 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-07-09 18:25:06,978 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 61 [2021-07-09 18:25:06,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:07,250 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 73 [2021-07-09 18:25:07,251 INFO L628 ElimStorePlain]: treesize reduction 474, result has 24.8 percent of original size [2021-07-09 18:25:07,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:25:07,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-07-09 18:25:07,417 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 18:25:07,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372413571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:07,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:07,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-07-09 18:25:07,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972077149] [2021-07-09 18:25:07,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:25:07,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:07,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:25:07,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2270, Unknown=1, NotChecked=0, Total=2550 [2021-07-09 18:25:07,418 INFO L87 Difference]: Start difference. First operand 1653 states and 3554 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:19,939 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-09 18:25:27,312 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-07-09 18:25:29,663 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-09 18:25:38,696 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2021-07-09 18:25:42,121 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 18:25:57,237 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-07-09 18:26:01,063 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 18:26:06,784 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:26:17,607 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-07-09 18:26:25,301 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 134 DAG size of output: 44 [2021-07-09 18:26:35,947 WARN L205 SmtUtils]: Spent 5.52 s on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2021-07-09 18:26:42,602 WARN L205 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 124 DAG size of output: 46 [2021-07-09 18:26:46,824 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-07-09 18:26:59,667 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2021-07-09 18:27:04,745 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2021-07-09 18:27:12,422 WARN L205 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2021-07-09 18:27:22,304 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-07-09 18:27:29,148 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-07-09 18:27:33,679 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-07-09 18:27:43,346 WARN L205 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2021-07-09 18:27:52,819 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-07-09 18:27:56,963 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-07-09 18:28:17,470 WARN L205 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2021-07-09 18:28:26,140 WARN L205 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 131 DAG size of output: 51 [2021-07-09 18:28:40,069 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2021-07-09 18:28:52,924 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-07-09 18:29:10,709 WARN L205 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2021-07-09 18:29:20,552 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2021-07-09 18:29:49,398 WARN L205 SmtUtils]: Spent 8.33 s on a formula simplification. DAG size of input: 129 DAG size of output: 60 [2021-07-09 18:30:07,706 WARN L205 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2021-07-09 18:30:13,658 WARN L205 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2021-07-09 18:30:28,276 WARN L205 SmtUtils]: Spent 5.81 s on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-07-09 18:30:43,752 WARN L205 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2021-07-09 18:30:48,439 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 53 [2021-07-09 18:31:10,105 WARN L205 SmtUtils]: Spent 9.54 s on a formula simplification. DAG size of input: 134 DAG size of output: 62 [2021-07-09 18:31:21,641 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-07-09 18:31:28,190 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2021-07-09 18:31:46,129 WARN L205 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-07-09 18:32:15,371 WARN L205 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2021-07-09 18:32:43,051 WARN L205 SmtUtils]: Spent 12.18 s on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2021-07-09 18:32:50,464 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 55 [2021-07-09 18:33:00,149 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-07-09 18:33:09,832 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-09 18:33:18,788 WARN L205 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-07-09 18:34:05,421 WARN L205 SmtUtils]: Spent 5.75 s on a formula simplification. DAG size of input: 145 DAG size of output: 52 [2021-07-09 18:34:19,848 WARN L205 SmtUtils]: Spent 6.77 s on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-07-09 18:34:38,310 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-07-09 18:34:43,003 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-07-09 18:35:00,126 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 120 DAG size of output: 63 [2021-07-09 18:35:21,210 WARN L205 SmtUtils]: Spent 10.34 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-07-09 18:35:50,753 WARN L205 SmtUtils]: Spent 13.23 s on a formula simplification. DAG size of input: 117 DAG size of output: 75 [2021-07-09 18:36:20,216 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2021-07-09 18:36:30,158 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 69 [2021-07-09 18:36:43,144 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-07-09 18:36:52,421 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-07-09 18:37:23,954 WARN L205 SmtUtils]: Spent 9.46 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 Received shutdown request... [2021-07-09 18:37:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-09 18:37:34,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-09 18:37:34,245 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:37:34,247 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:37:34,248 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:37:34,248 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:37:34 BasicIcfg [2021-07-09 18:37:34,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:37:34,248 INFO L168 Benchmark]: Toolchain (without parser) took 879264.70 ms. Allocated memory was 182.5 MB in the beginning and 461.4 MB in the end (delta: 278.9 MB). Free memory was 161.2 MB in the beginning and 398.9 MB in the end (delta: -237.6 MB). Peak memory consumption was 42.4 MB. Max. memory is 8.0 GB. [2021-07-09 18:37:34,249 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 182.5 MB. Free memory is still 162.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:37:34,249 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.62 ms. Allocated memory is still 182.5 MB. Free memory was 161.1 MB in the beginning and 159.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:37:34,249 INFO L168 Benchmark]: Boogie Preprocessor took 14.57 ms. Allocated memory is still 182.5 MB. Free memory was 159.7 MB in the beginning and 158.8 MB in the end (delta: 918.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:37:34,249 INFO L168 Benchmark]: RCFGBuilder took 231.63 ms. Allocated memory is still 182.5 MB. Free memory was 158.7 MB in the beginning and 145.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:37:34,249 INFO L168 Benchmark]: TraceAbstraction took 878989.38 ms. Allocated memory was 182.5 MB in the beginning and 461.4 MB in the end (delta: 278.9 MB). Free memory was 145.1 MB in the beginning and 398.9 MB in the end (delta: -253.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:37:34,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 182.5 MB. Free memory is still 162.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.62 ms. Allocated memory is still 182.5 MB. Free memory was 161.1 MB in the beginning and 159.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.57 ms. Allocated memory is still 182.5 MB. Free memory was 159.7 MB in the beginning and 158.8 MB in the end (delta: 918.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 231.63 ms. Allocated memory is still 182.5 MB. Free memory was 158.7 MB in the beginning and 145.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 878989.38 ms. Allocated memory was 182.5 MB in the beginning and 461.4 MB in the end (delta: 278.9 MB). Free memory was 145.1 MB in the beginning and 398.9 MB in the end (delta: -253.8 MB). Peak memory consumption was 26.7 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 (1653states) and FLOYD_HOARE automaton (currently 122 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 160 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 878912.8ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 41.1ms, AutomataDifference: 819502.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1118 SDtfs, 5743 SDslu, 11361 SDs, 0 SdLazy, 26902 SolverSat, 3259 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 136605.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1809 GetRequests, 590 SyntacticMatches, 43 SemanticMatches, 1175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36612 ImplicationChecksByTransitivity, 706505.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1653occurred in iteration=22, InterpolantAutomatonStates: 750, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 418.5ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19446 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 100.8ms SsaConstructionTime, 386.5ms SatisfiabilityAnalysisTime, 53297.0ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 296 QuantifiedInterpolants, 27566 SizeOfPredicates, 225 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 538 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 268/1315 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown