/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:13:59,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:13:59,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:13:59,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:13:59,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-11 00:13:59,493 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:13:59,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:13:59,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:13:59,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:13:59,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:13:59,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:13:59,494 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:13:59,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:13:59,494 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:13:59,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:13:59,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:13:59,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:13:59,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:13:59,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:13:59,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:13:59,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:13:59,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:13:59,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:13:59,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:13:59,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:13:59,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:13:59,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:13:59,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:13:59,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:13:59,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:13:59,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:13:59,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:13:59,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:13:59,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:13:59,497 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:13:59,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:13:59,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:13:59,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:13:59,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:13:59,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:13:59,806 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:13:59,808 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:13:59,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-03-11 00:13:59,809 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-03-11 00:14:00,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:14:00,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:14:00,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:14:00,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:14:00,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:14:00,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:14:00,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:14:00,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:14:00,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:14:00,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... [2021-03-11 00:14:00,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:14:00,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:14:00,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:14:00,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:14:00,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:14:00,195 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:14:00,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:14:00,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:14:00,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:14:00,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:14:00,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:14:00,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:14:00,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:14:00,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:14:00,198 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:14:00,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:14:00,394 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:14:00,408 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:14:00 BoogieIcfgContainer [2021-03-11 00:14:00,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:14:00,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:14:00,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:14:00,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:14:00,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:00" (1/2) ... [2021-03-11 00:14:00,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4681f5f7 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:14:00, skipping insertion in model container [2021-03-11 00:14:00,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:14:00" (2/2) ... [2021-03-11 00:14:00,414 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-03-11 00:14:00,419 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:14:00,419 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:14:00,422 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:14:00,423 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:14:00,473 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 00:14:00,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 00:14:00,514 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:14:00,514 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:14:00,514 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:14:00,514 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:14:00,515 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:14:00,515 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:14:00,515 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:14:00,515 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:14:00,522 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-03-11 00:14:00,530 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) [2021-03-11 00:14:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) [2021-03-11 00:14:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:14:00,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:00,538 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:00,538 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1715863245, now seen corresponding path program 1 times [2021-03-11 00:14:00,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:00,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414818711] [2021-03-11 00:14:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:00,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414818711] [2021-03-11 00:14:00,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:14:00,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:14:00,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436714425] [2021-03-11 00:14:00,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:14:00,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:00,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:14:00,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:14:00,680 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:00,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:00,713 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-03-11 00:14:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:14:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-03-11 00:14:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:00,721 INFO L225 Difference]: With dead ends: 43 [2021-03-11 00:14:00,722 INFO L226 Difference]: Without dead ends: 43 [2021-03-11 00:14:00,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:14:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-03-11 00:14:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-03-11 00:14:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-03-11 00:14:00,748 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-03-11 00:14:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:00,748 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-03-11 00:14:00,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-03-11 00:14:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:14:00,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:00,749 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:00,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:14:00,749 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash -599854287, now seen corresponding path program 1 times [2021-03-11 00:14:00,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:00,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876425908] [2021-03-11 00:14:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:14:00,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876425908] [2021-03-11 00:14:00,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:14:00,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:14:00,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769061718] [2021-03-11 00:14:00,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:14:00,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:00,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:14:00,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:14:00,805 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:00,840 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-03-11 00:14:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:14:00,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-03-11 00:14:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:00,843 INFO L225 Difference]: With dead ends: 50 [2021-03-11 00:14:00,843 INFO L226 Difference]: Without dead ends: 50 [2021-03-11 00:14:00,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:14:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-03-11 00:14:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-03-11 00:14:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-03-11 00:14:00,849 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-03-11 00:14:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:00,850 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-03-11 00:14:00,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-03-11 00:14:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:14:00,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:00,851 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:00,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:14:00,851 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1329802641, now seen corresponding path program 1 times [2021-03-11 00:14:00,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:00,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490206241] [2021-03-11 00:14:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:01,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490206241] [2021-03-11 00:14:01,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061222598] [2021-03-11 00:14:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:14:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:01,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:01,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:14:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556231398] [2021-03-11 00:14:01,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:14:01,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:01,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:14:01,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:14:01,319 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:01,465 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-03-11 00:14:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:14:01,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-11 00:14:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:01,472 INFO L225 Difference]: With dead ends: 144 [2021-03-11 00:14:01,474 INFO L226 Difference]: Without dead ends: 113 [2021-03-11 00:14:01,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:14:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-11 00:14:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2021-03-11 00:14:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-03-11 00:14:01,491 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-03-11 00:14:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:01,491 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-03-11 00:14:01,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-03-11 00:14:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:14:01,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:01,492 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:01,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-11 00:14:01,707 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:01,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1564465709, now seen corresponding path program 2 times [2021-03-11 00:14:01,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:01,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130568089] [2021-03-11 00:14:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:01,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130568089] [2021-03-11 00:14:01,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51401944] [2021-03-11 00:14:01,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:01,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:01,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:02,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:02,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-11 00:14:02,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062870411] [2021-03-11 00:14:02,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:14:02,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:02,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:14:02,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:14:02,019 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:02,323 INFO L93 Difference]: Finished difference Result 167 states and 307 transitions. [2021-03-11 00:14:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:14:02,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:14:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:02,325 INFO L225 Difference]: With dead ends: 167 [2021-03-11 00:14:02,325 INFO L226 Difference]: Without dead ends: 167 [2021-03-11 00:14:02,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:14:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-11 00:14:02,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2021-03-11 00:14:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-03-11 00:14:02,345 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2021-03-11 00:14:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:02,345 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-03-11 00:14:02,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-03-11 00:14:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:14:02,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:02,347 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:02,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:02,566 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1814278047, now seen corresponding path program 3 times [2021-03-11 00:14:02,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:02,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475948425] [2021-03-11 00:14:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:02,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475948425] [2021-03-11 00:14:02,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861847120] [2021-03-11 00:14:02,663 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 [2021-03-11 00:14:02,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:14:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:02,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:02,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:02,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:02,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-11 00:14:02,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401124268] [2021-03-11 00:14:02,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:14:02,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:02,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:14:02,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:14:02,806 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:03,025 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2021-03-11 00:14:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:14:03,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:14:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:03,027 INFO L225 Difference]: With dead ends: 141 [2021-03-11 00:14:03,027 INFO L226 Difference]: Without dead ends: 139 [2021-03-11 00:14:03,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-11 00:14:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2021-03-11 00:14:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-03-11 00:14:03,042 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2021-03-11 00:14:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:03,042 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-03-11 00:14:03,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-03-11 00:14:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:14:03,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:03,046 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:03,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-11 00:14:03,262 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash -709724757, now seen corresponding path program 4 times [2021-03-11 00:14:03,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:03,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781813736] [2021-03-11 00:14:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:03,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781813736] [2021-03-11 00:14:03,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119317246] [2021-03-11 00:14:03,429 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 [2021-03-11 00:14:03,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:03,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:03,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:14:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:03,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:03,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-03-11 00:14:03,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305293697] [2021-03-11 00:14:03,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:03,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:03,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:03,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:03,801 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:04,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:04,333 INFO L93 Difference]: Finished difference Result 350 states and 689 transitions. [2021-03-11 00:14:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:14:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:14:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:04,335 INFO L225 Difference]: With dead ends: 350 [2021-03-11 00:14:04,335 INFO L226 Difference]: Without dead ends: 293 [2021-03-11 00:14:04,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:14:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-03-11 00:14:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 93. [2021-03-11 00:14:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 185 transitions. [2021-03-11 00:14:04,340 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 185 transitions. Word has length 23 [2021-03-11 00:14:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:04,340 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 185 transitions. [2021-03-11 00:14:04,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 185 transitions. [2021-03-11 00:14:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:14:04,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:04,341 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:04,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:04,557 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:04,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:04,558 INFO L82 PathProgramCache]: Analyzing trace with hash -923989763, now seen corresponding path program 5 times [2021-03-11 00:14:04,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:04,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980300682] [2021-03-11 00:14:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:04,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980300682] [2021-03-11 00:14:04,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924693831] [2021-03-11 00:14:04,711 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 [2021-03-11 00:14:04,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:14:04,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:04,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:14:04,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:04,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:04,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-03-11 00:14:04,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867748773] [2021-03-11 00:14:04,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:14:04,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:14:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:14:04,922 INFO L87 Difference]: Start difference. First operand 93 states and 185 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:05,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:05,968 INFO L93 Difference]: Finished difference Result 443 states and 871 transitions. [2021-03-11 00:14:05,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:14:05,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:14:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:05,972 INFO L225 Difference]: With dead ends: 443 [2021-03-11 00:14:05,972 INFO L226 Difference]: Without dead ends: 383 [2021-03-11 00:14:05,973 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 859.1ms TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:14:05,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-03-11 00:14:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 147. [2021-03-11 00:14:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-03-11 00:14:05,982 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 23 [2021-03-11 00:14:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:05,982 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-03-11 00:14:05,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-03-11 00:14:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:14:05,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:05,983 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:06,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-11 00:14:06,193 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2104811523, now seen corresponding path program 6 times [2021-03-11 00:14:06,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:06,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621440567] [2021-03-11 00:14:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:06,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621440567] [2021-03-11 00:14:06,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303633996] [2021-03-11 00:14:06,285 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 [2021-03-11 00:14:06,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:14:06,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:06,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:14:06,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:06,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:06,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-11 00:14:06,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397749372] [2021-03-11 00:14:06,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:14:06,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:06,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:14:06,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:14:06,540 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:07,054 INFO L93 Difference]: Finished difference Result 373 states and 730 transitions. [2021-03-11 00:14:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:14:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:14:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:07,056 INFO L225 Difference]: With dead ends: 373 [2021-03-11 00:14:07,056 INFO L226 Difference]: Without dead ends: 337 [2021-03-11 00:14:07,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:14:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-03-11 00:14:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 178. [2021-03-11 00:14:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.0847457627118646) internal successors, (369), 177 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 369 transitions. [2021-03-11 00:14:07,065 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 369 transitions. Word has length 23 [2021-03-11 00:14:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:07,065 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 369 transitions. [2021-03-11 00:14:07,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 369 transitions. [2021-03-11 00:14:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:14:07,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:07,066 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:07,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:07,271 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 485982727, now seen corresponding path program 7 times [2021-03-11 00:14:07,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:07,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409109872] [2021-03-11 00:14:07,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:07,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409109872] [2021-03-11 00:14:07,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65097616] [2021-03-11 00:14:07,394 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 [2021-03-11 00:14:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:07,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:14:07,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:07,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:07,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-03-11 00:14:07,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719040672] [2021-03-11 00:14:07,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:07,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:07,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:07,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:07,677 INFO L87 Difference]: Start difference. First operand 178 states and 369 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:08,765 INFO L93 Difference]: Finished difference Result 458 states and 915 transitions. [2021-03-11 00:14:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:14:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:14:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:08,767 INFO L225 Difference]: With dead ends: 458 [2021-03-11 00:14:08,768 INFO L226 Difference]: Without dead ends: 425 [2021-03-11 00:14:08,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1008.2ms TimeCoverageRelationStatistics Valid=451, Invalid=1711, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:14:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-03-11 00:14:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-03-11 00:14:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.080808080808081) internal successors, (412), 198 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 412 transitions. [2021-03-11 00:14:08,775 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 412 transitions. Word has length 23 [2021-03-11 00:14:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:08,775 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 412 transitions. [2021-03-11 00:14:08,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 412 transitions. [2021-03-11 00:14:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:14:08,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:08,776 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:08,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:08,995 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2121146795, now seen corresponding path program 8 times [2021-03-11 00:14:08,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:08,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969582902] [2021-03-11 00:14:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:09,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969582902] [2021-03-11 00:14:09,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538754312] [2021-03-11 00:14:09,063 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 [2021-03-11 00:14:09,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:09,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:09,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:14:09,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:09,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:09,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-11 00:14:09,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123633876] [2021-03-11 00:14:09,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:14:09,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:14:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:14:09,243 INFO L87 Difference]: Start difference. First operand 199 states and 412 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:09,556 INFO L93 Difference]: Finished difference Result 432 states and 883 transitions. [2021-03-11 00:14:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:14:09,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2021-03-11 00:14:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:09,558 INFO L225 Difference]: With dead ends: 432 [2021-03-11 00:14:09,559 INFO L226 Difference]: Without dead ends: 428 [2021-03-11 00:14:09,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:14:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-03-11 00:14:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 269. [2021-03-11 00:14:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1305970149253732) internal successors, (571), 268 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 571 transitions. [2021-03-11 00:14:09,566 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 571 transitions. Word has length 23 [2021-03-11 00:14:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:09,566 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 571 transitions. [2021-03-11 00:14:09,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 571 transitions. [2021-03-11 00:14:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:14:09,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:09,567 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:09,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-11 00:14:09,782 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash -170955159, now seen corresponding path program 9 times [2021-03-11 00:14:09,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:09,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951135160] [2021-03-11 00:14:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:09,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951135160] [2021-03-11 00:14:09,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796342955] [2021-03-11 00:14:09,847 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 [2021-03-11 00:14:09,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:14:09,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:09,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:14:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:10,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:10,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-11 00:14:10,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523754012] [2021-03-11 00:14:10,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:14:10,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:14:10,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:14:10,015 INFO L87 Difference]: Start difference. First operand 269 states and 571 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:10,446 INFO L93 Difference]: Finished difference Result 512 states and 1025 transitions. [2021-03-11 00:14:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:14:10,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 25 [2021-03-11 00:14:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:10,448 INFO L225 Difference]: With dead ends: 512 [2021-03-11 00:14:10,448 INFO L226 Difference]: Without dead ends: 512 [2021-03-11 00:14:10,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:14:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-03-11 00:14:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 283. [2021-03-11 00:14:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1347517730496453) internal successors, (602), 282 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 602 transitions. [2021-03-11 00:14:10,456 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 602 transitions. Word has length 25 [2021-03-11 00:14:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:10,457 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 602 transitions. [2021-03-11 00:14:10,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 602 transitions. [2021-03-11 00:14:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:14:10,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:10,458 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:10,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:10,671 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash 465222687, now seen corresponding path program 10 times [2021-03-11 00:14:10,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:10,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866061092] [2021-03-11 00:14:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866061092] [2021-03-11 00:14:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918157075] [2021-03-11 00:14:10,719 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 [2021-03-11 00:14:10,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:10,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:14:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:10,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:10,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-03-11 00:14:10,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895313279] [2021-03-11 00:14:10,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:14:10,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:14:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:14:10,910 INFO L87 Difference]: Start difference. First operand 283 states and 602 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:11,478 INFO L93 Difference]: Finished difference Result 425 states and 864 transitions. [2021-03-11 00:14:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:14:11,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:14:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:11,480 INFO L225 Difference]: With dead ends: 425 [2021-03-11 00:14:11,480 INFO L226 Difference]: Without dead ends: 423 [2021-03-11 00:14:11,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 508.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:14:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-03-11 00:14:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 283. [2021-03-11 00:14:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.131205673758865) internal successors, (601), 282 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 601 transitions. [2021-03-11 00:14:11,487 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 601 transitions. Word has length 25 [2021-03-11 00:14:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:11,487 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 601 transitions. [2021-03-11 00:14:11,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 601 transitions. [2021-03-11 00:14:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:11,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:11,488 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:11,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:11,707 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:11,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:11,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2001868057, now seen corresponding path program 11 times [2021-03-11 00:14:11,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:11,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391607608] [2021-03-11 00:14:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:11,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391607608] [2021-03-11 00:14:11,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026205770] [2021-03-11 00:14:11,870 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 [2021-03-11 00:14:11,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:14:11,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:11,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:11,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:12,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:12,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-11 00:14:12,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624763719] [2021-03-11 00:14:12,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:14:12,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:12,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:14:12,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:12,251 INFO L87 Difference]: Start difference. First operand 283 states and 601 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:13,045 INFO L93 Difference]: Finished difference Result 715 states and 1488 transitions. [2021-03-11 00:14:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:14:13,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:14:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:13,047 INFO L225 Difference]: With dead ends: 715 [2021-03-11 00:14:13,048 INFO L226 Difference]: Without dead ends: 658 [2021-03-11 00:14:13,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 832.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1812, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:14:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-03-11 00:14:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 340. [2021-03-11 00:14:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.15929203539823) internal successors, (732), 339 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 732 transitions. [2021-03-11 00:14:13,056 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 732 transitions. Word has length 27 [2021-03-11 00:14:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:13,056 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 732 transitions. [2021-03-11 00:14:13,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 732 transitions. [2021-03-11 00:14:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:13,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:13,057 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:13,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-11 00:14:13,258 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:13,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1752108615, now seen corresponding path program 12 times [2021-03-11 00:14:13,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:13,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464477813] [2021-03-11 00:14:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:13,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464477813] [2021-03-11 00:14:13,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652215683] [2021-03-11 00:14:13,461 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 [2021-03-11 00:14:13,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:14:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:13,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:13,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:13,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:13,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-11 00:14:13,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031876341] [2021-03-11 00:14:13,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:14:13,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:13,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:14:13,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:13,880 INFO L87 Difference]: Start difference. First operand 340 states and 732 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:14,732 INFO L93 Difference]: Finished difference Result 699 states and 1463 transitions. [2021-03-11 00:14:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:14:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:14:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:14,736 INFO L225 Difference]: With dead ends: 699 [2021-03-11 00:14:14,736 INFO L226 Difference]: Without dead ends: 654 [2021-03-11 00:14:14,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:14:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-03-11 00:14:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 364. [2021-03-11 00:14:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.159779614325069) internal successors, (784), 363 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 784 transitions. [2021-03-11 00:14:14,744 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 784 transitions. Word has length 27 [2021-03-11 00:14:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:14,744 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 784 transitions. [2021-03-11 00:14:14,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 784 transitions. [2021-03-11 00:14:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:14,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:14,745 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:14,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-11 00:14:14,953 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:14,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1644513465, now seen corresponding path program 13 times [2021-03-11 00:14:14,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:14,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484438246] [2021-03-11 00:14:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:15,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484438246] [2021-03-11 00:14:15,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273823746] [2021-03-11 00:14:15,113 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 [2021-03-11 00:14:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:15,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:15,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-11 00:14:15,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458313066] [2021-03-11 00:14:15,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:14:15,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:15,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:14:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:15,533 INFO L87 Difference]: Start difference. First operand 364 states and 784 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:16,534 INFO L93 Difference]: Finished difference Result 692 states and 1456 transitions. [2021-03-11 00:14:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:14:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:14:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:16,537 INFO L225 Difference]: With dead ends: 692 [2021-03-11 00:14:16,537 INFO L226 Difference]: Without dead ends: 659 [2021-03-11 00:14:16,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 984.7ms TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:14:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-03-11 00:14:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 384. [2021-03-11 00:14:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.156657963446475) internal successors, (826), 383 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 826 transitions. [2021-03-11 00:14:16,546 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 826 transitions. Word has length 27 [2021-03-11 00:14:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:16,546 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 826 transitions. [2021-03-11 00:14:16,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 826 transitions. [2021-03-11 00:14:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:16,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:16,547 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:16,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-11 00:14:16,751 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:16,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1281656179, now seen corresponding path program 14 times [2021-03-11 00:14:16,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:16,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220330187] [2021-03-11 00:14:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:16,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220330187] [2021-03-11 00:14:16,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968868818] [2021-03-11 00:14:16,944 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 [2021-03-11 00:14:16,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:16,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:17,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:17,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-11 00:14:17,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42394204] [2021-03-11 00:14:17,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:14:17,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:14:17,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:17,388 INFO L87 Difference]: Start difference. First operand 384 states and 826 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:18,731 INFO L93 Difference]: Finished difference Result 797 states and 1670 transitions. [2021-03-11 00:14:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:14:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:14:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:18,734 INFO L225 Difference]: With dead ends: 797 [2021-03-11 00:14:18,734 INFO L226 Difference]: Without dead ends: 743 [2021-03-11 00:14:18,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1315.2ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:14:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-03-11 00:14:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 392. [2021-03-11 00:14:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.153452685421995) internal successors, (842), 391 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 842 transitions. [2021-03-11 00:14:18,743 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 842 transitions. Word has length 27 [2021-03-11 00:14:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:18,743 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 842 transitions. [2021-03-11 00:14:18,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 842 transitions. [2021-03-11 00:14:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:18,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:18,744 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:18,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:18,944 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:18,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash 383310963, now seen corresponding path program 15 times [2021-03-11 00:14:18,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:18,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533235568] [2021-03-11 00:14:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:19,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533235568] [2021-03-11 00:14:19,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344815281] [2021-03-11 00:14:19,108 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 [2021-03-11 00:14:19,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:14:19,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:19,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:19,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:19,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-11 00:14:19,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786617390] [2021-03-11 00:14:19,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:14:19,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:19,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:14:19,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:19,499 INFO L87 Difference]: Start difference. First operand 392 states and 842 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:21,230 INFO L93 Difference]: Finished difference Result 863 states and 1797 transitions. [2021-03-11 00:14:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:14:21,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:14:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:21,233 INFO L225 Difference]: With dead ends: 863 [2021-03-11 00:14:21,233 INFO L226 Difference]: Without dead ends: 823 [2021-03-11 00:14:21,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1653.8ms TimeCoverageRelationStatistics Valid=710, Invalid=3322, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:14:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-03-11 00:14:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 403. [2021-03-11 00:14:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.1616915422885574) internal successors, (869), 402 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 869 transitions. [2021-03-11 00:14:21,243 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 869 transitions. Word has length 27 [2021-03-11 00:14:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:21,244 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 869 transitions. [2021-03-11 00:14:21,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 869 transitions. [2021-03-11 00:14:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:21,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:21,244 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:21,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-03-11 00:14:21,457 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:21,457 INFO L82 PathProgramCache]: Analyzing trace with hash 113919671, now seen corresponding path program 16 times [2021-03-11 00:14:21,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:21,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364237350] [2021-03-11 00:14:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:21,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364237350] [2021-03-11 00:14:21,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89997681] [2021-03-11 00:14:21,569 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 [2021-03-11 00:14:21,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:21,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:21,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:14:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:21,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:21,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:14:21,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107092473] [2021-03-11 00:14:21,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:21,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:21,832 INFO L87 Difference]: Start difference. First operand 403 states and 869 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:22,727 INFO L93 Difference]: Finished difference Result 893 states and 1915 transitions. [2021-03-11 00:14:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:14:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:14:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:22,730 INFO L225 Difference]: With dead ends: 893 [2021-03-11 00:14:22,730 INFO L226 Difference]: Without dead ends: 893 [2021-03-11 00:14:22,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 835.5ms TimeCoverageRelationStatistics Valid=438, Invalid=1632, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:14:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-03-11 00:14:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 505. [2021-03-11 00:14:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1944444444444446) internal successors, (1106), 504 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1106 transitions. [2021-03-11 00:14:22,740 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1106 transitions. Word has length 27 [2021-03-11 00:14:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:22,740 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1106 transitions. [2021-03-11 00:14:22,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1106 transitions. [2021-03-11 00:14:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:22,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:22,741 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:22,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:22,955 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1553365309, now seen corresponding path program 17 times [2021-03-11 00:14:22,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:22,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376089775] [2021-03-11 00:14:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:23,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376089775] [2021-03-11 00:14:23,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096138929] [2021-03-11 00:14:23,152 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 [2021-03-11 00:14:23,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:14:23,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:23,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:23,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:23,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:23,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-11 00:14:23,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202395220] [2021-03-11 00:14:23,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:14:23,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:23,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:14:23,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:23,578 INFO L87 Difference]: Start difference. First operand 505 states and 1106 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:25,619 INFO L93 Difference]: Finished difference Result 1442 states and 3048 transitions. [2021-03-11 00:14:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-11 00:14:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:14:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:25,623 INFO L225 Difference]: With dead ends: 1442 [2021-03-11 00:14:25,623 INFO L226 Difference]: Without dead ends: 1387 [2021-03-11 00:14:25,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1925.6ms TimeCoverageRelationStatistics Valid=688, Invalid=4424, Unknown=0, NotChecked=0, Total=5112 [2021-03-11 00:14:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-03-11 00:14:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 586. [2021-03-11 00:14:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.2324786324786325) internal successors, (1306), 585 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1306 transitions. [2021-03-11 00:14:25,638 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1306 transitions. Word has length 27 [2021-03-11 00:14:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:25,638 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1306 transitions. [2021-03-11 00:14:25,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1306 transitions. [2021-03-11 00:14:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:25,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:25,639 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:25,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-11 00:14:25,854 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:25,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:25,854 INFO L82 PathProgramCache]: Analyzing trace with hash -281284249, now seen corresponding path program 18 times [2021-03-11 00:14:25,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:25,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160688978] [2021-03-11 00:14:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:25,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160688978] [2021-03-11 00:14:25,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178485053] [2021-03-11 00:14:25,925 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 [2021-03-11 00:14:25,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-11 00:14:25,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:26,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:26,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:14:26,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718413659] [2021-03-11 00:14:26,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:26,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:26,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:26,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:26,276 INFO L87 Difference]: Start difference. First operand 586 states and 1306 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:26,784 INFO L93 Difference]: Finished difference Result 753 states and 1619 transitions. [2021-03-11 00:14:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:14:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 [2021-03-11 00:14:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:26,787 INFO L225 Difference]: With dead ends: 753 [2021-03-11 00:14:26,787 INFO L226 Difference]: Without dead ends: 747 [2021-03-11 00:14:26,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:14:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-03-11 00:14:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 498. [2021-03-11 00:14:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.221327967806841) internal successors, (1104), 497 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1104 transitions. [2021-03-11 00:14:26,795 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1104 transitions. Word has length 27 [2021-03-11 00:14:26,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:26,795 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 1104 transitions. [2021-03-11 00:14:26,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:26,795 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1104 transitions. [2021-03-11 00:14:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:14:26,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:26,796 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:27,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:27,015 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash -879273425, now seen corresponding path program 19 times [2021-03-11 00:14:27,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:27,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837836195] [2021-03-11 00:14:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:27,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837836195] [2021-03-11 00:14:27,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225848395] [2021-03-11 00:14:27,073 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 [2021-03-11 00:14:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:27,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:14:27,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:27,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:27,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-03-11 00:14:27,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904168071] [2021-03-11 00:14:27,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:27,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:27,259 INFO L87 Difference]: Start difference. First operand 498 states and 1104 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:27,938 INFO L93 Difference]: Finished difference Result 1010 states and 2165 transitions. [2021-03-11 00:14:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:14:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 [2021-03-11 00:14:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:27,941 INFO L225 Difference]: With dead ends: 1010 [2021-03-11 00:14:27,941 INFO L226 Difference]: Without dead ends: 1006 [2021-03-11 00:14:27,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=559, Invalid=1891, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:14:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-03-11 00:14:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 631. [2021-03-11 00:14:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.2476190476190476) internal successors, (1416), 630 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1416 transitions. [2021-03-11 00:14:27,953 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1416 transitions. Word has length 27 [2021-03-11 00:14:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:27,953 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 1416 transitions. [2021-03-11 00:14:27,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1416 transitions. [2021-03-11 00:14:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:14:27,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:27,954 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:28,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-11 00:14:28,167 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash -335260507, now seen corresponding path program 20 times [2021-03-11 00:14:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:28,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691688272] [2021-03-11 00:14:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:28,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691688272] [2021-03-11 00:14:28,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626302615] [2021-03-11 00:14:28,242 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 [2021-03-11 00:14:28,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:28,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:28,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:14:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:28,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:28,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:14:28,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365344002] [2021-03-11 00:14:28,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:28,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:28,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:28,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:28,450 INFO L87 Difference]: Start difference. First operand 631 states and 1416 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:29,130 INFO L93 Difference]: Finished difference Result 1061 states and 2237 transitions. [2021-03-11 00:14:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:14:29,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:14:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:29,134 INFO L225 Difference]: With dead ends: 1061 [2021-03-11 00:14:29,134 INFO L226 Difference]: Without dead ends: 1061 [2021-03-11 00:14:29,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:14:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-03-11 00:14:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 663. [2021-03-11 00:14:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.2598187311178246) internal successors, (1496), 662 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1496 transitions. [2021-03-11 00:14:29,145 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1496 transitions. Word has length 29 [2021-03-11 00:14:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:29,145 INFO L480 AbstractCegarLoop]: Abstraction has 663 states and 1496 transitions. [2021-03-11 00:14:29,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1496 transitions. [2021-03-11 00:14:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:14:29,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:29,146 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:29,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:29,359 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:29,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2063984225, now seen corresponding path program 21 times [2021-03-11 00:14:29,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:29,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919036860] [2021-03-11 00:14:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:29,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919036860] [2021-03-11 00:14:29,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027640721] [2021-03-11 00:14:29,408 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 [2021-03-11 00:14:29,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:14:29,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:29,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:14:29,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:29,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:29,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-03-11 00:14:29,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182949459] [2021-03-11 00:14:29,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:14:29,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:29,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:14:29,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:14:29,630 INFO L87 Difference]: Start difference. First operand 663 states and 1496 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:30,634 INFO L93 Difference]: Finished difference Result 899 states and 1939 transitions. [2021-03-11 00:14:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:14:30,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:14:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:30,637 INFO L225 Difference]: With dead ends: 899 [2021-03-11 00:14:30,637 INFO L226 Difference]: Without dead ends: 895 [2021-03-11 00:14:30,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 929.9ms TimeCoverageRelationStatistics Valid=1000, Invalid=3032, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:14:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-03-11 00:14:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 631. [2021-03-11 00:14:30,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.242857142857143) internal successors, (1413), 630 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1413 transitions. [2021-03-11 00:14:30,648 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1413 transitions. Word has length 29 [2021-03-11 00:14:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:30,648 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 1413 transitions. [2021-03-11 00:14:30,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1413 transitions. [2021-03-11 00:14:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:14:30,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:30,650 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:30,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-11 00:14:30,865 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2078249141, now seen corresponding path program 22 times [2021-03-11 00:14:30,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:30,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533355932] [2021-03-11 00:14:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:31,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533355932] [2021-03-11 00:14:31,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828871693] [2021-03-11 00:14:31,046 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:31,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:31,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:31,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:14:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:31,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:31,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-03-11 00:14:31,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330477869] [2021-03-11 00:14:31,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:14:31,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:14:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:14:31,572 INFO L87 Difference]: Start difference. First operand 631 states and 1413 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:33,516 INFO L93 Difference]: Finished difference Result 867 states and 1882 transitions. [2021-03-11 00:14:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:14:33,517 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 29 [2021-03-11 00:14:33,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:33,519 INFO L225 Difference]: With dead ends: 867 [2021-03-11 00:14:33,519 INFO L226 Difference]: Without dead ends: 852 [2021-03-11 00:14:33,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1876.1ms TimeCoverageRelationStatistics Valid=350, Invalid=3310, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:14:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-03-11 00:14:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 684. [2021-03-11 00:14:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.278184480234261) internal successors, (1556), 683 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1556 transitions. [2021-03-11 00:14:33,530 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1556 transitions. Word has length 29 [2021-03-11 00:14:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:33,530 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1556 transitions. [2021-03-11 00:14:33,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1556 transitions. [2021-03-11 00:14:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:14:33,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:33,532 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:33,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:33,747 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1513036227, now seen corresponding path program 23 times [2021-03-11 00:14:33,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:33,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873722666] [2021-03-11 00:14:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:33,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873722666] [2021-03-11 00:14:33,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334494770] [2021-03-11 00:14:33,939 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:33,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:14:33,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:14:33,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:34,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:34,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-03-11 00:14:34,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694837745] [2021-03-11 00:14:34,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:14:34,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:34,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:14:34,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:14:34,384 INFO L87 Difference]: Start difference. First operand 684 states and 1556 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:36,097 INFO L93 Difference]: Finished difference Result 986 states and 2173 transitions. [2021-03-11 00:14:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:14:36,098 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:14:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:36,101 INFO L225 Difference]: With dead ends: 986 [2021-03-11 00:14:36,101 INFO L226 Difference]: Without dead ends: 986 [2021-03-11 00:14:36,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1634.1ms TimeCoverageRelationStatistics Valid=492, Invalid=3414, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:14:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-03-11 00:14:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 685. [2021-03-11 00:14:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 2.280701754385965) internal successors, (1560), 684 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1560 transitions. [2021-03-11 00:14:36,112 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1560 transitions. Word has length 29 [2021-03-11 00:14:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:36,113 INFO L480 AbstractCegarLoop]: Abstraction has 685 states and 1560 transitions. [2021-03-11 00:14:36,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1560 transitions. [2021-03-11 00:14:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:14:36,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:36,114 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:36,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-11 00:14:36,330 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash -862967257, now seen corresponding path program 24 times [2021-03-11 00:14:36,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:36,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613204994] [2021-03-11 00:14:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:36,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613204994] [2021-03-11 00:14:36,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372177678] [2021-03-11 00:14:36,538 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:36,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:14:36,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:36,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-11 00:14:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-03-11 00:28:44,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:44,212 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:28:44,215 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:28:44,216 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:28:44 BasicIcfg [2021-03-11 00:28:44,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:28:44,216 INFO L168 Benchmark]: Toolchain (without parser) took 884137.33 ms. Allocated memory was 255.9 MB in the beginning and 763.4 MB in the end (delta: 507.5 MB). Free memory was 236.5 MB in the beginning and 505.1 MB in the end (delta: -268.5 MB). Peak memory consumption was 469.3 MB. Max. memory is 16.0 GB. [2021-03-11 00:28:44,217 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:28:44,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.44 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:28:44,217 INFO L168 Benchmark]: Boogie Preprocessor took 16.82 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 971.4 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-11 00:28:44,217 INFO L168 Benchmark]: RCFGBuilder took 278.34 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 238.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. [2021-03-11 00:28:44,217 INFO L168 Benchmark]: TraceAbstraction took 883806.09 ms. Allocated memory was 255.9 MB in the beginning and 763.4 MB in the end (delta: 507.5 MB). Free memory was 238.0 MB in the beginning and 505.1 MB in the end (delta: -267.1 MB). Peak memory consumption was 469.6 MB. Max. memory is 16.0 GB. [2021-03-11 00:28:44,217 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 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.44 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.82 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 971.4 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 278.34 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 238.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 883806.09 ms. Allocated memory was 255.9 MB in the beginning and 763.4 MB in the end (delta: 507.5 MB). Free memory was 238.0 MB in the beginning and 505.1 MB in the end (delta: -267.1 MB). Peak memory consumption was 469.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 51). Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 883699.9ms, OverallIterations: 26, TraceHistogramMax: 4, EmptinessCheckTime: 26.9ms, AutomataDifference: 20541.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 669 SDtfs, 4828 SDslu, 5773 SDs, 0 SdLazy, 11666 SolverSat, 1278 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4992.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1422 GetRequests, 386 SyntacticMatches, 17 SemanticMatches, 1019 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14037 ImplicationChecksByTransitivity, 19464.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=685occurred in iteration=25, InterpolantAutomatonStates: 708, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 239.6ms AutomataMinimizationTime, 25 MinimizatonAttempts, 6170 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.2ms SsaConstructionTime, 361.1ms SatisfiabilityAnalysisTime, 9188.3ms InterpolantComputationTime, 1202 NumberOfCodeBlocks, 1202 NumberOfCodeBlocksAsserted, 91 NumberOfCheckSat, 1154 ConstructedInterpolants, 0 QuantifiedInterpolants, 12259 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1267 ConjunctsInSsa, 423 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 105/681 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