/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:59:21,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:59:21,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:59:21,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:59:21,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 15:59:21,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 15:59:21,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 15:59:21,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 15:59:21,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 15:59:21,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 15:59:21,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 15:59:21,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 15:59:21,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:59:21,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:59:21,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:59:21,415 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-Separate.epf [2021-06-05 15:59:21,444 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:59:21,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:59:21,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:59:21,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:59:21,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:59:21,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:59:21,446 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:59:21,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:59:21,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:59:21,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:59:21,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:59:21,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:59:21,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:59:21,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:59:21,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:59:21,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:59:21,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:59:21,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:59:21,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:59:21,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:59:21,449 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:59:21,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:59:21,449 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:59:21,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:59:21,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:59:21,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:59:21,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:59:21,709 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:59:21,710 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:59:21,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2021-06-05 15:59:21,711 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2021-06-05 15:59:21,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:59:21,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:59:21,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:59:21,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:59:21,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:59:21,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:59:21,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:59:21,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:59:21,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:59:21,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... [2021-06-05 15:59:21,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:59:21,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:59:21,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:59:21,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:59:21,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:59:21,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:59:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:59:21,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:59:21,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:59:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:59:21,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:59:21,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:59:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:59:21,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:59:21,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:59:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:59:21,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:59:21,864 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:59:22,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:59:22,214 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 15:59:22,215 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 15:59:22,215 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 15:59:22,215 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 15:59:22,216 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:59:22 BoogieIcfgContainer [2021-06-05 15:59:22,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:59:22,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:59:22,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:59:22,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:59:22,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:59:21" (1/2) ... [2021-06-05 15:59:22,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668358 and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:59:22, skipping insertion in model container [2021-06-05 15:59:22,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:59:22" (2/2) ... [2021-06-05 15:59:22,231 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2021-06-05 15:59:22,235 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:59:22,235 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:59:22,235 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:59:22,236 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:59:22,285 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 15:59:22,301 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 15:59:22,326 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:59:22,326 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:59:22,326 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:59:22,326 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:59:22,326 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:59:22,326 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:59:22,326 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:59:22,326 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:59:22,333 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 64 flow [2021-06-05 15:59:22,342 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 15:59:22,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:22,349 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:22,349 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash -628206710, now seen corresponding path program 1 times [2021-06-05 15:59:22,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:22,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56652119] [2021-06-05 15:59:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:22,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:22,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56652119] [2021-06-05 15:59:22,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56652119] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:59:22,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:59:22,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:59:22,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362416747] [2021-06-05 15:59:22,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:59:22,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:59:22,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:59:22,469 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:22,503 INFO L93 Difference]: Finished difference Result 46 states and 118 transitions. [2021-06-05 15:59:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:59:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-06-05 15:59:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:22,513 INFO L225 Difference]: With dead ends: 46 [2021-06-05 15:59:22,513 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 15:59:22,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:59:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 15:59:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-06-05 15:59:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 109 transitions. [2021-06-05 15:59:22,544 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 109 transitions. Word has length 12 [2021-06-05 15:59:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:22,545 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 109 transitions. [2021-06-05 15:59:22,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 109 transitions. [2021-06-05 15:59:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 15:59:22,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:22,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:22,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:59:22,546 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash 402586222, now seen corresponding path program 1 times [2021-06-05 15:59:22,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:22,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383709507] [2021-06-05 15:59:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:22,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:22,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383709507] [2021-06-05 15:59:22,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383709507] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:59:22,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:59:22,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:59:22,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826748823] [2021-06-05 15:59:22,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:59:22,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:22,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:59:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:59:22,611 INFO L87 Difference]: Start difference. First operand 42 states and 109 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:22,625 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2021-06-05 15:59:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:59:22,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-06-05 15:59:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:22,627 INFO L225 Difference]: With dead ends: 59 [2021-06-05 15:59:22,627 INFO L226 Difference]: Without dead ends: 57 [2021-06-05 15:59:22,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:59:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-05 15:59:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-06-05 15:59:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2021-06-05 15:59:22,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 13 [2021-06-05 15:59:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:22,642 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2021-06-05 15:59:22,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,643 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2021-06-05 15:59:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 15:59:22,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:22,644 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:22,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:59:22,644 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1959261122, now seen corresponding path program 1 times [2021-06-05 15:59:22,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:22,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505753242] [2021-06-05 15:59:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:22,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:22,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505753242] [2021-06-05 15:59:22,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505753242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:22,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716680420] [2021-06-05 15:59:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:22,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:59:22,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:22,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716680420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:22,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:22,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 15:59:22,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520142235] [2021-06-05 15:59:22,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:59:22,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:22,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:59:22,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:59:22,861 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:22,887 INFO L93 Difference]: Finished difference Result 65 states and 168 transitions. [2021-06-05 15:59:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:59:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 13 [2021-06-05 15:59:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:22,889 INFO L225 Difference]: With dead ends: 65 [2021-06-05 15:59:22,889 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 15:59:22,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:59:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 15:59:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-06-05 15:59:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 52 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 141 transitions. [2021-06-05 15:59:22,893 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 141 transitions. Word has length 13 [2021-06-05 15:59:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:22,893 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 141 transitions. [2021-06-05 15:59:22,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 141 transitions. [2021-06-05 15:59:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 15:59:22,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:22,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:23,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 15:59:23,101 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:23,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1085270368, now seen corresponding path program 1 times [2021-06-05 15:59:23,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:23,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221846623] [2021-06-05 15:59:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:23,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:23,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221846623] [2021-06-05 15:59:23,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221846623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:23,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966039696] [2021-06-05 15:59:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:59:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966039696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:23,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:23,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 15:59:23,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32637478] [2021-06-05 15:59:23,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:59:23,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:23,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:59:23,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:59:23,237 INFO L87 Difference]: Start difference. First operand 53 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:23,248 INFO L93 Difference]: Finished difference Result 68 states and 170 transitions. [2021-06-05 15:59:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:59:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 15:59:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:23,249 INFO L225 Difference]: With dead ends: 68 [2021-06-05 15:59:23,249 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 15:59:23,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:59:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 15:59:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-06-05 15:59:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 126 transitions. [2021-06-05 15:59:23,253 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 126 transitions. Word has length 13 [2021-06-05 15:59:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:23,253 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 126 transitions. [2021-06-05 15:59:23,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 126 transitions. [2021-06-05 15:59:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 15:59:23,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:23,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:23,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:23,486 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:23,486 INFO L82 PathProgramCache]: Analyzing trace with hash -242961336, now seen corresponding path program 1 times [2021-06-05 15:59:23,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:23,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980607415] [2021-06-05 15:59:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:23,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:23,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980607415] [2021-06-05 15:59:23,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980607415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:59:23,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:59:23,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:59:23,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067334109] [2021-06-05 15:59:23,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:59:23,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:23,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:59:23,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:59:23,529 INFO L87 Difference]: Start difference. First operand 49 states and 126 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:23,539 INFO L93 Difference]: Finished difference Result 29 states and 63 transitions. [2021-06-05 15:59:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:59:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 15:59:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:23,540 INFO L225 Difference]: With dead ends: 29 [2021-06-05 15:59:23,540 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 15:59:23,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:59:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 15:59:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 15:59:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 62 transitions. [2021-06-05 15:59:23,542 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 62 transitions. Word has length 14 [2021-06-05 15:59:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:23,543 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 62 transitions. [2021-06-05 15:59:23,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:23,543 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 62 transitions. [2021-06-05 15:59:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 15:59:23,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:23,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:23,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:59:23,543 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:23,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:23,544 INFO L82 PathProgramCache]: Analyzing trace with hash -757524308, now seen corresponding path program 1 times [2021-06-05 15:59:23,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:23,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329288936] [2021-06-05 15:59:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:23,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:23,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329288936] [2021-06-05 15:59:23,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329288936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:23,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068795027] [2021-06-05 15:59:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:59:23,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068795027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:23,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:23,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 15:59:23,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102788480] [2021-06-05 15:59:23,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:59:23,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:23,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:59:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:59:23,737 INFO L87 Difference]: Start difference. First operand 28 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:23,776 INFO L93 Difference]: Finished difference Result 47 states and 113 transitions. [2021-06-05 15:59:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:59:23,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 15:59:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:23,778 INFO L225 Difference]: With dead ends: 47 [2021-06-05 15:59:23,778 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 15:59:23,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:59:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 15:59:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-06-05 15:59:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 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) [2021-06-05 15:59:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 103 transitions. [2021-06-05 15:59:23,792 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 103 transitions. Word has length 14 [2021-06-05 15:59:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:23,792 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 103 transitions. [2021-06-05 15:59:23,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 103 transitions. [2021-06-05 15:59:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:59:23,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:23,793 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:23,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:23,994 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1436036254, now seen corresponding path program 1 times [2021-06-05 15:59:23,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:23,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195479079] [2021-06-05 15:59:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:24,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:24,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195479079] [2021-06-05 15:59:24,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195479079] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:59:24,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:59:24,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:59:24,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985795164] [2021-06-05 15:59:24,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:59:24,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:24,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:59:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:59:24,037 INFO L87 Difference]: Start difference. First operand 42 states and 103 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-06-05 15:59:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:24,049 INFO L93 Difference]: Finished difference Result 60 states and 135 transitions. [2021-06-05 15:59:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:59:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2021-06-05 15:59:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:24,050 INFO L225 Difference]: With dead ends: 60 [2021-06-05 15:59:24,050 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 15:59:24,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:59:24,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 15:59:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-06-05 15:59:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-06-05 15:59:24,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2021-06-05 15:59:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:24,053 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-06-05 15:59:24,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-06-05 15:59:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-06-05 15:59:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:59:24,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:24,054 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:24,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 15:59:24,054 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2049584416, now seen corresponding path program 2 times [2021-06-05 15:59:24,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:24,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763060737] [2021-06-05 15:59:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:24,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:24,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763060737] [2021-06-05 15:59:24,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763060737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:24,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396632197] [2021-06-05 15:59:24,127 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:24,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:59:24,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:24,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396632197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:24,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:24,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 15:59:24,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126100682] [2021-06-05 15:59:24,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:59:24,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:24,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:59:24,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:59:24,258 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:24,312 INFO L93 Difference]: Finished difference Result 77 states and 188 transitions. [2021-06-05 15:59:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:59:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-06-05 15:59:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:24,313 INFO L225 Difference]: With dead ends: 77 [2021-06-05 15:59:24,313 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 15:59:24,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:59:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 15:59:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-06-05 15:59:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2021-06-05 15:59:24,316 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 15 [2021-06-05 15:59:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:24,316 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2021-06-05 15:59:24,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2021-06-05 15:59:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:59:24,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:24,317 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:24,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:24,535 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash 833536548, now seen corresponding path program 3 times [2021-06-05 15:59:24,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:24,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521089648] [2021-06-05 15:59:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:24,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:24,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521089648] [2021-06-05 15:59:24,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521089648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:24,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539063944] [2021-06-05 15:59:24,584 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:24,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:59:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:59:24,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:24,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539063944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:24,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:24,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 15:59:24,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251153678] [2021-06-05 15:59:24,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:59:24,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:24,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:59:24,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:59:24,776 INFO L87 Difference]: Start difference. First operand 51 states and 129 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:24,850 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2021-06-05 15:59:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:59:24,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-06-05 15:59:24,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:24,852 INFO L225 Difference]: With dead ends: 80 [2021-06-05 15:59:24,852 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 15:59:24,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:59:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 15:59:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-06-05 15:59:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 56 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) [2021-06-05 15:59:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 151 transitions. [2021-06-05 15:59:24,860 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 151 transitions. Word has length 15 [2021-06-05 15:59:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:24,860 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 151 transitions. [2021-06-05 15:59:24,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 151 transitions. [2021-06-05 15:59:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:59:24,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:24,863 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:25,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:25,077 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash 36878570, now seen corresponding path program 2 times [2021-06-05 15:59:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:25,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284932518] [2021-06-05 15:59:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:25,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:25,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284932518] [2021-06-05 15:59:25,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284932518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:25,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851111500] [2021-06-05 15:59:25,141 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:25,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:25,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:25,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:59:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:25,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851111500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:25,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:25,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 15:59:25,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692667751] [2021-06-05 15:59:25,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:59:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:59:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:59:25,435 INFO L87 Difference]: Start difference. First operand 57 states and 151 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:25,583 INFO L93 Difference]: Finished difference Result 118 states and 329 transitions. [2021-06-05 15:59:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:59:25,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 16 [2021-06-05 15:59:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:25,584 INFO L225 Difference]: With dead ends: 118 [2021-06-05 15:59:25,584 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 15:59:25,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:59:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 15:59:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-06-05 15:59:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 3.0675675675675675) internal successors, (227), 74 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 227 transitions. [2021-06-05 15:59:25,586 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 227 transitions. Word has length 16 [2021-06-05 15:59:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:25,587 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 227 transitions. [2021-06-05 15:59:25,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 227 transitions. [2021-06-05 15:59:25,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:59:25,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:25,587 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:25,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:25,807 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:25,807 INFO L82 PathProgramCache]: Analyzing trace with hash 846225196, now seen corresponding path program 4 times [2021-06-05 15:59:25,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:25,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631493386] [2021-06-05 15:59:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:25,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:25,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631493386] [2021-06-05 15:59:25,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631493386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:25,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548678837] [2021-06-05 15:59:25,870 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:25,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:59:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:25,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548678837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:25,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:25,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:59:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899705707] [2021-06-05 15:59:25,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:59:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:59:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:59:25,974 INFO L87 Difference]: Start difference. First operand 75 states and 227 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:26,012 INFO L93 Difference]: Finished difference Result 80 states and 225 transitions. [2021-06-05 15:59:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:59:26,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 16 [2021-06-05 15:59:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:26,013 INFO L225 Difference]: With dead ends: 80 [2021-06-05 15:59:26,013 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 15:59:26,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:59:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 15:59:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-06-05 15:59:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.943661971830986) internal successors, (209), 71 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 209 transitions. [2021-06-05 15:59:26,018 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 209 transitions. Word has length 16 [2021-06-05 15:59:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:26,019 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 209 transitions. [2021-06-05 15:59:26,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 209 transitions. [2021-06-05 15:59:26,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:59:26,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:26,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:26,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:59:26,233 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash 292721696, now seen corresponding path program 3 times [2021-06-05 15:59:26,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:26,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424133598] [2021-06-05 15:59:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:26,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:26,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424133598] [2021-06-05 15:59:26,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424133598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:26,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273325676] [2021-06-05 15:59:26,301 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:26,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:59:26,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:26,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:59:26,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:26,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273325676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:26,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:26,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 15:59:26,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795738962] [2021-06-05 15:59:26,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:59:26,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:59:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:59:26,483 INFO L87 Difference]: Start difference. First operand 72 states and 209 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:26,603 INFO L93 Difference]: Finished difference Result 130 states and 354 transitions. [2021-06-05 15:59:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:59:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2021-06-05 15:59:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:26,604 INFO L225 Difference]: With dead ends: 130 [2021-06-05 15:59:26,604 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 15:59:26,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:59:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 15:59:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2021-06-05 15:59:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 3.075) internal successors, (246), 80 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 246 transitions. [2021-06-05 15:59:26,607 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 246 transitions. Word has length 17 [2021-06-05 15:59:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:26,607 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 246 transitions. [2021-06-05 15:59:26,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 246 transitions. [2021-06-05 15:59:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:59:26,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:26,608 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:26,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:59:26,825 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:26,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1102068322, now seen corresponding path program 4 times [2021-06-05 15:59:26,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:26,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38134953] [2021-06-05 15:59:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:26,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:26,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38134953] [2021-06-05 15:59:26,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38134953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:26,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042157375] [2021-06-05 15:59:26,897 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:26,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:26,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:26,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:59:26,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:27,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042157375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:27,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:27,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:59:27,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247047960] [2021-06-05 15:59:27,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:59:27,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:27,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:59:27,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:59:27,055 INFO L87 Difference]: Start difference. First operand 81 states and 246 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:27,153 INFO L93 Difference]: Finished difference Result 94 states and 267 transitions. [2021-06-05 15:59:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:59:27,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2021-06-05 15:59:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:27,154 INFO L225 Difference]: With dead ends: 94 [2021-06-05 15:59:27,154 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 15:59:27,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:59:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 15:59:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-06-05 15:59:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 3.049382716049383) internal successors, (247), 81 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 247 transitions. [2021-06-05 15:59:27,157 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 247 transitions. Word has length 17 [2021-06-05 15:59:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:27,157 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 247 transitions. [2021-06-05 15:59:27,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 247 transitions. [2021-06-05 15:59:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:59:27,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:27,157 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:27,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:27,375 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:27,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1878688318, now seen corresponding path program 5 times [2021-06-05 15:59:27,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:27,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457675705] [2021-06-05 15:59:27,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:27,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:27,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457675705] [2021-06-05 15:59:27,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457675705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:27,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715663032] [2021-06-05 15:59:27,434 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:27,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:59:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:59:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:27,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715663032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:27,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:27,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 15:59:27,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994275987] [2021-06-05 15:59:27,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:59:27,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:27,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:59:27,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:59:27,556 INFO L87 Difference]: Start difference. First operand 82 states and 247 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:27,575 INFO L93 Difference]: Finished difference Result 110 states and 254 transitions. [2021-06-05 15:59:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:59:27,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2021-06-05 15:59:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:27,576 INFO L225 Difference]: With dead ends: 110 [2021-06-05 15:59:27,576 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 15:59:27,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:59:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 15:59:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2021-06-05 15:59:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 179 transitions. [2021-06-05 15:59:27,579 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 179 transitions. Word has length 17 [2021-06-05 15:59:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:27,579 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 179 transitions. [2021-06-05 15:59:27,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 179 transitions. [2021-06-05 15:59:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:59:27,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:27,580 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:27,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:27,789 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash -366075990, now seen corresponding path program 5 times [2021-06-05 15:59:27,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:27,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931783506] [2021-06-05 15:59:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:27,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931783506] [2021-06-05 15:59:27,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931783506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401439424] [2021-06-05 15:59:27,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:27,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:59:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:27,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:59:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:28,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401439424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:28,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:28,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 15:59:28,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967865316] [2021-06-05 15:59:28,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:59:28,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:59:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:59:28,009 INFO L87 Difference]: Start difference. First operand 69 states and 179 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:28,102 INFO L93 Difference]: Finished difference Result 190 states and 501 transitions. [2021-06-05 15:59:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:59:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 15:59:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:28,104 INFO L225 Difference]: With dead ends: 190 [2021-06-05 15:59:28,104 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 15:59:28,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:59:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 15:59:28,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 106. [2021-06-05 15:59:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.1333333333333333) internal successors, (329), 105 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 329 transitions. [2021-06-05 15:59:28,107 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 329 transitions. Word has length 18 [2021-06-05 15:59:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:28,107 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 329 transitions. [2021-06-05 15:59:28,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 329 transitions. [2021-06-05 15:59:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:59:28,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:28,107 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:28,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:59:28,308 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash 443270636, now seen corresponding path program 6 times [2021-06-05 15:59:28,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:28,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29023129] [2021-06-05 15:59:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:28,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:28,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29023129] [2021-06-05 15:59:28,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29023129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999303972] [2021-06-05 15:59:28,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:28,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:59:28,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:59:28,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999303972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:28,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:28,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:59:28,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76922086] [2021-06-05 15:59:28,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:59:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:59:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:59:28,587 INFO L87 Difference]: Start difference. First operand 106 states and 329 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:28,635 INFO L93 Difference]: Finished difference Result 120 states and 354 transitions. [2021-06-05 15:59:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:59:28,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 15:59:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:28,636 INFO L225 Difference]: With dead ends: 120 [2021-06-05 15:59:28,636 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 15:59:28,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:59:28,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 15:59:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-06-05 15:59:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 3.074074074074074) internal successors, (332), 108 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 332 transitions. [2021-06-05 15:59:28,639 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 332 transitions. Word has length 18 [2021-06-05 15:59:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:28,639 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 332 transitions. [2021-06-05 15:59:28,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 332 transitions. [2021-06-05 15:59:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:59:28,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:28,641 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:28,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:28,859 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:28,859 INFO L82 PathProgramCache]: Analyzing trace with hash 5973854, now seen corresponding path program 7 times [2021-06-05 15:59:28,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:28,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823563278] [2021-06-05 15:59:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:28,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:28,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823563278] [2021-06-05 15:59:28,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823563278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:28,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800582128] [2021-06-05 15:59:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:28,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:59:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:29,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800582128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:29,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:29,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 15:59:29,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457507590] [2021-06-05 15:59:29,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:59:29,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:29,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:59:29,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:59:29,178 INFO L87 Difference]: Start difference. First operand 109 states and 332 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:29,282 INFO L93 Difference]: Finished difference Result 60 states and 141 transitions. [2021-06-05 15:59:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:59:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-06-05 15:59:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:29,284 INFO L225 Difference]: With dead ends: 60 [2021-06-05 15:59:29,284 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 15:59:29,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:59:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 15:59:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-06-05 15:59:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 134 transitions. [2021-06-05 15:59:29,286 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 134 transitions. Word has length 19 [2021-06-05 15:59:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:29,287 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 134 transitions. [2021-06-05 15:59:29,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 134 transitions. [2021-06-05 15:59:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:59:29,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:29,287 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:29,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:59:29,503 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:29,503 INFO L82 PathProgramCache]: Analyzing trace with hash 815320480, now seen corresponding path program 8 times [2021-06-05 15:59:29,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:29,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52524341] [2021-06-05 15:59:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:29,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:29,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52524341] [2021-06-05 15:59:29,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52524341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:29,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114080337] [2021-06-05 15:59:29,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:29,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:59:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:29,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114080337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:29,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:29,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:59:29,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347668834] [2021-06-05 15:59:29,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:59:29,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:59:29,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:59:29,890 INFO L87 Difference]: Start difference. First operand 55 states and 134 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:30,022 INFO L93 Difference]: Finished difference Result 71 states and 176 transitions. [2021-06-05 15:59:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:59:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-06-05 15:59:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:30,023 INFO L225 Difference]: With dead ends: 71 [2021-06-05 15:59:30,023 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 15:59:30,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:59:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 15:59:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-06-05 15:59:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.564516129032258) internal successors, (159), 62 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-06-05 15:59:30,025 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 19 [2021-06-05 15:59:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:30,025 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-06-05 15:59:30,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-06-05 15:59:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:59:30,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:30,025 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:30,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:30,237 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1345382870, now seen corresponding path program 9 times [2021-06-05 15:59:30,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:30,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46047401] [2021-06-05 15:59:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:30,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:30,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46047401] [2021-06-05 15:59:30,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46047401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:30,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419550014] [2021-06-05 15:59:30,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:30,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:59:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:59:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:30,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 15:59:30,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:30,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 15:59:30,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:30,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:30,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 15:59:30,604 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 15:59:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:30,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419550014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:30,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:30,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 15:59:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659468801] [2021-06-05 15:59:30,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:59:30,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:59:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:59:30,687 INFO L87 Difference]: Start difference. First operand 63 states and 159 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-06-05 15:59:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:30,928 INFO L93 Difference]: Finished difference Result 392 states and 980 transitions. [2021-06-05 15:59:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:59:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 20 [2021-06-05 15:59:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:30,930 INFO L225 Difference]: With dead ends: 392 [2021-06-05 15:59:30,930 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 15:59:30,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:59:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 15:59:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 137. [2021-06-05 15:59:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.25) internal successors, (442), 136 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 442 transitions. [2021-06-05 15:59:30,934 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 442 transitions. Word has length 20 [2021-06-05 15:59:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:30,934 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 442 transitions. [2021-06-05 15:59:30,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-06-05 15:59:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 442 transitions. [2021-06-05 15:59:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:59:30,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:30,935 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:31,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:59:31,149 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:31,149 INFO L82 PathProgramCache]: Analyzing trace with hash -536036244, now seen corresponding path program 10 times [2021-06-05 15:59:31,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:31,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527974807] [2021-06-05 15:59:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:31,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:31,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527974807] [2021-06-05 15:59:31,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527974807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:31,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007273330] [2021-06-05 15:59:31,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:31,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:59:31,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007273330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:31,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:31,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 15:59:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731098858] [2021-06-05 15:59:31,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:59:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:59:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:59:31,585 INFO L87 Difference]: Start difference. First operand 137 states and 442 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 15:59:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:31,691 INFO L93 Difference]: Finished difference Result 96 states and 272 transitions. [2021-06-05 15:59:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:59:31,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 20 [2021-06-05 15:59:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:31,692 INFO L225 Difference]: With dead ends: 96 [2021-06-05 15:59:31,692 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 15:59:31,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:59:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 15:59:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-06-05 15:59:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.9529411764705884) internal successors, (251), 85 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 251 transitions. [2021-06-05 15:59:31,694 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 251 transitions. Word has length 20 [2021-06-05 15:59:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:31,694 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 251 transitions. [2021-06-05 15:59:31,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-06-05 15:59:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 251 transitions. [2021-06-05 15:59:31,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:59:31,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:31,695 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:31,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:31,897 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1129551998, now seen corresponding path program 11 times [2021-06-05 15:59:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:31,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968410608] [2021-06-05 15:59:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:31,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:31,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968410608] [2021-06-05 15:59:31,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968410608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:31,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716385093] [2021-06-05 15:59:31,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:32,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:59:32,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:32,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:59:32,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:32,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716385093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:32,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:32,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:59:32,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646056815] [2021-06-05 15:59:32,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:59:32,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:32,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:59:32,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:59:32,436 INFO L87 Difference]: Start difference. First operand 86 states and 251 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:32,491 INFO L93 Difference]: Finished difference Result 93 states and 262 transitions. [2021-06-05 15:59:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:59:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-06-05 15:59:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:32,492 INFO L225 Difference]: With dead ends: 93 [2021-06-05 15:59:32,492 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 15:59:32,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:59:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 15:59:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-06-05 15:59:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.929411764705882) internal successors, (249), 85 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 249 transitions. [2021-06-05 15:59:32,494 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 249 transitions. Word has length 21 [2021-06-05 15:59:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:32,495 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 249 transitions. [2021-06-05 15:59:32,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 249 transitions. [2021-06-05 15:59:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:59:32,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:32,495 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:32,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:59:32,711 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:32,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2003542752, now seen corresponding path program 12 times [2021-06-05 15:59:32,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:32,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502754039] [2021-06-05 15:59:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:32,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:32,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502754039] [2021-06-05 15:59:32,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502754039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:32,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587472913] [2021-06-05 15:59:32,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:32,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:59:32,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:32,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:59:32,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:33,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 15:59:33,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:33,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:33,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 15:59:33,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:33,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:33,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 15:59:33,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-06-05 15:59:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:33,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587472913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:33,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:33,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 15:59:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361421335] [2021-06-05 15:59:33,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:59:33,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:59:33,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:59:33,244 INFO L87 Difference]: Start difference. First operand 86 states and 249 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:33,295 INFO L93 Difference]: Finished difference Result 106 states and 294 transitions. [2021-06-05 15:59:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:59:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-06-05 15:59:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:33,296 INFO L225 Difference]: With dead ends: 106 [2021-06-05 15:59:33,296 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 15:59:33,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:59:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 15:59:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-06-05 15:59:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.891304347826087) internal successors, (266), 92 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 266 transitions. [2021-06-05 15:59:33,298 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 266 transitions. Word has length 21 [2021-06-05 15:59:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:33,298 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 266 transitions. [2021-06-05 15:59:33,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 266 transitions. [2021-06-05 15:59:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:59:33,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:33,299 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:33,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:59:33,513 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2021450516, now seen corresponding path program 13 times [2021-06-05 15:59:33,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:33,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960572849] [2021-06-05 15:59:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:33,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:33,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960572849] [2021-06-05 15:59:33,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960572849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:33,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764645607] [2021-06-05 15:59:33,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:59:33,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:34,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764645607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:34,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:34,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 15:59:34,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135539888] [2021-06-05 15:59:34,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:59:34,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:34,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:59:34,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:59:34,157 INFO L87 Difference]: Start difference. First operand 93 states and 266 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-06-05 15:59:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:34,361 INFO L93 Difference]: Finished difference Result 132 states and 353 transitions. [2021-06-05 15:59:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:59:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 22 [2021-06-05 15:59:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:34,362 INFO L225 Difference]: With dead ends: 132 [2021-06-05 15:59:34,362 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 15:59:34,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 543.5ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:59:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 15:59:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-06-05 15:59:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.92) internal successors, (292), 100 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 292 transitions. [2021-06-05 15:59:34,366 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 292 transitions. Word has length 22 [2021-06-05 15:59:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:34,366 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 292 transitions. [2021-06-05 15:59:34,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-06-05 15:59:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 292 transitions. [2021-06-05 15:59:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:59:34,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:34,366 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:34,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:34,577 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1399526026, now seen corresponding path program 14 times [2021-06-05 15:59:34,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:34,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080526965] [2021-06-05 15:59:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:34,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080526965] [2021-06-05 15:59:34,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080526965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431097602] [2021-06-05 15:59:34,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:34,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:59:34,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:34,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:59:34,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:34,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 15:59:34,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:34,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 15:59:34,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:59:34,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:59:34,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 15:59:34,931 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-06-05 15:59:37,429 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-06-05 15:59:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:59:37,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431097602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:37,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:37,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 15:59:37,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990949911] [2021-06-05 15:59:37,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:59:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:59:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:59:37,439 INFO L87 Difference]: Start difference. First operand 101 states and 292 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:37,586 INFO L93 Difference]: Finished difference Result 230 states and 668 transitions. [2021-06-05 15:59:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:59:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 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 22 [2021-06-05 15:59:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:37,588 INFO L225 Difference]: With dead ends: 230 [2021-06-05 15:59:37,588 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 15:59:37,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2644.2ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:59:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 15:59:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 149. [2021-06-05 15:59:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.324324324324324) internal successors, (492), 148 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 492 transitions. [2021-06-05 15:59:37,591 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 492 transitions. Word has length 22 [2021-06-05 15:59:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:37,591 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 492 transitions. [2021-06-05 15:59:37,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 492 transitions. [2021-06-05 15:59:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:59:37,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:37,592 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:37,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 15:59:37,806 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1718376096, now seen corresponding path program 15 times [2021-06-05 15:59:37,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:37,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432377237] [2021-06-05 15:59:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:38,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:38,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432377237] [2021-06-05 15:59:38,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432377237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:38,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902600643] [2021-06-05 15:59:38,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:38,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:59:38,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:59:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:38,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902600643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:38,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:38,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 15:59:38,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810810712] [2021-06-05 15:59:38,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:59:38,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:59:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:59:38,527 INFO L87 Difference]: Start difference. First operand 149 states and 492 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:38,843 INFO L93 Difference]: Finished difference Result 197 states and 539 transitions. [2021-06-05 15:59:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:59:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:59:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:38,844 INFO L225 Difference]: With dead ends: 197 [2021-06-05 15:59:38,844 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 15:59:38,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 628.4ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:59:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 15:59:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 119. [2021-06-05 15:59:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 3.110169491525424) internal successors, (367), 118 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 367 transitions. [2021-06-05 15:59:38,847 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 367 transitions. Word has length 23 [2021-06-05 15:59:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:38,847 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 367 transitions. [2021-06-05 15:59:38,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 367 transitions. [2021-06-05 15:59:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:59:38,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:38,847 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:39,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:59:39,053 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1688884076, now seen corresponding path program 16 times [2021-06-05 15:59:39,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:39,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681201051] [2021-06-05 15:59:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:39,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:39,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681201051] [2021-06-05 15:59:39,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681201051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:39,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449266179] [2021-06-05 15:59:39,206 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 [2021-06-05 15:59:39,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:59:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:59:39,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:39,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449266179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:39,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:39,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 15:59:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778686216] [2021-06-05 15:59:39,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:59:39,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:39,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:59:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:59:39,781 INFO L87 Difference]: Start difference. First operand 119 states and 367 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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) [2021-06-05 15:59:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:40,227 INFO L93 Difference]: Finished difference Result 327 states and 811 transitions. [2021-06-05 15:59:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:59:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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 24 [2021-06-05 15:59:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:40,229 INFO L225 Difference]: With dead ends: 327 [2021-06-05 15:59:40,229 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 15:59:40,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:59:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 15:59:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 141. [2021-06-05 15:59:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.1285714285714286) internal successors, (438), 140 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 438 transitions. [2021-06-05 15:59:40,234 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 438 transitions. Word has length 24 [2021-06-05 15:59:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:40,234 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 438 transitions. [2021-06-05 15:59:40,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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) [2021-06-05 15:59:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 438 transitions. [2021-06-05 15:59:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:59:40,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:59:40,234 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:59:40,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:59:40,450 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:59:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:59:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1454689826, now seen corresponding path program 17 times [2021-06-05 15:59:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:59:40,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635824262] [2021-06-05 15:59:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:59:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:59:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:40,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:59:40,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635824262] [2021-06-05 15:59:40,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635824262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:40,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041953938] [2021-06-05 15:59:40,653 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 [2021-06-05 15:59:40,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:59:40,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:59:40,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:59:40,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:59:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:59:41,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041953938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:59:41,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:59:41,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 15:59:41,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969679324] [2021-06-05 15:59:41,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:59:41,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:59:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:59:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:59:41,208 INFO L87 Difference]: Start difference. First operand 141 states and 438 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:59:41,551 INFO L93 Difference]: Finished difference Result 137 states and 247 transitions. [2021-06-05 15:59:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:59:41,552 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-06-05 15:59:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:59:41,552 INFO L225 Difference]: With dead ends: 137 [2021-06-05 15:59:41,552 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 15:59:41,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 767.7ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:59:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 15:59:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 15:59:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 15:59:41,553 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-06-05 15:59:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:59:41,553 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 15:59:41,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:59:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 15:59:41,553 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 15:59:41,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:59:41,754 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:59:41,756 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:59:41 BasicIcfg [2021-06-05 15:59:41,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:59:41,756 INFO L168 Benchmark]: Toolchain (without parser) took 20018.72 ms. Allocated memory was 364.9 MB in the beginning and 526.4 MB in the end (delta: 161.5 MB). Free memory was 344.7 MB in the beginning and 445.3 MB in the end (delta: -100.6 MB). Peak memory consumption was 63.9 MB. Max. memory is 16.0 GB. [2021-06-05 15:59:41,756 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 364.9 MB. Free memory was 346.0 MB in the beginning and 345.9 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:59:41,757 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.55 ms. Allocated memory is still 364.9 MB. Free memory was 344.6 MB in the beginning and 343.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:59:41,757 INFO L168 Benchmark]: Boogie Preprocessor took 25.59 ms. Allocated memory is still 364.9 MB. Free memory was 343.2 MB in the beginning and 342.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:59:41,757 INFO L168 Benchmark]: RCFGBuilder took 425.54 ms. Allocated memory is still 364.9 MB. Free memory was 342.1 MB in the beginning and 339.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.0 GB. [2021-06-05 15:59:41,757 INFO L168 Benchmark]: TraceAbstraction took 19539.38 ms. Allocated memory was 364.9 MB in the beginning and 526.4 MB in the end (delta: 161.5 MB). Free memory was 338.7 MB in the beginning and 445.3 MB in the end (delta: -106.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 16.0 GB. [2021-06-05 15:59:41,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 364.9 MB. Free memory was 346.0 MB in the beginning and 345.9 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.55 ms. Allocated memory is still 364.9 MB. Free memory was 344.6 MB in the beginning and 343.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 25.59 ms. Allocated memory is still 364.9 MB. Free memory was 343.2 MB in the beginning and 342.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 425.54 ms. Allocated memory is still 364.9 MB. Free memory was 342.1 MB in the beginning and 339.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 19539.38 ms. Allocated memory was 364.9 MB in the beginning and 526.4 MB in the end (delta: 161.5 MB). Free memory was 338.7 MB in the beginning and 445.3 MB in the end (delta: -106.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 125]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 27 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19429.6ms, OverallIterations: 27, TraceHistogramMax: 7, EmptinessCheckTime: 20.8ms, AutomataDifference: 3062.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 602 SDtfs, 1005 SDslu, 4826 SDs, 0 SdLazy, 2272 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1130.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 650 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 8642.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=24, InterpolantAutomatonStates: 247, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 114.7ms AutomataMinimizationTime, 27 MinimizatonAttempts, 829 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 149.8ms SsaConstructionTime, 437.7ms SatisfiabilityAnalysisTime, 10001.2ms InterpolantComputationTime, 904 NumberOfCodeBlocks, 904 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 854 ConstructedInterpolants, 23 QuantifiedInterpolants, 9864 SizeOfPredicates, 191 NumberOfNonLiveVariables, 1161 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 50 InterpolantComputations, 4 PerfectInterpolantSequences, 169/656 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...