/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:37:44,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:37:44,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:37:44,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:37:44,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:37:44,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:37:44,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:37:44,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:37:44,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:37:44,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:37:44,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:37:44,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:37:44,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:37:44,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:37:44,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:37:44,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:37:44,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 05:37:44,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:37:44,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:37:44,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:37:44,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:37:44,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:37:44,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:37:44,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:37:44,689 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:37:44,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:37:44,689 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:37:44,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:37:44,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:37:44,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:37:44,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:37:44,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:37:44,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:37:44,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:37:44,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:37:44,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:37:44,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:37:44,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:37:44,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:37:44,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:37:44,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:37:44,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:37:44,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:37:44,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:37:44,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:37:44,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:37:44,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:37:44,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:37:44,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:37:44,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:37:44,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:37:45,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:37:45,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:37:45,009 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:37:45,011 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:37:45,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-06-05 05:37:45,026 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-06-05 05:37:45,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:37:45,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:37:45,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:37:45,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:37:45,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:37:45,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:37:45,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:37:45,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:37:45,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:37:45,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/1) ... [2021-06-05 05:37:45,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:37:45,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:37:45,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:37:45,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:37:45,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (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 05:37:45,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:37:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:37:45,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:37:45,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:37:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:37:45,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:37:45,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:37:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:37:45,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:37:45,159 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 05:37:45,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:37:45,319 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:37:45,321 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:37:45 BoogieIcfgContainer [2021-06-05 05:37:45,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:37:45,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:37:45,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:37:45,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:37:45,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:45" (1/2) ... [2021-06-05 05:37:45,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d251460 and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:37:45, skipping insertion in model container [2021-06-05 05:37:45,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:37:45" (2/2) ... [2021-06-05 05:37:45,327 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-06-05 05:37:45,332 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:37:45,332 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:37:45,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:37:45,333 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:37:45,374 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:37:45,394 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:37:45,412 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:37:45,412 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:37:45,413 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:37:45,413 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:37:45,413 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:37:45,413 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:37:45,413 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:37:45,413 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:37:45,436 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-05 05:37:45,449 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:37:45,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:45,465 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:45,466 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:45,470 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-06-05 05:37:45,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:45,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463421079] [2021-06-05 05:37:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:45,584 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 05:37:45,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:45,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463421079] [2021-06-05 05:37:45,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463421079] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:45,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:45,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:37:45,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515191879] [2021-06-05 05:37:45,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:37:45,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:45,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:37:45,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:37:45,602 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 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 05:37:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:45,637 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-05 05:37:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:37:45,638 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 05:37:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:45,646 INFO L225 Difference]: With dead ends: 43 [2021-06-05 05:37:45,646 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 05:37:45,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 05:37:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-05 05:37:45,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-05 05:37:45,675 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-05 05:37:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:45,676 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-05 05:37:45,676 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 05:37:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-05 05:37:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:37:45,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:45,677 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:45,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:37:45,677 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash 759896365, now seen corresponding path program 1 times [2021-06-05 05:37:45,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:45,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751339740] [2021-06-05 05:37:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:45,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:45,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751339740] [2021-06-05 05:37:45,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751339740] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:45,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:45,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:37:45,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55120092] [2021-06-05 05:37:45,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:37:45,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:37:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:37:45,714 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:45,733 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-05 05:37:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:37:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:37:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:45,735 INFO L225 Difference]: With dead ends: 50 [2021-06-05 05:37:45,735 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 05:37:45,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 05:37:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-05 05:37:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-05 05:37:45,742 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-05 05:37:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:45,742 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-05 05:37:45,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-05 05:37:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:45,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:45,744 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:45,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:37:45,744 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-06-05 05:37:45,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:45,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142848494] [2021-06-05 05:37:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:45,998 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 05:37:45,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:46,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142848494] [2021-06-05 05:37:46,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142848494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:46,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36242028] [2021-06-05 05:37:46,000 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 05:37:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:37:46,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:46,405 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 05:37:46,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36242028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:46,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:46,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:37:46,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750153592] [2021-06-05 05:37:46,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:37:46,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:37:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:37:46,415 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 05:37:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:46,667 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-06-05 05:37:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:37:46,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-06-05 05:37:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:46,672 INFO L225 Difference]: With dead ends: 108 [2021-06-05 05:37:46,676 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 05:37:46,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:37:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 05:37:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-06-05 05:37:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 05:37:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-06-05 05:37:46,690 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-06-05 05:37:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:46,690 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-06-05 05:37:46,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 05:37:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-06-05 05:37:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:46,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:46,691 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:46,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 05:37:46,909 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash 242654451, now seen corresponding path program 2 times [2021-06-05 05:37:46,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:46,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306989126] [2021-06-05 05:37:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:47,091 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 05:37:47,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:47,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306989126] [2021-06-05 05:37:47,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306989126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:47,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613294538] [2021-06-05 05:37:47,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:47,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:47,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:47,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:37:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:47,366 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 05:37:47,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613294538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:47,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:47,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:37:47,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892102996] [2021-06-05 05:37:47,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:37:47,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:47,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:37:47,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:37:47,368 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 05:37:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:47,687 INFO L93 Difference]: Finished difference Result 130 states and 236 transitions. [2021-06-05 05:37:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:37:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-06-05 05:37:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:47,690 INFO L225 Difference]: With dead ends: 130 [2021-06-05 05:37:47,691 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 05:37:47,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 377.4ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:37:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 05:37:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2021-06-05 05:37:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 05:37:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-06-05 05:37:47,708 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-06-05 05:37:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:47,709 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-06-05 05:37:47,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 05:37:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-06-05 05:37:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:37:47,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:47,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:47,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:47,911 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash 892723421, now seen corresponding path program 3 times [2021-06-05 05:37:47,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:47,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559037364] [2021-06-05 05:37:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:48,099 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 05:37:48,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:48,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559037364] [2021-06-05 05:37:48,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559037364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138212865] [2021-06-05 05:37:48,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:48,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:37:48,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:48,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:37:48,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:48,309 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 05:37:48,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138212865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:48,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:37:48,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35616937] [2021-06-05 05:37:48,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:37:48,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:48,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:37:48,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:37:48,311 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 05:37:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:48,520 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-06-05 05:37:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:37:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-06-05 05:37:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:48,522 INFO L225 Difference]: With dead ends: 90 [2021-06-05 05:37:48,522 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 05:37:48,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:37:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 05:37:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-06-05 05:37:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-06-05 05:37:48,526 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-06-05 05:37:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:48,526 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-06-05 05:37:48,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 05:37:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-06-05 05:37:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:48,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:48,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:48,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:48,741 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 4 times [2021-06-05 05:37:48,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:48,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353734062] [2021-06-05 05:37:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:48,995 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 05:37:48,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:48,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353734062] [2021-06-05 05:37:48,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353734062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976553381] [2021-06-05 05:37:48,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:49,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:49,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:49,298 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 05:37:49,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976553381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:49,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:49,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:49,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599207673] [2021-06-05 05:37:49,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:49,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:49,301 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:49,736 INFO L93 Difference]: Finished difference Result 117 states and 220 transitions. [2021-06-05 05:37:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:37:49,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:49,738 INFO L225 Difference]: With dead ends: 117 [2021-06-05 05:37:49,738 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 05:37:49,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:37:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 05:37:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2021-06-05 05:37:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 05:37:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-06-05 05:37:49,747 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-06-05 05:37:49,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:49,748 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-06-05 05:37:49,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-06-05 05:37:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:49,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:49,749 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:49,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:49,971 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:49,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1509256847, now seen corresponding path program 5 times [2021-06-05 05:37:49,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:49,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431037450] [2021-06-05 05:37:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:50,186 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 05:37:50,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:50,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431037450] [2021-06-05 05:37:50,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431037450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045197045] [2021-06-05 05:37:50,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:50,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:37:50,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:50,510 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 05:37:50,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045197045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:50,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:50,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:50,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112269599] [2021-06-05 05:37:50,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:50,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:50,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:50,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:50,512 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:50,937 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2021-06-05 05:37:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:37:50,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:50,942 INFO L225 Difference]: With dead ends: 133 [2021-06-05 05:37:50,942 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 05:37:50,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 519.9ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:37:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 05:37:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-06-05 05:37:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-06-05 05:37:50,947 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 21 [2021-06-05 05:37:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:50,948 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-06-05 05:37:50,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-06-05 05:37:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:50,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:50,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:51,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 05:37:51,169 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash -859187877, now seen corresponding path program 6 times [2021-06-05 05:37:51,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:51,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116509260] [2021-06-05 05:37:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:51,421 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 05:37:51,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:51,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116509260] [2021-06-05 05:37:51,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116509260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:51,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112558284] [2021-06-05 05:37:51,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:51,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:37:51,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:51,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:51,743 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 05:37:51,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112558284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:51,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:51,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:51,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174623559] [2021-06-05 05:37:51,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:51,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:51,745 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:52,192 INFO L93 Difference]: Finished difference Result 113 states and 215 transitions. [2021-06-05 05:37:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:37:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:52,193 INFO L225 Difference]: With dead ends: 113 [2021-06-05 05:37:52,193 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 05:37:52,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:37:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 05:37:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-06-05 05:37:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 05:37:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-06-05 05:37:52,197 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-06-05 05:37:52,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:52,198 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-06-05 05:37:52,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:52,198 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-06-05 05:37:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:52,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:52,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:52,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:52,401 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:52,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1888068795, now seen corresponding path program 7 times [2021-06-05 05:37:52,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:52,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523138029] [2021-06-05 05:37:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:52,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:52,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523138029] [2021-06-05 05:37:52,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523138029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:52,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225165666] [2021-06-05 05:37:52,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:52,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:52,804 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 05:37:52,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225165666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:52,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:52,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:52,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712023392] [2021-06-05 05:37:52,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:52,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:52,806 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:53,181 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2021-06-05 05:37:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:37:53,181 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:53,182 INFO L225 Difference]: With dead ends: 176 [2021-06-05 05:37:53,182 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 05:37:53,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:37:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 05:37:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 72. [2021-06-05 05:37:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-05 05:37:53,186 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 21 [2021-06-05 05:37:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:53,187 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-05 05:37:53,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-05 05:37:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:53,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:53,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:53,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:53,401 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1756829531, now seen corresponding path program 8 times [2021-06-05 05:37:53,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:53,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333282219] [2021-06-05 05:37:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:53,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:53,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333282219] [2021-06-05 05:37:53,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333282219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:53,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746221140] [2021-06-05 05:37:53,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:53,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:53,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:53,802 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 05:37:53,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746221140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:53,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:53,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:53,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615708919] [2021-06-05 05:37:53,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:53,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:53,804 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:54,232 INFO L93 Difference]: Finished difference Result 163 states and 289 transitions. [2021-06-05 05:37:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:37:54,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:54,233 INFO L225 Difference]: With dead ends: 163 [2021-06-05 05:37:54,233 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 05:37:54,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:37:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 05:37:54,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2021-06-05 05:37:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 05:37:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-06-05 05:37:54,237 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 21 [2021-06-05 05:37:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:54,237 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-06-05 05:37:54,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-06-05 05:37:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:54,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:54,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:54,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:37:54,453 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 477277963, now seen corresponding path program 9 times [2021-06-05 05:37:54,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:54,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522112754] [2021-06-05 05:37:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:54,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:54,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522112754] [2021-06-05 05:37:54,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522112754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:54,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910709567] [2021-06-05 05:37:54,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:54,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:37:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:54,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:54,783 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 05:37:54,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910709567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:54,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:54,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:54,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658774225] [2021-06-05 05:37:54,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:54,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:54,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:54,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:54,785 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:55,029 INFO L93 Difference]: Finished difference Result 104 states and 188 transitions. [2021-06-05 05:37:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:37:55,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:55,030 INFO L225 Difference]: With dead ends: 104 [2021-06-05 05:37:55,030 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 05:37:55,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:37:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 05:37:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-06-05 05:37:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 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 05:37:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-06-05 05:37:55,033 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-06-05 05:37:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:55,033 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-06-05 05:37:55,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-06-05 05:37:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:55,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:55,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:55,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:55,249 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:55,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:55,249 INFO L82 PathProgramCache]: Analyzing trace with hash -362797707, now seen corresponding path program 10 times [2021-06-05 05:37:55,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:55,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786902588] [2021-06-05 05:37:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:55,367 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 05:37:55,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786902588] [2021-06-05 05:37:55,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786902588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089620423] [2021-06-05 05:37:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:55,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:55,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:55,620 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 05:37:55,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089620423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:55,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:55,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:55,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178283654] [2021-06-05 05:37:55,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:55,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:55,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:55,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:55,622 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:56,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:56,130 INFO L93 Difference]: Finished difference Result 171 states and 307 transitions. [2021-06-05 05:37:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:37:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:56,131 INFO L225 Difference]: With dead ends: 171 [2021-06-05 05:37:56,131 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 05:37:56,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 05:37:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 77. [2021-06-05 05:37:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 05:37:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 153 transitions. [2021-06-05 05:37:56,137 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 153 transitions. Word has length 21 [2021-06-05 05:37:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:56,137 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 153 transitions. [2021-06-05 05:37:56,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 153 transitions. [2021-06-05 05:37:56,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:56,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:56,138 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:56,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:56,353 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:56,353 INFO L82 PathProgramCache]: Analyzing trace with hash 287271263, now seen corresponding path program 11 times [2021-06-05 05:37:56,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:56,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015255711] [2021-06-05 05:37:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:56,486 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 05:37:56,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:56,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015255711] [2021-06-05 05:37:56,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015255711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:56,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904257242] [2021-06-05 05:37:56,486 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 05:37:56,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:37:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:56,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:56,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:56,737 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 05:37:56,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904257242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:56,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:56,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:56,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579163259] [2021-06-05 05:37:56,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:56,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:56,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:56,739 INFO L87 Difference]: Start difference. First operand 77 states and 153 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:57,313 INFO L93 Difference]: Finished difference Result 171 states and 303 transitions. [2021-06-05 05:37:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:37:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:57,314 INFO L225 Difference]: With dead ends: 171 [2021-06-05 05:37:57,314 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 05:37:57,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:37:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 05:37:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2021-06-05 05:37:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-06-05 05:37:57,318 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 21 [2021-06-05 05:37:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:57,318 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-06-05 05:37:57,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-06-05 05:37:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:57,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:57,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:57,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 05:37:57,519 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1773588539, now seen corresponding path program 12 times [2021-06-05 05:37:57,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:57,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755473109] [2021-06-05 05:37:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:57,653 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 05:37:57,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:57,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755473109] [2021-06-05 05:37:57,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755473109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:57,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240241453] [2021-06-05 05:37:57,654 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 05:37:57,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:37:57,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:57,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:57,909 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 05:37:57,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240241453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:57,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:57,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:57,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108492835] [2021-06-05 05:37:57,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:57,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:57,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:57,910 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:58,366 INFO L93 Difference]: Finished difference Result 139 states and 248 transitions. [2021-06-05 05:37:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:37:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:58,368 INFO L225 Difference]: With dead ends: 139 [2021-06-05 05:37:58,368 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 05:37:58,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:37:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 05:37:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2021-06-05 05:37:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 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 05:37:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-06-05 05:37:58,371 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-06-05 05:37:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:58,371 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-06-05 05:37:58,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-06-05 05:37:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:37:58,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:58,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:58,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:37:58,581 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:58,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 13 times [2021-06-05 05:37:58,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:58,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790186845] [2021-06-05 05:37:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:58,688 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 05:37:58,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:58,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790186845] [2021-06-05 05:37:58,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790186845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:58,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452470094] [2021-06-05 05:37:58,689 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 05:37:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:37:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:58,909 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 05:37:58,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452470094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:58,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:58,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:37:58,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78589201] [2021-06-05 05:37:58,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:37:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:58,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:37:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:37:58,911 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:59,204 INFO L93 Difference]: Finished difference Result 124 states and 220 transitions. [2021-06-05 05:37:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:37:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:37:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:59,205 INFO L225 Difference]: With dead ends: 124 [2021-06-05 05:37:59,205 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 05:37:59,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 375.7ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:37:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 05:37:59,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-06-05 05:37:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 68 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 05:37:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 131 transitions. [2021-06-05 05:37:59,208 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 131 transitions. Word has length 21 [2021-06-05 05:37:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:59,208 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 131 transitions. [2021-06-05 05:37:59,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 05:37:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 131 transitions. [2021-06-05 05:37:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:37:59,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:59,208 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:59,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:37:59,417 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1776759271, now seen corresponding path program 14 times [2021-06-05 05:37:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:59,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734047189] [2021-06-05 05:37:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:59,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:59,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734047189] [2021-06-05 05:37:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734047189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:59,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022180496] [2021-06-05 05:37:59,603 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 05:37:59,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:59,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:59,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:37:59,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:59,901 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 05:37:59,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022180496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:59,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:59,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:37:59,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909964487] [2021-06-05 05:37:59,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:37:59,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:37:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:37:59,903 INFO L87 Difference]: Start difference. First operand 69 states and 131 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:00,190 INFO L93 Difference]: Finished difference Result 120 states and 222 transitions. [2021-06-05 05:38:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:38:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:00,191 INFO L225 Difference]: With dead ends: 120 [2021-06-05 05:38:00,191 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 05:38:00,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 518.6ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:38:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 05:38:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2021-06-05 05:38:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 05:38:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-06-05 05:38:00,194 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 23 [2021-06-05 05:38:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:00,194 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-06-05 05:38:00,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-06-05 05:38:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:00,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:00,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:00,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:00,409 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 15 times [2021-06-05 05:38:00,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:00,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091728509] [2021-06-05 05:38:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:00,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:00,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091728509] [2021-06-05 05:38:00,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091728509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:00,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677163758] [2021-06-05 05:38:00,548 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 05:38:00,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:38:00,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:00,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:38:00,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:00,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677163758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:00,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:00,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:00,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105356638] [2021-06-05 05:38:00,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:00,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:00,891 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:01,855 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-06-05 05:38:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:38:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:01,857 INFO L225 Difference]: With dead ends: 225 [2021-06-05 05:38:01,857 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 05:38:01,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 987.4ms TimeCoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:38:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 05:38:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-06-05 05:38:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-06-05 05:38:01,861 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-06-05 05:38:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:01,861 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-06-05 05:38:01,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-06-05 05:38:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:01,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:01,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:02,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:38:02,069 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash 380430255, now seen corresponding path program 16 times [2021-06-05 05:38:02,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:02,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249094448] [2021-06-05 05:38:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:02,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:02,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249094448] [2021-06-05 05:38:02,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249094448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:02,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086655261] [2021-06-05 05:38:02,302 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 05:38:02,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:02,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:02,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:38:02,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:02,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086655261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:02,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:02,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:02,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745946423] [2021-06-05 05:38:02,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:02,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:02,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:02,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:02,567 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:04,011 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-06-05 05:38:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:38:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:04,013 INFO L225 Difference]: With dead ends: 293 [2021-06-05 05:38:04,013 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 05:38:04,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1379.7ms TimeCoverageRelationStatistics Valid=557, Invalid=3225, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:38:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 05:38:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-06-05 05:38:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 05:38:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 05:38:04,018 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-06-05 05:38:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:04,019 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 05:38:04,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 05:38:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:04,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:04,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:04,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:38:04,225 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash -884497605, now seen corresponding path program 17 times [2021-06-05 05:38:04,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:04,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546624548] [2021-06-05 05:38:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:04,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:04,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546624548] [2021-06-05 05:38:04,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546624548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:04,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347386202] [2021-06-05 05:38:04,458 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 05:38:04,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:38:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:04,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:38:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:04,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347386202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:04,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:04,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448042837] [2021-06-05 05:38:04,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:04,731 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:05,949 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-06-05 05:38:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:38:05,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:05,950 INFO L225 Difference]: With dead ends: 263 [2021-06-05 05:38:05,950 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 05:38:05,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1233.1ms TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:38:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 05:38:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-06-05 05:38:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 05:38:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 05:38:05,954 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-06-05 05:38:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:05,955 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 05:38:05,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 05:38:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:05,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:05,955 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:06,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:06,165 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash 251687667, now seen corresponding path program 18 times [2021-06-05 05:38:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:06,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068576967] [2021-06-05 05:38:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:06,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:06,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068576967] [2021-06-05 05:38:06,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068576967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:06,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724365587] [2021-06-05 05:38:06,310 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 05:38:06,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:38:06,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:06,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:38:06,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:06,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724365587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:06,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:06,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:06,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241645682] [2021-06-05 05:38:06,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:06,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:06,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:06,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:06,570 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:07,869 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-06-05 05:38:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:38:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:07,871 INFO L225 Difference]: With dead ends: 280 [2021-06-05 05:38:07,871 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 05:38:07,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1145.1ms TimeCoverageRelationStatistics Valid=546, Invalid=2876, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:38:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 05:38:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-06-05 05:38:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 05:38:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-06-05 05:38:07,876 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-06-05 05:38:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:07,876 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-06-05 05:38:07,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-06-05 05:38:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:07,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:07,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:08,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:08,093 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash 901756637, now seen corresponding path program 19 times [2021-06-05 05:38:08,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:08,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193098466] [2021-06-05 05:38:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:08,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:08,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193098466] [2021-06-05 05:38:08,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193098466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:08,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823826140] [2021-06-05 05:38:08,251 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 05:38:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:08,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:38:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:08,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823826140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:08,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:08,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:08,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458208050] [2021-06-05 05:38:08,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:08,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:08,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:08,473 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:09,623 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-06-05 05:38:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:38:09,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:09,625 INFO L225 Difference]: With dead ends: 241 [2021-06-05 05:38:09,625 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 05:38:09,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1080.9ms TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:38:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 05:38:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-06-05 05:38:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 05:38:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-06-05 05:38:09,629 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-06-05 05:38:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:09,629 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-06-05 05:38:09,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:09,630 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-06-05 05:38:09,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:09,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:09,631 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:09,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:09,837 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:09,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1035227257, now seen corresponding path program 20 times [2021-06-05 05:38:09,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:09,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356551526] [2021-06-05 05:38:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:10,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:10,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356551526] [2021-06-05 05:38:10,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356551526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:10,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093751299] [2021-06-05 05:38:10,053 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 05:38:10,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:10,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:10,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:38:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:10,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093751299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:10,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:10,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:10,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25359281] [2021-06-05 05:38:10,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:10,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:10,329 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:11,927 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-06-05 05:38:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:38:11,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:11,929 INFO L225 Difference]: With dead ends: 342 [2021-06-05 05:38:11,929 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 05:38:11,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1548.5ms TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:38:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 05:38:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-06-05 05:38:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 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 05:38:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-06-05 05:38:11,935 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-06-05 05:38:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:11,935 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-06-05 05:38:11,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-06-05 05:38:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:11,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:11,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:12,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:38:12,149 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:12,149 INFO L82 PathProgramCache]: Analyzing trace with hash -229700603, now seen corresponding path program 21 times [2021-06-05 05:38:12,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:12,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232446971] [2021-06-05 05:38:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:12,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:12,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232446971] [2021-06-05 05:38:12,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232446971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:12,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864871362] [2021-06-05 05:38:12,323 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 05:38:12,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:38:12,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:38:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:12,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864871362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:12,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:12,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:12,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652487807] [2021-06-05 05:38:12,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:12,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:12,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:12,642 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:14,269 INFO L93 Difference]: Finished difference Result 335 states and 651 transitions. [2021-06-05 05:38:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:38:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:14,271 INFO L225 Difference]: With dead ends: 335 [2021-06-05 05:38:14,271 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 05:38:14,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1485.2ms TimeCoverageRelationStatistics Valid=546, Invalid=2994, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:38:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 05:38:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 154. [2021-06-05 05:38:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.261437908496732) internal successors, (346), 153 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 05:38:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 346 transitions. [2021-06-05 05:38:14,276 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 346 transitions. Word has length 23 [2021-06-05 05:38:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:14,277 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 346 transitions. [2021-06-05 05:38:14,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 346 transitions. [2021-06-05 05:38:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:14,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:14,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:14,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:38:14,497 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash 906484669, now seen corresponding path program 22 times [2021-06-05 05:38:14,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:14,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745550696] [2021-06-05 05:38:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:14,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745550696] [2021-06-05 05:38:14,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745550696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598710122] [2021-06-05 05:38:14,661 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 05:38:14,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:14,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:14,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:38:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:14,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598710122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:14,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:14,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:14,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415572824] [2021-06-05 05:38:14,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:14,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:14,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:14,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:14,919 INFO L87 Difference]: Start difference. First operand 154 states and 346 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:16,311 INFO L93 Difference]: Finished difference Result 324 states and 640 transitions. [2021-06-05 05:38:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:38:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:16,312 INFO L225 Difference]: With dead ends: 324 [2021-06-05 05:38:16,312 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 05:38:16,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1361.3ms TimeCoverageRelationStatistics Valid=560, Invalid=2746, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:38:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 05:38:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 149. [2021-06-05 05:38:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.2635135135135136) internal successors, (335), 148 states have internal predecessors, (335), 0 states have call successors, (0), 0 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 05:38:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2021-06-05 05:38:16,318 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 23 [2021-06-05 05:38:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:16,318 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2021-06-05 05:38:16,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2021-06-05 05:38:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:16,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:16,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:16,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:16,541 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:16,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1644322069, now seen corresponding path program 23 times [2021-06-05 05:38:16,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:16,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307257828] [2021-06-05 05:38:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:16,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:16,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307257828] [2021-06-05 05:38:16,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307257828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:16,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194982326] [2021-06-05 05:38:16,725 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 05:38:16,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:38:16,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:38:16,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:17,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194982326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:17,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:17,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:17,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791903889] [2021-06-05 05:38:17,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:17,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:17,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:17,040 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:18,383 INFO L93 Difference]: Finished difference Result 335 states and 686 transitions. [2021-06-05 05:38:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:38:18,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:18,389 INFO L225 Difference]: With dead ends: 335 [2021-06-05 05:38:18,389 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 05:38:18,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1383.7ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:38:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 05:38:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 176. [2021-06-05 05:38:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2914285714285714) internal successors, (401), 175 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 05:38:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 401 transitions. [2021-06-05 05:38:18,395 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 401 transitions. Word has length 23 [2021-06-05 05:38:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:18,395 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 401 transitions. [2021-06-05 05:38:18,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 401 transitions. [2021-06-05 05:38:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:38:18,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:18,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:18,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:38:18,609 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash -949311587, now seen corresponding path program 24 times [2021-06-05 05:38:18,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:18,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381951896] [2021-06-05 05:38:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:18,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:18,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381951896] [2021-06-05 05:38:18,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381951896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:18,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686603051] [2021-06-05 05:38:18,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:18,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:18,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:18,784 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:38:18,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:19,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686603051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:19,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:19,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 05:38:19,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928699149] [2021-06-05 05:38:19,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:38:19,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:19,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:38:19,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:38:19,002 INFO L87 Difference]: Start difference. First operand 176 states and 401 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:20,225 INFO L93 Difference]: Finished difference Result 418 states and 882 transitions. [2021-06-05 05:38:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:38:20,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 05:38:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:20,228 INFO L225 Difference]: With dead ends: 418 [2021-06-05 05:38:20,228 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 05:38:20,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1134.1ms TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:38:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 05:38:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 193. [2021-06-05 05:38:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3541666666666665) internal successors, (452), 192 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 05:38:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 452 transitions. [2021-06-05 05:38:20,234 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 452 transitions. Word has length 23 [2021-06-05 05:38:20,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:20,235 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 452 transitions. [2021-06-05 05:38:20,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:38:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 452 transitions. [2021-06-05 05:38:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:20,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:20,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:20,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:20,441 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:20,441 INFO L82 PathProgramCache]: Analyzing trace with hash 45870327, now seen corresponding path program 25 times [2021-06-05 05:38:20,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:20,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500352050] [2021-06-05 05:38:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:20,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500352050] [2021-06-05 05:38:20,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500352050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:20,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698090782] [2021-06-05 05:38:20,568 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:20,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:20,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698090782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:20,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:20,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 05:38:20,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684673365] [2021-06-05 05:38:20,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:38:20,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:20,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:38:20,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:38:20,826 INFO L87 Difference]: Start difference. First operand 193 states and 452 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:21,671 INFO L93 Difference]: Finished difference Result 441 states and 930 transitions. [2021-06-05 05:38:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:38:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:21,673 INFO L225 Difference]: With dead ends: 441 [2021-06-05 05:38:21,673 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 05:38:21,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 798.2ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:38:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 05:38:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 228. [2021-06-05 05:38:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 05:38:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-06-05 05:38:21,680 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-06-05 05:38:21,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:21,680 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-06-05 05:38:21,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-06-05 05:38:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:21,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:21,681 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:21,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:38:21,893 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:21,893 INFO L82 PathProgramCache]: Analyzing trace with hash 695939297, now seen corresponding path program 26 times [2021-06-05 05:38:21,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:21,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938958513] [2021-06-05 05:38:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:22,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:22,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938958513] [2021-06-05 05:38:22,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938958513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:22,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771215928] [2021-06-05 05:38:22,051 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:22,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:22,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:22,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:22,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771215928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:22,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:22,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 05:38:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150100348] [2021-06-05 05:38:22,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:38:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:38:22,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:38:22,350 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:23,405 INFO L93 Difference]: Finished difference Result 450 states and 937 transitions. [2021-06-05 05:38:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:38:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:23,407 INFO L225 Difference]: With dead ends: 450 [2021-06-05 05:38:23,407 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 05:38:23,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1030.3ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:38:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 05:38:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 228. [2021-06-05 05:38:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 05:38:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-06-05 05:38:23,415 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-06-05 05:38:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:23,415 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-06-05 05:38:23,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-06-05 05:38:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:23,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:23,416 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:23,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:23,636 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1364920505, now seen corresponding path program 27 times [2021-06-05 05:38:23,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:23,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740472533] [2021-06-05 05:38:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:23,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:23,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740472533] [2021-06-05 05:38:23,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740472533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:23,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697609311] [2021-06-05 05:38:23,776 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:23,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:38:23,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:23,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:24,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697609311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:24,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:24,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 05:38:24,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133985092] [2021-06-05 05:38:24,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:38:24,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:38:24,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:38:24,059 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:24,878 INFO L93 Difference]: Finished difference Result 320 states and 692 transitions. [2021-06-05 05:38:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:38:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:24,879 INFO L225 Difference]: With dead ends: 320 [2021-06-05 05:38:24,879 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 05:38:24,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 789.1ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:38:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 05:38:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 230. [2021-06-05 05:38:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.4017467248908297) internal successors, (550), 229 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 05:38:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 550 transitions. [2021-06-05 05:38:24,885 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 550 transitions. Word has length 25 [2021-06-05 05:38:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:24,886 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 550 transitions. [2021-06-05 05:38:24,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 550 transitions. [2021-06-05 05:38:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:24,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:24,886 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:25,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:38:25,097 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash 740880809, now seen corresponding path program 28 times [2021-06-05 05:38:25,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:25,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225698521] [2021-06-05 05:38:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:25,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:25,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225698521] [2021-06-05 05:38:25,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225698521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:25,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259519158] [2021-06-05 05:38:25,229 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:25,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:25,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:25,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:25,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:25,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259519158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:25,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:25,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:25,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430695663] [2021-06-05 05:38:25,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:25,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:25,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:25,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:25,479 INFO L87 Difference]: Start difference. First operand 230 states and 550 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:26,827 INFO L93 Difference]: Finished difference Result 676 states and 1412 transitions. [2021-06-05 05:38:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:38:26,828 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:26,831 INFO L225 Difference]: With dead ends: 676 [2021-06-05 05:38:26,832 INFO L226 Difference]: Without dead ends: 635 [2021-06-05 05:38:26,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1125.2ms TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:38:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-05 05:38:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 344. [2021-06-05 05:38:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.498542274052478) internal successors, (857), 343 states have internal predecessors, (857), 0 states have call successors, (0), 0 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 05:38:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 857 transitions. [2021-06-05 05:38:26,841 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 857 transitions. Word has length 25 [2021-06-05 05:38:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:26,841 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 857 transitions. [2021-06-05 05:38:26,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 857 transitions. [2021-06-05 05:38:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:26,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:26,843 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:27,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:27,065 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1390949779, now seen corresponding path program 29 times [2021-06-05 05:38:27,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:27,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593188345] [2021-06-05 05:38:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:27,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:27,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593188345] [2021-06-05 05:38:27,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593188345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:27,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988171051] [2021-06-05 05:38:27,197 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:27,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:38:27,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:27,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:27,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988171051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:27,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:27,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:27,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733854530] [2021-06-05 05:38:27,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:27,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:27,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:27,472 INFO L87 Difference]: Start difference. First operand 344 states and 857 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:28,920 INFO L93 Difference]: Finished difference Result 642 states and 1345 transitions. [2021-06-05 05:38:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:38:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:28,922 INFO L225 Difference]: With dead ends: 642 [2021-06-05 05:38:28,922 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 05:38:28,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1234.5ms TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:38:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 05:38:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 305. [2021-06-05 05:38:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.4309210526315788) internal successors, (739), 304 states have internal predecessors, (739), 0 states have call successors, (0), 0 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 05:38:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 739 transitions. [2021-06-05 05:38:28,930 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 739 transitions. Word has length 25 [2021-06-05 05:38:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:28,930 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 739 transitions. [2021-06-05 05:38:28,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 739 transitions. [2021-06-05 05:38:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:28,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:28,931 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:29,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:38:29,147 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash -669910023, now seen corresponding path program 30 times [2021-06-05 05:38:29,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:29,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2494594] [2021-06-05 05:38:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:29,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:29,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2494594] [2021-06-05 05:38:29,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2494594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:29,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233855134] [2021-06-05 05:38:29,259 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:29,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:38:29,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:29,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:29,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233855134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:29,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:29,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:29,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685717090] [2021-06-05 05:38:29,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:29,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:29,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:29,528 INFO L87 Difference]: Start difference. First operand 305 states and 739 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:30,367 INFO L93 Difference]: Finished difference Result 433 states and 956 transitions. [2021-06-05 05:38:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:38:30,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:30,369 INFO L225 Difference]: With dead ends: 433 [2021-06-05 05:38:30,369 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 05:38:30,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 776.0ms TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:38:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 05:38:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-06-05 05:38:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.4372881355932203) internal successors, (719), 295 states have internal predecessors, (719), 0 states have call successors, (0), 0 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 05:38:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 719 transitions. [2021-06-05 05:38:30,375 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 719 transitions. Word has length 25 [2021-06-05 05:38:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:30,375 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 719 transitions. [2021-06-05 05:38:30,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 719 transitions. [2021-06-05 05:38:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:30,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:30,376 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:30,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:30,598 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash -271811723, now seen corresponding path program 31 times [2021-06-05 05:38:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:30,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863050776] [2021-06-05 05:38:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:30,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:30,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863050776] [2021-06-05 05:38:30,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863050776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:30,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747198598] [2021-06-05 05:38:30,715 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:30,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:30,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747198598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:30,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:30,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:30,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250044308] [2021-06-05 05:38:30,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:30,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:30,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:30,977 INFO L87 Difference]: Start difference. First operand 296 states and 719 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:32,483 INFO L93 Difference]: Finished difference Result 836 states and 1776 transitions. [2021-06-05 05:38:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:38:32,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:32,486 INFO L225 Difference]: With dead ends: 836 [2021-06-05 05:38:32,486 INFO L226 Difference]: Without dead ends: 792 [2021-06-05 05:38:32,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1391.0ms TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:38:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-05 05:38:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 410. [2021-06-05 05:38:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.5623471882640585) internal successors, (1048), 409 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 05:38:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1048 transitions. [2021-06-05 05:38:32,497 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1048 transitions. Word has length 25 [2021-06-05 05:38:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:32,497 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1048 transitions. [2021-06-05 05:38:32,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1048 transitions. [2021-06-05 05:38:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:32,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:32,499 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:32,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:38:32,713 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash 378257247, now seen corresponding path program 32 times [2021-06-05 05:38:32,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:32,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733838274] [2021-06-05 05:38:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:32,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:32,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733838274] [2021-06-05 05:38:32,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733838274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:32,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529977597] [2021-06-05 05:38:32,836 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:32,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:32,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:33,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529977597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:33,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:33,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:33,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551196085] [2021-06-05 05:38:33,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:33,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:33,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:33,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:33,087 INFO L87 Difference]: Start difference. First operand 410 states and 1048 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:34,759 INFO L93 Difference]: Finished difference Result 801 states and 1700 transitions. [2021-06-05 05:38:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:38:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:34,761 INFO L225 Difference]: With dead ends: 801 [2021-06-05 05:38:34,761 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 05:38:34,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1527.2ms TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:38:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 05:38:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 300. [2021-06-05 05:38:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.5050167224080266) internal successors, (749), 299 states have internal predecessors, (749), 0 states have call successors, (0), 0 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 05:38:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 749 transitions. [2021-06-05 05:38:34,769 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 749 transitions. Word has length 25 [2021-06-05 05:38:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:34,769 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 749 transitions. [2021-06-05 05:38:34,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 749 transitions. [2021-06-05 05:38:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:34,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:34,770 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:34,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:38:34,985 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:34,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1682602555, now seen corresponding path program 33 times [2021-06-05 05:38:34,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:34,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555684027] [2021-06-05 05:38:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:35,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555684027] [2021-06-05 05:38:35,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555684027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886308954] [2021-06-05 05:38:35,090 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:35,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:38:35,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:35,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:35,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886308954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:35,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:35,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:35,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183103967] [2021-06-05 05:38:35,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:35,355 INFO L87 Difference]: Start difference. First operand 300 states and 749 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:36,521 INFO L93 Difference]: Finished difference Result 499 states and 1080 transitions. [2021-06-05 05:38:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:38:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:36,523 INFO L225 Difference]: With dead ends: 499 [2021-06-05 05:38:36,523 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 05:38:36,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1076.7ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:38:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 05:38:36,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2021-06-05 05:38:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.5187713310580206) internal successors, (738), 293 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 05:38:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 738 transitions. [2021-06-05 05:38:36,529 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 738 transitions. Word has length 25 [2021-06-05 05:38:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:36,529 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 738 transitions. [2021-06-05 05:38:36,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 738 transitions. [2021-06-05 05:38:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:36,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:36,530 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:36,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:38:36,752 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:36,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:36,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 34 times [2021-06-05 05:38:36,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:36,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589852899] [2021-06-05 05:38:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:36,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589852899] [2021-06-05 05:38:36,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589852899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441201487] [2021-06-05 05:38:36,871 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:36,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:36,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:36,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:36,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441201487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:37,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:37,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713678215] [2021-06-05 05:38:37,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:37,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:37,151 INFO L87 Difference]: Start difference. First operand 294 states and 738 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:38,005 INFO L93 Difference]: Finished difference Result 435 states and 957 transitions. [2021-06-05 05:38:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:38:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:38,007 INFO L225 Difference]: With dead ends: 435 [2021-06-05 05:38:38,007 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 05:38:38,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 820.3ms TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:38:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 05:38:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 286. [2021-06-05 05:38:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.389473684210526) internal successors, (681), 285 states have internal predecessors, (681), 0 states have call successors, (0), 0 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 05:38:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 681 transitions. [2021-06-05 05:38:38,011 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 681 transitions. Word has length 25 [2021-06-05 05:38:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:38,011 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 681 transitions. [2021-06-05 05:38:38,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 681 transitions. [2021-06-05 05:38:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:38,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:38,012 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:38,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:38:38,217 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2090603063, now seen corresponding path program 35 times [2021-06-05 05:38:38,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:38,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310347115] [2021-06-05 05:38:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:38,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:38,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310347115] [2021-06-05 05:38:38,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310347115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:38,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505652556] [2021-06-05 05:38:38,374 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:38,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:38:38,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:38,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:38,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505652556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:38,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:38,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:38,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958705297] [2021-06-05 05:38:38,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:38,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:38,691 INFO L87 Difference]: Start difference. First operand 286 states and 681 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:39,797 INFO L93 Difference]: Finished difference Result 526 states and 1119 transitions. [2021-06-05 05:38:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:38:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:39,798 INFO L225 Difference]: With dead ends: 526 [2021-06-05 05:38:39,798 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 05:38:39,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1052.3ms TimeCoverageRelationStatistics Valid=403, Invalid=2789, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:38:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 05:38:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-06-05 05:38:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.3015384615384615) internal successors, (748), 325 states have internal predecessors, (748), 0 states have call successors, (0), 0 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 05:38:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 748 transitions. [2021-06-05 05:38:39,805 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 748 transitions. Word has length 25 [2021-06-05 05:38:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:39,805 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 748 transitions. [2021-06-05 05:38:39,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 748 transitions. [2021-06-05 05:38:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:39,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:39,806 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:40,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:40,028 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:40,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:40,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1554295263, now seen corresponding path program 36 times [2021-06-05 05:38:40,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:40,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031002560] [2021-06-05 05:38:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:40,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:40,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031002560] [2021-06-05 05:38:40,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031002560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:40,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2335792] [2021-06-05 05:38:40,151 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:40,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:38:40,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:40,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:40,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:40,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2335792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:40,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:40,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:40,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644986155] [2021-06-05 05:38:40,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:40,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:40,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:40,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:40,409 INFO L87 Difference]: Start difference. First operand 326 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:41,374 INFO L93 Difference]: Finished difference Result 471 states and 986 transitions. [2021-06-05 05:38:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:38:41,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:41,375 INFO L225 Difference]: With dead ends: 471 [2021-06-05 05:38:41,375 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 05:38:41,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 968.3ms TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:38:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 05:38:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 285. [2021-06-05 05:38:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.3204225352112675) internal successors, (659), 284 states have internal predecessors, (659), 0 states have call successors, (0), 0 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 05:38:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 659 transitions. [2021-06-05 05:38:41,380 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 659 transitions. Word has length 25 [2021-06-05 05:38:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:41,380 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 659 transitions. [2021-06-05 05:38:41,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 659 transitions. [2021-06-05 05:38:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:41,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:41,381 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:41,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 05:38:41,602 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:41,603 INFO L82 PathProgramCache]: Analyzing trace with hash 679812231, now seen corresponding path program 37 times [2021-06-05 05:38:41,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:41,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353437385] [2021-06-05 05:38:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:41,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353437385] [2021-06-05 05:38:41,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353437385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969216908] [2021-06-05 05:38:41,719 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:41,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:41,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969216908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:41,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:41,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:41,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982906507] [2021-06-05 05:38:41,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:41,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:41,969 INFO L87 Difference]: Start difference. First operand 285 states and 659 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:42,625 INFO L93 Difference]: Finished difference Result 371 states and 801 transitions. [2021-06-05 05:38:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:38:42,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:42,627 INFO L225 Difference]: With dead ends: 371 [2021-06-05 05:38:42,627 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 05:38:42,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 668.4ms TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:38:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 05:38:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 289. [2021-06-05 05:38:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3194444444444446) internal successors, (668), 288 states have internal predecessors, (668), 0 states have call successors, (0), 0 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 05:38:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 668 transitions. [2021-06-05 05:38:42,630 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 668 transitions. Word has length 25 [2021-06-05 05:38:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:42,630 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 668 transitions. [2021-06-05 05:38:42,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 668 transitions. [2021-06-05 05:38:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:42,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:42,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:42,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 05:38:42,839 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash -332880301, now seen corresponding path program 38 times [2021-06-05 05:38:42,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:42,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358413591] [2021-06-05 05:38:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:42,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:42,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358413591] [2021-06-05 05:38:42,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358413591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:42,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055079942] [2021-06-05 05:38:42,954 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:42,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:42,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:42,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:43,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055079942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:43,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:43,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:43,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129054733] [2021-06-05 05:38:43,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:43,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:43,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:43,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:43,247 INFO L87 Difference]: Start difference. First operand 289 states and 668 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:44,203 INFO L93 Difference]: Finished difference Result 434 states and 912 transitions. [2021-06-05 05:38:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:38:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:44,204 INFO L225 Difference]: With dead ends: 434 [2021-06-05 05:38:44,204 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 05:38:44,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 966.3ms TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:38:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 05:38:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 289. [2021-06-05 05:38:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3229166666666665) internal successors, (669), 288 states have internal predecessors, (669), 0 states have call successors, (0), 0 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 05:38:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 669 transitions. [2021-06-05 05:38:44,210 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 669 transitions. Word has length 25 [2021-06-05 05:38:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:44,210 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 669 transitions. [2021-06-05 05:38:44,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 669 transitions. [2021-06-05 05:38:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:44,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:44,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:44,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:44,425 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:44,425 INFO L82 PathProgramCache]: Analyzing trace with hash -868110103, now seen corresponding path program 39 times [2021-06-05 05:38:44,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:44,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407361109] [2021-06-05 05:38:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:44,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407361109] [2021-06-05 05:38:44,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407361109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140732091] [2021-06-05 05:38:44,538 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:44,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:38:44,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:44,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:44,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:44,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140732091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:44,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:44,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:38:44,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534244177] [2021-06-05 05:38:44,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:44,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:44,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:44,814 INFO L87 Difference]: Start difference. First operand 289 states and 669 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:45,491 INFO L93 Difference]: Finished difference Result 408 states and 870 transitions. [2021-06-05 05:38:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:38:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:38:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:45,492 INFO L225 Difference]: With dead ends: 408 [2021-06-05 05:38:45,493 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 05:38:45,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 716.6ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:38:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 05:38:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 281. [2021-06-05 05:38:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.307142857142857) internal successors, (646), 280 states have internal predecessors, (646), 0 states have call successors, (0), 0 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 05:38:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 646 transitions. [2021-06-05 05:38:45,497 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 646 transitions. Word has length 25 [2021-06-05 05:38:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:45,497 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 646 transitions. [2021-06-05 05:38:45,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 05:38:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 646 transitions. [2021-06-05 05:38:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:45,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:45,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:45,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 05:38:45,719 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1839386049, now seen corresponding path program 40 times [2021-06-05 05:38:45,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:45,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605211610] [2021-06-05 05:38:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:45,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:45,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605211610] [2021-06-05 05:38:45,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605211610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:45,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973216767] [2021-06-05 05:38:45,958 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:45,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:45,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:45,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:45,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:46,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973216767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:46,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:46,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:38:46,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046851873] [2021-06-05 05:38:46,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:46,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:46,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:46,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:46,344 INFO L87 Difference]: Start difference. First operand 281 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 05:38:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:48,640 INFO L93 Difference]: Finished difference Result 487 states and 1044 transitions. [2021-06-05 05:38:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:38:48,640 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 05:38:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:48,641 INFO L225 Difference]: With dead ends: 487 [2021-06-05 05:38:48,641 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 05:38:48,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2266.4ms TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:38:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 05:38:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 299. [2021-06-05 05:38:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.291946308724832) internal successors, (683), 298 states have internal predecessors, (683), 0 states have call successors, (0), 0 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 05:38:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 683 transitions. [2021-06-05 05:38:48,645 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 683 transitions. Word has length 25 [2021-06-05 05:38:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:48,645 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 683 transitions. [2021-06-05 05:38:48,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 05:38:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 683 transitions. [2021-06-05 05:38:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:38:48,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:48,646 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:48,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:48,847 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1319395975, now seen corresponding path program 41 times [2021-06-05 05:38:48,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:48,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30582654] [2021-06-05 05:38:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:49,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:49,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30582654] [2021-06-05 05:38:49,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30582654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:49,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948680416] [2021-06-05 05:38:49,069 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:49,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:38:49,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:49,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:38:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:49,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948680416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:49,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:49,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:38:49,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482593261] [2021-06-05 05:38:49,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:38:49,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:38:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:38:49,413 INFO L87 Difference]: Start difference. First operand 299 states and 683 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 05:38:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:51,874 INFO L93 Difference]: Finished difference Result 516 states and 1115 transitions. [2021-06-05 05:38:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:38:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 05:38:51,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:51,876 INFO L225 Difference]: With dead ends: 516 [2021-06-05 05:38:51,876 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 05:38:51,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2441.3ms TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:38:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 05:38:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 301. [2021-06-05 05:38:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3) internal successors, (690), 300 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 05:38:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 690 transitions. [2021-06-05 05:38:51,882 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 690 transitions. Word has length 25 [2021-06-05 05:38:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:51,882 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 690 transitions. [2021-06-05 05:38:51,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 05:38:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 690 transitions. [2021-06-05 05:38:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:38:51,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:51,883 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:52,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 05:38:52,097 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 42 times [2021-06-05 05:38:52,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:52,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365022304] [2021-06-05 05:38:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:52,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:52,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365022304] [2021-06-05 05:38:52,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365022304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:52,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174918714] [2021-06-05 05:38:52,295 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:52,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:52,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:52,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:38:52,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:52,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174918714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:52,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:52,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 05:38:52,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958846509] [2021-06-05 05:38:52,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:38:52,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:38:52,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:38:52,650 INFO L87 Difference]: Start difference. First operand 301 states and 690 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:53,810 INFO L93 Difference]: Finished difference Result 558 states and 1181 transitions. [2021-06-05 05:38:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:38:53,811 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:38:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:53,812 INFO L225 Difference]: With dead ends: 558 [2021-06-05 05:38:53,812 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 05:38:53,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1300.7ms TimeCoverageRelationStatistics Valid=566, Invalid=3724, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:38:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 05:38:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 367. [2021-06-05 05:38:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.3524590163934427) internal successors, (861), 366 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 05:38:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 861 transitions. [2021-06-05 05:38:53,818 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 861 transitions. Word has length 27 [2021-06-05 05:38:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:53,818 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 861 transitions. [2021-06-05 05:38:53,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 861 transitions. [2021-06-05 05:38:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:38:53,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:53,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:54,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:54,023 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1087323029, now seen corresponding path program 43 times [2021-06-05 05:38:54,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:54,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748288782] [2021-06-05 05:38:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:54,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:54,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748288782] [2021-06-05 05:38:54,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748288782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:54,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803558149] [2021-06-05 05:38:54,212 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:54,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:38:54,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:54,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803558149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:54,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:54,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:38:54,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186156547] [2021-06-05 05:38:54,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:38:54,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:54,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:38:54,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:38:54,527 INFO L87 Difference]: Start difference. First operand 367 states and 861 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:55,878 INFO L93 Difference]: Finished difference Result 582 states and 1226 transitions. [2021-06-05 05:38:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:38:55,879 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:38:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:55,881 INFO L225 Difference]: With dead ends: 582 [2021-06-05 05:38:55,881 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 05:38:55,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1337.3ms TimeCoverageRelationStatistics Valid=636, Invalid=4194, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:38:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 05:38:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 370. [2021-06-05 05:38:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.3495934959349594) internal successors, (867), 369 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 05:38:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 867 transitions. [2021-06-05 05:38:55,887 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 867 transitions. Word has length 27 [2021-06-05 05:38:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:55,887 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 867 transitions. [2021-06-05 05:38:55,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 867 transitions. [2021-06-05 05:38:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:38:55,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:55,888 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:56,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:38:56,110 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:56,110 INFO L82 PathProgramCache]: Analyzing trace with hash -254898513, now seen corresponding path program 44 times [2021-06-05 05:38:56,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:56,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677714816] [2021-06-05 05:38:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:56,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677714816] [2021-06-05 05:38:56,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677714816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634782458] [2021-06-05 05:38:56,330 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:56,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:56,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:56,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:38:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:56,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634782458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:56,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:56,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:38:56,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152420928] [2021-06-05 05:38:56,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:38:56,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:56,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:38:56,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:38:56,643 INFO L87 Difference]: Start difference. First operand 370 states and 867 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:58,261 INFO L93 Difference]: Finished difference Result 675 states and 1384 transitions. [2021-06-05 05:38:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:38:58,261 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:38:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:58,263 INFO L225 Difference]: With dead ends: 675 [2021-06-05 05:38:58,263 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 05:38:58,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1530.6ms TimeCoverageRelationStatistics Valid=733, Invalid=4817, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:38:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 05:38:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 376. [2021-06-05 05:38:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.3573333333333335) internal successors, (884), 375 states have internal predecessors, (884), 0 states have call successors, (0), 0 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 05:38:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 884 transitions. [2021-06-05 05:38:58,268 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 884 transitions. Word has length 27 [2021-06-05 05:38:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:58,268 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 884 transitions. [2021-06-05 05:38:58,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:38:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 884 transitions. [2021-06-05 05:38:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:38:58,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:58,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:58,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:38:58,469 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1519826373, now seen corresponding path program 45 times [2021-06-05 05:38:58,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:58,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740202047] [2021-06-05 05:38:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:58,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:58,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740202047] [2021-06-05 05:38:58,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740202047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:58,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832216918] [2021-06-05 05:38:58,676 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:58,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:38:58,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:58,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:38:58,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832216918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:59,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:59,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:38:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423268876] [2021-06-05 05:38:59,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:38:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:38:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:38:59,082 INFO L87 Difference]: Start difference. First operand 376 states and 884 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:00,773 INFO L93 Difference]: Finished difference Result 647 states and 1333 transitions. [2021-06-05 05:39:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:39:00,774 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:00,776 INFO L225 Difference]: With dead ends: 647 [2021-06-05 05:39:00,776 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 05:39:00,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 1648.5ms TimeCoverageRelationStatistics Valid=718, Invalid=4684, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:39:00,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 05:39:00,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 389. [2021-06-05 05:39:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.3556701030927836) internal successors, (914), 388 states have internal predecessors, (914), 0 states have call successors, (0), 0 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 05:39:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 914 transitions. [2021-06-05 05:39:00,782 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 914 transitions. Word has length 27 [2021-06-05 05:39:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:00,782 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 914 transitions. [2021-06-05 05:39:00,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 914 transitions. [2021-06-05 05:39:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:00,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:00,783 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:00,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:00,997 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash -383641101, now seen corresponding path program 46 times [2021-06-05 05:39:00,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:00,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038617752] [2021-06-05 05:39:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:01,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:01,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038617752] [2021-06-05 05:39:01,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038617752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:01,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855395016] [2021-06-05 05:39:01,169 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:01,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:01,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:01,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855395016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:01,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:01,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:39:01,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090757316] [2021-06-05 05:39:01,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:01,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:01,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:01,461 INFO L87 Difference]: Start difference. First operand 389 states and 914 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:03,047 INFO L93 Difference]: Finished difference Result 665 states and 1367 transitions. [2021-06-05 05:39:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:39:03,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:03,049 INFO L225 Difference]: With dead ends: 665 [2021-06-05 05:39:03,050 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 05:39:03,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1398.2ms TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:39:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 05:39:03,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 390. [2021-06-05 05:39:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3573264781491003) internal successors, (917), 389 states have internal predecessors, (917), 0 states have call successors, (0), 0 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 05:39:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 917 transitions. [2021-06-05 05:39:03,055 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 917 transitions. Word has length 27 [2021-06-05 05:39:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:03,055 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 917 transitions. [2021-06-05 05:39:03,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 917 transitions. [2021-06-05 05:39:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:03,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:03,056 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:03,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:39:03,257 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash 266427869, now seen corresponding path program 47 times [2021-06-05 05:39:03,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:03,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966268358] [2021-06-05 05:39:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:03,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:03,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966268358] [2021-06-05 05:39:03,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966268358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:03,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667366479] [2021-06-05 05:39:03,439 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:03,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:39:03,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:39:03,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:03,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667366479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:03,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:03,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:39:03,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231164740] [2021-06-05 05:39:03,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:03,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:03,890 INFO L87 Difference]: Start difference. First operand 390 states and 917 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:06,202 INFO L93 Difference]: Finished difference Result 729 states and 1539 transitions. [2021-06-05 05:39:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:39:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:06,204 INFO L225 Difference]: With dead ends: 729 [2021-06-05 05:39:06,204 INFO L226 Difference]: Without dead ends: 699 [2021-06-05 05:39:06,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 2180.4ms TimeCoverageRelationStatistics Valid=949, Invalid=5857, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:39:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-05 05:39:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 414. [2021-06-05 05:39:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.358353510895884) internal successors, (974), 413 states have internal predecessors, (974), 0 states have call successors, (0), 0 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 05:39:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 974 transitions. [2021-06-05 05:39:06,211 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 974 transitions. Word has length 27 [2021-06-05 05:39:06,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:06,211 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 974 transitions. [2021-06-05 05:39:06,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 974 transitions. [2021-06-05 05:39:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:06,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:06,212 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:06,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:06,413 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash 209025461, now seen corresponding path program 48 times [2021-06-05 05:39:06,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:06,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560907796] [2021-06-05 05:39:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:06,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560907796] [2021-06-05 05:39:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560907796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739499837] [2021-06-05 05:39:06,590 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:06,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:39:06,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:06,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:06,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:06,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739499837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:06,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:06,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:39:06,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626217889] [2021-06-05 05:39:06,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:06,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:06,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:06,913 INFO L87 Difference]: Start difference. First operand 414 states and 974 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:08,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:08,948 INFO L93 Difference]: Finished difference Result 787 states and 1650 transitions. [2021-06-05 05:39:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:39:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:08,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:08,950 INFO L225 Difference]: With dead ends: 787 [2021-06-05 05:39:08,950 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 05:39:08,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 1957.7ms TimeCoverageRelationStatistics Valid=917, Invalid=5563, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:39:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 05:39:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 468. [2021-06-05 05:39:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.3618843683083512) internal successors, (1103), 467 states have internal predecessors, (1103), 0 states have call successors, (0), 0 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 05:39:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1103 transitions. [2021-06-05 05:39:08,957 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1103 transitions. Word has length 27 [2021-06-05 05:39:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:08,957 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1103 transitions. [2021-06-05 05:39:08,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1103 transitions. [2021-06-05 05:39:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:08,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:08,958 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:09,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 05:39:09,173 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:09,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:09,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1055902399, now seen corresponding path program 49 times [2021-06-05 05:39:09,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:09,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329997296] [2021-06-05 05:39:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:09,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:09,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329997296] [2021-06-05 05:39:09,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329997296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:09,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995619247] [2021-06-05 05:39:09,364 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:09,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:09,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:09,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995619247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:09,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:09,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:39:09,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108160975] [2021-06-05 05:39:09,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:09,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:09,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:09,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:09,653 INFO L87 Difference]: Start difference. First operand 468 states and 1103 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:10,928 INFO L93 Difference]: Finished difference Result 716 states and 1520 transitions. [2021-06-05 05:39:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:39:10,928 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:10,930 INFO L225 Difference]: With dead ends: 716 [2021-06-05 05:39:10,930 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 05:39:10,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1299.8ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:39:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 05:39:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 461. [2021-06-05 05:39:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.3304347826086955) internal successors, (1072), 460 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 05:39:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1072 transitions. [2021-06-05 05:39:10,936 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1072 transitions. Word has length 27 [2021-06-05 05:39:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:10,936 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1072 transitions. [2021-06-05 05:39:10,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1072 transitions. [2021-06-05 05:39:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:10,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:10,937 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:11,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:39:11,138 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:11,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1174374461, now seen corresponding path program 50 times [2021-06-05 05:39:11,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:11,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539674080] [2021-06-05 05:39:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:11,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:11,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539674080] [2021-06-05 05:39:11,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539674080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:11,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173867875] [2021-06-05 05:39:11,294 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:11,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:11,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:11,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:11,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173867875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:11,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:11,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:39:11,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922724298] [2021-06-05 05:39:11,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:11,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:11,646 INFO L87 Difference]: Start difference. First operand 461 states and 1072 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:13,217 INFO L93 Difference]: Finished difference Result 711 states and 1531 transitions. [2021-06-05 05:39:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:39:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:13,219 INFO L225 Difference]: With dead ends: 711 [2021-06-05 05:39:13,219 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 05:39:13,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1519.1ms TimeCoverageRelationStatistics Valid=712, Invalid=3710, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:39:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 05:39:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 484. [2021-06-05 05:39:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.3064182194616976) internal successors, (1114), 483 states have internal predecessors, (1114), 0 states have call successors, (0), 0 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 05:39:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1114 transitions. [2021-06-05 05:39:13,225 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1114 transitions. Word has length 27 [2021-06-05 05:39:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:13,225 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1114 transitions. [2021-06-05 05:39:13,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:13,225 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1114 transitions. [2021-06-05 05:39:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:13,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:13,226 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:13,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 05:39:13,436 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:13,436 INFO L82 PathProgramCache]: Analyzing trace with hash -52082337, now seen corresponding path program 51 times [2021-06-05 05:39:13,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:13,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413726868] [2021-06-05 05:39:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:13,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:13,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413726868] [2021-06-05 05:39:13,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413726868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:13,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376629896] [2021-06-05 05:39:13,567 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:13,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:39:13,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:13,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:13,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376629896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:13,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:13,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 05:39:13,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809240977] [2021-06-05 05:39:13,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:39:13,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:13,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:39:13,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:39:13,918 INFO L87 Difference]: Start difference. First operand 484 states and 1114 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:15,356 INFO L93 Difference]: Finished difference Result 697 states and 1499 transitions. [2021-06-05 05:39:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:39:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:15,358 INFO L225 Difference]: With dead ends: 697 [2021-06-05 05:39:15,358 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 05:39:15,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1362.7ms TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:39:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 05:39:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 448. [2021-06-05 05:39:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.250559284116331) internal successors, (1006), 447 states have internal predecessors, (1006), 0 states have call successors, (0), 0 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 05:39:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1006 transitions. [2021-06-05 05:39:15,365 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1006 transitions. Word has length 27 [2021-06-05 05:39:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:15,365 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1006 transitions. [2021-06-05 05:39:15,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1006 transitions. [2021-06-05 05:39:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:15,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:15,366 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:15,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 05:39:15,577 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2112942139, now seen corresponding path program 52 times [2021-06-05 05:39:15,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:15,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161432210] [2021-06-05 05:39:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:15,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:15,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161432210] [2021-06-05 05:39:15,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161432210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:15,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644847533] [2021-06-05 05:39:15,698 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:15,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:15,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:15,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:15,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644847533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:16,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:16,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 05:39:16,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992851653] [2021-06-05 05:39:16,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:39:16,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:16,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:39:16,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:39:16,000 INFO L87 Difference]: Start difference. First operand 448 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:16,864 INFO L93 Difference]: Finished difference Result 644 states and 1380 transitions. [2021-06-05 05:39:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:39:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:16,867 INFO L225 Difference]: With dead ends: 644 [2021-06-05 05:39:16,867 INFO L226 Difference]: Without dead ends: 630 [2021-06-05 05:39:16,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 914.7ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:39:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-05 05:39:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 493. [2021-06-05 05:39:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.252032520325203) internal successors, (1108), 492 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 05:39:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1108 transitions. [2021-06-05 05:39:16,874 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1108 transitions. Word has length 27 [2021-06-05 05:39:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:16,874 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1108 transitions. [2021-06-05 05:39:16,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1108 transitions. [2021-06-05 05:39:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:16,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:16,875 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:17,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:17,097 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1169332625, now seen corresponding path program 53 times [2021-06-05 05:39:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:17,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440752104] [2021-06-05 05:39:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:17,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:17,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440752104] [2021-06-05 05:39:17,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440752104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:17,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225592001] [2021-06-05 05:39:17,220 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:17,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:39:17,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:17,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:17,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225592001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:17,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:17,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 05:39:17,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050570899] [2021-06-05 05:39:17,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:39:17,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:17,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:39:17,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:39:17,502 INFO L87 Difference]: Start difference. First operand 493 states and 1108 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:18,484 INFO L93 Difference]: Finished difference Result 666 states and 1417 transitions. [2021-06-05 05:39:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:39:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:18,486 INFO L225 Difference]: With dead ends: 666 [2021-06-05 05:39:18,486 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 05:39:18,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1007.4ms TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:39:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 05:39:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 451. [2021-06-05 05:39:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 2.2355555555555555) internal successors, (1006), 450 states have internal predecessors, (1006), 0 states have call successors, (0), 0 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 05:39:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1006 transitions. [2021-06-05 05:39:18,493 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1006 transitions. Word has length 27 [2021-06-05 05:39:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:18,493 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1006 transitions. [2021-06-05 05:39:18,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1006 transitions. [2021-06-05 05:39:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:18,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:18,494 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:18,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 05:39:18,694 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash 634102823, now seen corresponding path program 54 times [2021-06-05 05:39:18,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:18,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971327401] [2021-06-05 05:39:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:18,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:18,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971327401] [2021-06-05 05:39:18,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971327401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:18,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233005746] [2021-06-05 05:39:18,812 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:18,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:39:18,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:18,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:19,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233005746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:19,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:19,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 05:39:19,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038961815] [2021-06-05 05:39:19,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:39:19,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:19,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:39:19,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:39:19,084 INFO L87 Difference]: Start difference. First operand 451 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:19,775 INFO L93 Difference]: Finished difference Result 558 states and 1193 transitions. [2021-06-05 05:39:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:39:19,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:19,777 INFO L225 Difference]: With dead ends: 558 [2021-06-05 05:39:19,777 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 05:39:19,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 738.1ms TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:39:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 05:39:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 427. [2021-06-05 05:39:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.1338028169014085) internal successors, (909), 426 states have internal predecessors, (909), 0 states have call successors, (0), 0 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 05:39:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 909 transitions. [2021-06-05 05:39:19,783 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 909 transitions. Word has length 27 [2021-06-05 05:39:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:19,783 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 909 transitions. [2021-06-05 05:39:19,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 909 transitions. [2021-06-05 05:39:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:19,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:19,784 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:19,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:19,984 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash 177512313, now seen corresponding path program 55 times [2021-06-05 05:39:19,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:19,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443282921] [2021-06-05 05:39:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:20,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:20,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443282921] [2021-06-05 05:39:20,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443282921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:20,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6512246] [2021-06-05 05:39:20,176 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:39:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:20,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:39:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:20,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6512246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:20,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:20,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:39:20,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526673249] [2021-06-05 05:39:20,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:20,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:20,481 INFO L87 Difference]: Start difference. First operand 427 states and 909 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:22,073 INFO L93 Difference]: Finished difference Result 575 states and 1167 transitions. [2021-06-05 05:39:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:39:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:22,074 INFO L225 Difference]: With dead ends: 575 [2021-06-05 05:39:22,074 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 05:39:22,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1597.9ms TimeCoverageRelationStatistics Valid=739, Invalid=4091, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:39:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 05:39:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 341. [2021-06-05 05:39:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.126470588235294) internal successors, (723), 340 states have internal predecessors, (723), 0 states have call successors, (0), 0 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 05:39:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 723 transitions. [2021-06-05 05:39:22,079 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 723 transitions. Word has length 27 [2021-06-05 05:39:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:22,079 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 723 transitions. [2021-06-05 05:39:22,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:39:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 723 transitions. [2021-06-05 05:39:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:22,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:22,079 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:22,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:22,281 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1680806143, now seen corresponding path program 56 times [2021-06-05 05:39:22,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:22,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189113275] [2021-06-05 05:39:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:22,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189113275] [2021-06-05 05:39:22,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189113275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582528977] [2021-06-05 05:39:22,328 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:22,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:22,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:39:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:22,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582528977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:22,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:22,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:39:22,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656885446] [2021-06-05 05:39:22,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:39:22,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:39:22,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:22,399 INFO L87 Difference]: Start difference. First operand 341 states and 723 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 05:39:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:22,457 INFO L93 Difference]: Finished difference Result 501 states and 1034 transitions. [2021-06-05 05:39:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:39:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:39:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:22,458 INFO L225 Difference]: With dead ends: 501 [2021-06-05 05:39:22,458 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 05:39:22,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:39:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 05:39:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 314. [2021-06-05 05:39:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.121405750798722) internal successors, (664), 313 states have internal predecessors, (664), 0 states have call successors, (0), 0 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 05:39:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 664 transitions. [2021-06-05 05:39:22,461 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 664 transitions. Word has length 27 [2021-06-05 05:39:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:22,461 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 664 transitions. [2021-06-05 05:39:22,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 05:39:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 664 transitions. [2021-06-05 05:39:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:22,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:22,462 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:22,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:22,666 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:22,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1310861107, now seen corresponding path program 57 times [2021-06-05 05:39:22,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:22,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576215499] [2021-06-05 05:39:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:22,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:22,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576215499] [2021-06-05 05:39:22,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576215499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:22,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693856072] [2021-06-05 05:39:22,834 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:22,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:39:22,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:22,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:39:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:23,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693856072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:23,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:23,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 05:39:23,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242512609] [2021-06-05 05:39:23,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:39:23,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:23,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:39:23,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:39:23,147 INFO L87 Difference]: Start difference. First operand 314 states and 664 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:24,303 INFO L93 Difference]: Finished difference Result 613 states and 1226 transitions. [2021-06-05 05:39:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:39:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:24,304 INFO L225 Difference]: With dead ends: 613 [2021-06-05 05:39:24,304 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 05:39:24,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:39:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 05:39:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 333. [2021-06-05 05:39:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.1204819277108435) internal successors, (704), 332 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 05:39:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 704 transitions. [2021-06-05 05:39:24,308 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 704 transitions. Word has length 29 [2021-06-05 05:39:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:24,308 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 704 transitions. [2021-06-05 05:39:24,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 704 transitions. [2021-06-05 05:39:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:24,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:24,309 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:24,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:24,518 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:24,519 INFO L82 PathProgramCache]: Analyzing trace with hash 75290793, now seen corresponding path program 58 times [2021-06-05 05:39:24,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:24,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372201149] [2021-06-05 05:39:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:24,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:24,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372201149] [2021-06-05 05:39:24,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372201149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:24,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199186353] [2021-06-05 05:39:24,652 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:39:24,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:24,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:24,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:39:24,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:24,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199186353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:24,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:24,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 05:39:24,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418365014] [2021-06-05 05:39:24,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:24,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:24,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:24,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:24,998 INFO L87 Difference]: Start difference. First operand 333 states and 704 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:26,743 INFO L93 Difference]: Finished difference Result 809 states and 1602 transitions. [2021-06-05 05:39:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:39:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:26,745 INFO L225 Difference]: With dead ends: 809 [2021-06-05 05:39:26,745 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 05:39:26,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1556.3ms TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:39:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 05:39:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 437. [2021-06-05 05:39:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.1376146788990824) internal successors, (932), 436 states have internal predecessors, (932), 0 states have call successors, (0), 0 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 05:39:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 932 transitions. [2021-06-05 05:39:26,753 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 932 transitions. Word has length 29 [2021-06-05 05:39:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:26,753 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 932 transitions. [2021-06-05 05:39:26,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:26,754 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 932 transitions. [2021-06-05 05:39:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:26,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:26,754 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:26,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 05:39:26,955 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:26,955 INFO L82 PathProgramCache]: Analyzing trace with hash -937401739, now seen corresponding path program 59 times [2021-06-05 05:39:26,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:26,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081841293] [2021-06-05 05:39:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:27,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:27,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081841293] [2021-06-05 05:39:27,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081841293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:27,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064737401] [2021-06-05 05:39:27,102 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:27,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:39:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:27,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:39:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:27,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064737401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:27,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:27,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 05:39:27,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101085449] [2021-06-05 05:39:27,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:27,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:27,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:27,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:27,423 INFO L87 Difference]: Start difference. First operand 437 states and 932 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:29,720 INFO L93 Difference]: Finished difference Result 994 states and 1975 transitions. [2021-06-05 05:39:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 05:39:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:29,722 INFO L225 Difference]: With dead ends: 994 [2021-06-05 05:39:29,722 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 05:39:29,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 2001.5ms TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 05:39:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 05:39:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 420. [2021-06-05 05:39:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.1408114558472553) internal successors, (897), 419 states have internal predecessors, (897), 0 states have call successors, (0), 0 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 05:39:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 897 transitions. [2021-06-05 05:39:29,728 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 897 transitions. Word has length 29 [2021-06-05 05:39:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:29,728 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 897 transitions. [2021-06-05 05:39:29,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 897 transitions. [2021-06-05 05:39:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:29,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:29,729 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:29,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:29,930 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1615340429, now seen corresponding path program 60 times [2021-06-05 05:39:29,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:29,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500287475] [2021-06-05 05:39:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500287475] [2021-06-05 05:39:30,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500287475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804849389] [2021-06-05 05:39:30,100 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:30,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:39:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:30,126 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:39:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804849389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:30,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 05:39:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956083903] [2021-06-05 05:39:30,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:39:30,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:30,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:39:30,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:39:30,430 INFO L87 Difference]: Start difference. First operand 420 states and 897 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:31,619 INFO L93 Difference]: Finished difference Result 665 states and 1331 transitions. [2021-06-05 05:39:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:39:31,619 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:31,620 INFO L225 Difference]: With dead ends: 665 [2021-06-05 05:39:31,620 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 05:39:31,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1149.7ms TimeCoverageRelationStatistics Valid=543, Invalid=3489, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:39:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 05:39:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 459. [2021-06-05 05:39:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.1397379912663754) internal successors, (980), 458 states have internal predecessors, (980), 0 states have call successors, (0), 0 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 05:39:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 980 transitions. [2021-06-05 05:39:31,625 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 980 transitions. Word has length 29 [2021-06-05 05:39:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:31,625 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 980 transitions. [2021-06-05 05:39:31,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 980 transitions. [2021-06-05 05:39:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:31,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:31,626 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:31,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 05:39:31,827 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:31,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1666934335, now seen corresponding path program 61 times [2021-06-05 05:39:31,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:31,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515537456] [2021-06-05 05:39:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:31,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:31,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515537456] [2021-06-05 05:39:31,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515537456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:31,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278501081] [2021-06-05 05:39:31,973 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:31,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:39:31,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:32,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278501081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:32,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:32,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 05:39:32,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811977772] [2021-06-05 05:39:32,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:32,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:32,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:32,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:32,267 INFO L87 Difference]: Start difference. First operand 459 states and 980 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:33,929 INFO L93 Difference]: Finished difference Result 740 states and 1463 transitions. [2021-06-05 05:39:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:39:33,930 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:33,931 INFO L225 Difference]: With dead ends: 740 [2021-06-05 05:39:33,931 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 05:39:33,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 1554.1ms TimeCoverageRelationStatistics Valid=756, Invalid=5886, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:39:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 05:39:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 376. [2021-06-05 05:39:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.1413333333333333) internal successors, (803), 375 states have internal predecessors, (803), 0 states have call successors, (0), 0 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 05:39:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 803 transitions. [2021-06-05 05:39:33,935 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 803 transitions. Word has length 29 [2021-06-05 05:39:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:33,936 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 803 transitions. [2021-06-05 05:39:33,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 803 transitions. [2021-06-05 05:39:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:33,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:33,936 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:34,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:34,137 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -303996619, now seen corresponding path program 62 times [2021-06-05 05:39:34,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:34,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850184320] [2021-06-05 05:39:34,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:34,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:34,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850184320] [2021-06-05 05:39:34,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850184320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:34,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132574617] [2021-06-05 05:39:34,395 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:34,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:34,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:34,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:39:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:34,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132574617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:34,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:34,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 05:39:34,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140121376] [2021-06-05 05:39:34,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:39:34,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:34,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:39:34,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:39:34,779 INFO L87 Difference]: Start difference. First operand 376 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:38,839 INFO L93 Difference]: Finished difference Result 945 states and 1899 transitions. [2021-06-05 05:39:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 05:39:38,840 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:38,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:38,841 INFO L225 Difference]: With dead ends: 945 [2021-06-05 05:39:38,841 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 05:39:38,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3771.2ms TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:39:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 05:39:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 438. [2021-06-05 05:39:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.1556064073226544) internal successors, (942), 437 states have internal predecessors, (942), 0 states have call successors, (0), 0 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 05:39:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 942 transitions. [2021-06-05 05:39:38,857 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 942 transitions. Word has length 29 [2021-06-05 05:39:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:38,858 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 942 transitions. [2021-06-05 05:39:38,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 942 transitions. [2021-06-05 05:39:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:38,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:38,858 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:39,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:39,059 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash 649114413, now seen corresponding path program 63 times [2021-06-05 05:39:39,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:39,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458418518] [2021-06-05 05:39:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:39,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:39,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458418518] [2021-06-05 05:39:39,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458418518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:39,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659443984] [2021-06-05 05:39:39,338 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:39,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:39:39,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:39,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:39:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:39,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659443984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:39,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:39,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-06-05 05:39:39,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056271332] [2021-06-05 05:39:39,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:39:39,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:39,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:39:39,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:39:39,688 INFO L87 Difference]: Start difference. First operand 438 states and 942 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:40,796 INFO L93 Difference]: Finished difference Result 599 states and 1229 transitions. [2021-06-05 05:39:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:39:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:40,797 INFO L225 Difference]: With dead ends: 599 [2021-06-05 05:39:40,797 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 05:39:40,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1188.1ms TimeCoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:39:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 05:39:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 431. [2021-06-05 05:39:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.1372093023255814) internal successors, (919), 430 states have internal predecessors, (919), 0 states have call successors, (0), 0 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 05:39:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 919 transitions. [2021-06-05 05:39:40,802 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 919 transitions. Word has length 29 [2021-06-05 05:39:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:40,802 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 919 transitions. [2021-06-05 05:39:40,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 919 transitions. [2021-06-05 05:39:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:40,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:40,803 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:41,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:41,026 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1614463413, now seen corresponding path program 64 times [2021-06-05 05:39:41,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:41,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731255699] [2021-06-05 05:39:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:41,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:41,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731255699] [2021-06-05 05:39:41,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731255699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:41,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691366941] [2021-06-05 05:39:41,295 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:41,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:41,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:41,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:39:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:41,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691366941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:41,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:41,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 05:39:41,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216116906] [2021-06-05 05:39:41,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:39:41,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:39:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:39:41,773 INFO L87 Difference]: Start difference. First operand 431 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:43,362 INFO L93 Difference]: Finished difference Result 661 states and 1333 transitions. [2021-06-05 05:39:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:39:43,362 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:43,363 INFO L225 Difference]: With dead ends: 661 [2021-06-05 05:39:43,363 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 05:39:43,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1655.9ms TimeCoverageRelationStatistics Valid=535, Invalid=3755, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:39:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 05:39:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 362. [2021-06-05 05:39:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 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 05:39:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-06-05 05:39:43,369 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 29 [2021-06-05 05:39:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:43,369 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-06-05 05:39:43,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-06-05 05:39:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:43,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:43,369 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:43,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:43,570 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash -184540877, now seen corresponding path program 65 times [2021-06-05 05:39:43,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:43,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454688862] [2021-06-05 05:39:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:43,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:43,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454688862] [2021-06-05 05:39:43,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454688862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:43,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540637709] [2021-06-05 05:39:43,729 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:43,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:39:43,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:43,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:39:43,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:44,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540637709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:44,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:44,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 05:39:44,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525656566] [2021-06-05 05:39:44,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:39:44,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:44,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:39:44,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:39:44,041 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:45,442 INFO L93 Difference]: Finished difference Result 586 states and 1201 transitions. [2021-06-05 05:39:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:39:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:39:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:45,444 INFO L225 Difference]: With dead ends: 586 [2021-06-05 05:39:45,444 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 05:39:45,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1402.8ms TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:39:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 05:39:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 194. [2021-06-05 05:39:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.051813471502591) internal successors, (396), 193 states have internal predecessors, (396), 0 states have call successors, (0), 0 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 05:39:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 396 transitions. [2021-06-05 05:39:45,448 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 396 transitions. Word has length 29 [2021-06-05 05:39:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:45,448 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 396 transitions. [2021-06-05 05:39:45,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 396 transitions. [2021-06-05 05:39:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:45,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:45,449 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:45,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 05:39:45,671 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:45,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 66 times [2021-06-05 05:39:45,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:45,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585555459] [2021-06-05 05:39:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:45,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:45,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585555459] [2021-06-05 05:39:45,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585555459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:45,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30838015] [2021-06-05 05:39:45,955 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:45,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:39:45,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:45,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:39:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:46,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30838015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:46,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:46,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 05:39:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708324556] [2021-06-05 05:39:46,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:39:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:39:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:39:46,380 INFO L87 Difference]: Start difference. First operand 194 states and 396 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:47,859 INFO L93 Difference]: Finished difference Result 469 states and 906 transitions. [2021-06-05 05:39:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:39:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:39:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:47,860 INFO L225 Difference]: With dead ends: 469 [2021-06-05 05:39:47,860 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 05:39:47,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1646.7ms TimeCoverageRelationStatistics Valid=731, Invalid=4969, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:39:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 05:39:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 248. [2021-06-05 05:39:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.1214574898785425) internal successors, (524), 247 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 05:39:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 524 transitions. [2021-06-05 05:39:47,864 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 524 transitions. Word has length 31 [2021-06-05 05:39:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:47,865 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 524 transitions. [2021-06-05 05:39:47,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 524 transitions. [2021-06-05 05:39:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:47,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:47,865 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:48,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:39:48,066 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:48,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1037382439, now seen corresponding path program 67 times [2021-06-05 05:39:48,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:48,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925651185] [2021-06-05 05:39:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:48,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:48,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925651185] [2021-06-05 05:39:48,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925651185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:48,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609632942] [2021-06-05 05:39:48,316 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:48,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:39:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:48,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609632942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:48,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:48,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:39:48,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403963624] [2021-06-05 05:39:48,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:39:48,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:48,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:39:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:39:48,683 INFO L87 Difference]: Start difference. First operand 248 states and 524 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:50,249 INFO L93 Difference]: Finished difference Result 489 states and 939 transitions. [2021-06-05 05:39:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:39:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:39:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:50,250 INFO L225 Difference]: With dead ends: 489 [2021-06-05 05:39:50,250 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 05:39:50,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1641.1ms TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:39:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 05:39:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 250. [2021-06-05 05:39:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.1204819277108435) internal successors, (528), 249 states have internal predecessors, (528), 0 states have call successors, (0), 0 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 05:39:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 528 transitions. [2021-06-05 05:39:50,254 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 528 transitions. Word has length 31 [2021-06-05 05:39:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:50,254 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 528 transitions. [2021-06-05 05:39:50,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 528 transitions. [2021-06-05 05:39:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:50,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:50,255 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:50,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:50,469 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:50,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:50,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2133425259, now seen corresponding path program 68 times [2021-06-05 05:39:50,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:50,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787313345] [2021-06-05 05:39:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:50,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:50,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787313345] [2021-06-05 05:39:50,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787313345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:50,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005289296] [2021-06-05 05:39:50,716 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:50,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:50,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:50,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:39:50,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:51,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005289296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:51,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:51,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:39:51,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431007964] [2021-06-05 05:39:51,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:39:51,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:51,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:39:51,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:39:51,053 INFO L87 Difference]: Start difference. First operand 250 states and 528 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:52,857 INFO L93 Difference]: Finished difference Result 487 states and 937 transitions. [2021-06-05 05:39:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:39:52,857 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:39:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:52,858 INFO L225 Difference]: With dead ends: 487 [2021-06-05 05:39:52,858 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 05:39:52,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1759.7ms TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:39:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 05:39:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 252. [2021-06-05 05:39:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.1195219123505975) internal successors, (532), 251 states have internal predecessors, (532), 0 states have call successors, (0), 0 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 05:39:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 532 transitions. [2021-06-05 05:39:52,861 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 532 transitions. Word has length 31 [2021-06-05 05:39:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:52,861 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 532 transitions. [2021-06-05 05:39:52,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 532 transitions. [2021-06-05 05:39:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:52,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:52,862 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:53,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:53,063 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1329117521, now seen corresponding path program 69 times [2021-06-05 05:39:53,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:53,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852522672] [2021-06-05 05:39:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:53,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852522672] [2021-06-05 05:39:53,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852522672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681256535] [2021-06-05 05:39:53,355 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:53,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:39:53,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:53,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:39:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:53,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681256535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:53,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:53,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:39:53,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907501031] [2021-06-05 05:39:53,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:39:53,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:53,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:39:53,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:39:53,761 INFO L87 Difference]: Start difference. First operand 252 states and 532 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:55,840 INFO L93 Difference]: Finished difference Result 532 states and 1020 transitions. [2021-06-05 05:39:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:39:55,841 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:39:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:55,841 INFO L225 Difference]: With dead ends: 532 [2021-06-05 05:39:55,842 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 05:39:55,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 2104.3ms TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:39:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 05:39:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 255. [2021-06-05 05:39:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 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 05:39:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-06-05 05:39:55,845 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-06-05 05:39:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:55,845 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-06-05 05:39:55,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-06-05 05:39:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:55,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:55,846 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:56,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:56,046 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1700921915, now seen corresponding path program 70 times [2021-06-05 05:39:56,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:56,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79350817] [2021-06-05 05:39:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:56,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:56,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79350817] [2021-06-05 05:39:56,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79350817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:56,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627722056] [2021-06-05 05:39:56,314 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:56,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:56,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:56,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:39:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:56,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627722056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:56,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:56,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:39:56,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896933583] [2021-06-05 05:39:56,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:39:56,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:39:56,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:39:56,745 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:58,547 INFO L93 Difference]: Finished difference Result 465 states and 897 transitions. [2021-06-05 05:39:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:39:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:39:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:58,548 INFO L225 Difference]: With dead ends: 465 [2021-06-05 05:39:58,548 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 05:39:58,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 1912.1ms TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:39:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 05:39:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 255. [2021-06-05 05:39:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 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 05:39:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-06-05 05:39:58,552 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-06-05 05:39:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:58,552 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-06-05 05:39:58,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:39:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-06-05 05:39:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:58,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:58,552 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:58,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 05:39:58,753 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:58,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:58,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1287765489, now seen corresponding path program 71 times [2021-06-05 05:39:58,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:58,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847468688] [2021-06-05 05:39:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:59,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:59,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847468688] [2021-06-05 05:39:59,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847468688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:59,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230151114] [2021-06-05 05:39:59,027 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:59,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:39:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:59,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:39:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:59,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230151114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:59,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:59,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:39:59,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839493761] [2021-06-05 05:39:59,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:39:59,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:59,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:39:59,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:39:59,404 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:01,007 INFO L93 Difference]: Finished difference Result 465 states and 901 transitions. [2021-06-05 05:40:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:40:01,007 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:40:01,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:01,008 INFO L225 Difference]: With dead ends: 465 [2021-06-05 05:40:01,008 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 05:40:01,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1684.1ms TimeCoverageRelationStatistics Valid=752, Invalid=5568, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:40:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 05:40:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 265. [2021-06-05 05:40:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.121212121212121) internal successors, (560), 264 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 05:40:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 560 transitions. [2021-06-05 05:40:01,011 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 560 transitions. Word has length 31 [2021-06-05 05:40:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:01,011 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 560 transitions. [2021-06-05 05:40:01,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 560 transitions. [2021-06-05 05:40:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:40:01,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:01,012 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:01,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:01,217 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2120190005, now seen corresponding path program 72 times [2021-06-05 05:40:01,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:01,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353655906] [2021-06-05 05:40:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:01,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:01,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353655906] [2021-06-05 05:40:01,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353655906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:01,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759540714] [2021-06-05 05:40:01,464 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:01,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:40:01,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:01,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:40:01,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:01,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759540714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:01,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:01,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:40:01,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925224203] [2021-06-05 05:40:01,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:40:01,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:40:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:40:01,821 INFO L87 Difference]: Start difference. First operand 265 states and 560 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:03,724 INFO L93 Difference]: Finished difference Result 518 states and 999 transitions. [2021-06-05 05:40:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:40:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:40:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:03,725 INFO L225 Difference]: With dead ends: 518 [2021-06-05 05:40:03,725 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 05:40:03,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 1841.3ms TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:40:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 05:40:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 267. [2021-06-05 05:40:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1240601503759398) internal successors, (565), 266 states have internal predecessors, (565), 0 states have call successors, (0), 0 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 05:40:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 565 transitions. [2021-06-05 05:40:03,729 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 565 transitions. Word has length 31 [2021-06-05 05:40:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:03,729 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 565 transitions. [2021-06-05 05:40:03,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:03,729 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 565 transitions. [2021-06-05 05:40:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:40:03,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:03,729 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:03,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:03,930 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:03,930 INFO L82 PathProgramCache]: Analyzing trace with hash 855262145, now seen corresponding path program 73 times [2021-06-05 05:40:03,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:03,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529942443] [2021-06-05 05:40:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:04,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:04,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529942443] [2021-06-05 05:40:04,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529942443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:04,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194683510] [2021-06-05 05:40:04,185 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:04,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:40:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:04,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194683510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:04,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:04,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:40:04,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937266142] [2021-06-05 05:40:04,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:40:04,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:04,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:40:04,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:40:04,525 INFO L87 Difference]: Start difference. First operand 267 states and 565 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:06,506 INFO L93 Difference]: Finished difference Result 448 states and 878 transitions. [2021-06-05 05:40:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:40:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:40:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:06,507 INFO L225 Difference]: With dead ends: 448 [2021-06-05 05:40:06,507 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 05:40:06,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1888.1ms TimeCoverageRelationStatistics Valid=808, Invalid=5044, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:40:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 05:40:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 263. [2021-06-05 05:40:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.1068702290076335) internal successors, (552), 262 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 05:40:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 552 transitions. [2021-06-05 05:40:06,510 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 552 transitions. Word has length 31 [2021-06-05 05:40:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:06,510 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 552 transitions. [2021-06-05 05:40:06,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 552 transitions. [2021-06-05 05:40:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:40:06,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:06,511 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:06,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:06,712 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 389420273, now seen corresponding path program 74 times [2021-06-05 05:40:06,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:06,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043677923] [2021-06-05 05:40:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:06,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:06,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043677923] [2021-06-05 05:40:06,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043677923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:06,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120921648] [2021-06-05 05:40:06,902 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:06,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:06,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:06,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:40:06,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:07,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120921648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:07,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:07,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:40:07,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908047055] [2021-06-05 05:40:07,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:40:07,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:07,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:40:07,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:40:07,264 INFO L87 Difference]: Start difference. First operand 263 states and 552 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:09,372 INFO L93 Difference]: Finished difference Result 529 states and 1039 transitions. [2021-06-05 05:40:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:40:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:40:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:09,373 INFO L225 Difference]: With dead ends: 529 [2021-06-05 05:40:09,373 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 05:40:09,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 2068.6ms TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:40:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 05:40:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 276. [2021-06-05 05:40:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1163636363636362) internal successors, (582), 275 states have internal predecessors, (582), 0 states have call successors, (0), 0 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 05:40:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 582 transitions. [2021-06-05 05:40:09,376 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 582 transitions. Word has length 31 [2021-06-05 05:40:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:09,376 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 582 transitions. [2021-06-05 05:40:09,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 582 transitions. [2021-06-05 05:40:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:40:09,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:09,377 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:09,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 05:40:09,578 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash -875507587, now seen corresponding path program 75 times [2021-06-05 05:40:09,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:09,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931769107] [2021-06-05 05:40:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:09,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:09,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931769107] [2021-06-05 05:40:09,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931769107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:09,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297280610] [2021-06-05 05:40:09,816 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:40:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:09,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 05:40:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:10,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297280610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:10,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:10,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:40:10,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993332482] [2021-06-05 05:40:10,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:40:10,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:10,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:40:10,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:40:10,191 INFO L87 Difference]: Start difference. First operand 276 states and 582 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:12,283 INFO L93 Difference]: Finished difference Result 518 states and 1018 transitions. [2021-06-05 05:40:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:40:12,283 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-06-05 05:40:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:12,284 INFO L225 Difference]: With dead ends: 518 [2021-06-05 05:40:12,284 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 05:40:12,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1970.0ms TimeCoverageRelationStatistics Valid=909, Invalid=6063, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:40:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 05:40:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 273. [2021-06-05 05:40:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.099264705882353) internal successors, (571), 272 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 571 transitions. [2021-06-05 05:40:12,287 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 571 transitions. Word has length 31 [2021-06-05 05:40:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:12,288 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 571 transitions. [2021-06-05 05:40:12,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:40:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 571 transitions. [2021-06-05 05:40:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:40:12,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:12,288 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:12,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:12,489 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1413332923, now seen corresponding path program 76 times [2021-06-05 05:40:12,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:12,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422908627] [2021-06-05 05:40:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:12,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422908627] [2021-06-05 05:40:12,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422908627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295218443] [2021-06-05 05:40:12,711 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:12,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:12,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:12,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:40:12,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:13,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295218443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:13,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:13,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-06-05 05:40:13,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256321550] [2021-06-05 05:40:13,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:40:13,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:13,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:40:13,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:40:13,235 INFO L87 Difference]: Start difference. First operand 273 states and 571 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:40:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:15,487 INFO L93 Difference]: Finished difference Result 473 states and 960 transitions. [2021-06-05 05:40:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:40:15,487 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 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 31 [2021-06-05 05:40:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:15,488 INFO L225 Difference]: With dead ends: 473 [2021-06-05 05:40:15,488 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 05:40:15,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 2230.9ms TimeCoverageRelationStatistics Valid=655, Invalid=4315, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:40:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 05:40:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 303. [2021-06-05 05:40:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.096026490066225) internal successors, (633), 302 states have internal predecessors, (633), 0 states have call successors, (0), 0 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 05:40:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 633 transitions. [2021-06-05 05:40:15,492 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 633 transitions. Word has length 31 [2021-06-05 05:40:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:15,493 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 633 transitions. [2021-06-05 05:40:15,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 05:40:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 633 transitions. [2021-06-05 05:40:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:40:15,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:15,493 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:15,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:40:15,694 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:15,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1311105745, now seen corresponding path program 77 times [2021-06-05 05:40:15,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:15,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906992010] [2021-06-05 05:40:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:40:15,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906992010] [2021-06-05 05:40:15,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906992010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690412815] [2021-06-05 05:40:15,755 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:15,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:40:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:40:15,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:40:15,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690412815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:15,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:15,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:40:15,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353326385] [2021-06-05 05:40:15,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:40:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:40:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:40:15,861 INFO L87 Difference]: Start difference. First operand 303 states and 633 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:15,959 INFO L93 Difference]: Finished difference Result 483 states and 979 transitions. [2021-06-05 05:40:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:40:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:40:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:15,961 INFO L225 Difference]: With dead ends: 483 [2021-06-05 05:40:15,961 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 05:40:15,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:40:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 05:40:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 310. [2021-06-05 05:40:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.0938511326860842) internal successors, (647), 309 states have internal predecessors, (647), 0 states have call successors, (0), 0 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 05:40:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 647 transitions. [2021-06-05 05:40:15,965 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 647 transitions. Word has length 33 [2021-06-05 05:40:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:15,965 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 647 transitions. [2021-06-05 05:40:15,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 647 transitions. [2021-06-05 05:40:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:40:15,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:15,966 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:16,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:40:16,189 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1845552953, now seen corresponding path program 78 times [2021-06-05 05:40:16,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:16,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384448747] [2021-06-05 05:40:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:16,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:16,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384448747] [2021-06-05 05:40:16,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384448747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:16,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436624260] [2021-06-05 05:40:16,487 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:16,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:40:16,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:16,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:40:16,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436624260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:17,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:17,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 05:40:17,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594255315] [2021-06-05 05:40:17,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:40:17,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:17,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:40:17,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:40:17,003 INFO L87 Difference]: Start difference. First operand 310 states and 647 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 05:40:21,173 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 05:40:21,976 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 05:40:22,228 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 05:40:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:24,259 INFO L93 Difference]: Finished difference Result 1038 states and 2060 transitions. [2021-06-05 05:40:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 05:40:24,260 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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) Word has length 33 [2021-06-05 05:40:24,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:24,261 INFO L225 Difference]: With dead ends: 1038 [2021-06-05 05:40:24,261 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 05:40:24,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 6670.2ms TimeCoverageRelationStatistics Valid=2584, Invalid=18008, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 05:40:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 05:40:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 386. [2021-06-05 05:40:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.109090909090909) internal successors, (812), 385 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 05:40:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 812 transitions. [2021-06-05 05:40:24,267 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 812 transitions. Word has length 33 [2021-06-05 05:40:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:24,267 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 812 transitions. [2021-06-05 05:40:24,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 05:40:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 812 transitions. [2021-06-05 05:40:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:40:24,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:24,268 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:24,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:40:24,468 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash -360118039, now seen corresponding path program 79 times [2021-06-05 05:40:24,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:24,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317180099] [2021-06-05 05:40:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:40:24,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:24,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317180099] [2021-06-05 05:40:24,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317180099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:24,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031523153] [2021-06-05 05:40:24,734 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:24,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:40:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:25,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031523153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:25,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:25,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 05:40:25,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489662407] [2021-06-05 05:40:25,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:40:25,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:25,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:40:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:40:25,185 INFO L87 Difference]: Start difference. First operand 386 states and 812 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 05:40:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:26,653 INFO L93 Difference]: Finished difference Result 583 states and 1174 transitions. [2021-06-05 05:40:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:40:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 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 33 [2021-06-05 05:40:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:26,654 INFO L225 Difference]: With dead ends: 583 [2021-06-05 05:40:26,654 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 05:40:26,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1441.2ms TimeCoverageRelationStatistics Valid=418, Invalid=4004, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:40:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 05:40:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 349. [2021-06-05 05:40:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.103448275862069) internal successors, (732), 348 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 732 transitions. [2021-06-05 05:40:26,658 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 732 transitions. Word has length 33 [2021-06-05 05:40:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:26,658 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 732 transitions. [2021-06-05 05:40:26,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 05:40:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 732 transitions. [2021-06-05 05:40:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:26,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:26,658 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:26,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:26,860 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:26,860 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 80 times [2021-06-05 05:40:26,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:26,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264893938] [2021-06-05 05:40:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:27,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:27,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264893938] [2021-06-05 05:40:27,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264893938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:27,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264960218] [2021-06-05 05:40:27,106 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:27,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:27,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:27,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:40:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:27,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264960218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:27,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:27,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:27,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557866783] [2021-06-05 05:40:27,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:27,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:27,561 INFO L87 Difference]: Start difference. First operand 349 states and 732 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:29,321 INFO L93 Difference]: Finished difference Result 782 states and 1584 transitions. [2021-06-05 05:40:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:40:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:29,322 INFO L225 Difference]: With dead ends: 782 [2021-06-05 05:40:29,322 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 05:40:29,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1890.3ms TimeCoverageRelationStatistics Valid=913, Invalid=6227, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:40:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 05:40:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 461. [2021-06-05 05:40:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.1869565217391305) internal successors, (1006), 460 states have internal predecessors, (1006), 0 states have call successors, (0), 0 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 05:40:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1006 transitions. [2021-06-05 05:40:29,329 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1006 transitions. Word has length 35 [2021-06-05 05:40:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:29,329 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1006 transitions. [2021-06-05 05:40:29,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1006 transitions. [2021-06-05 05:40:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:29,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:29,330 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:29,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:29,553 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1678953501, now seen corresponding path program 81 times [2021-06-05 05:40:29,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:29,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492333785] [2021-06-05 05:40:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:29,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492333785] [2021-06-05 05:40:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492333785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831710601] [2021-06-05 05:40:29,818 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:29,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:40:29,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:29,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:40:29,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:30,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831710601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:30,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:30,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:30,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887595408] [2021-06-05 05:40:30,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:30,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:30,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:30,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:30,226 INFO L87 Difference]: Start difference. First operand 461 states and 1006 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:32,101 INFO L93 Difference]: Finished difference Result 808 states and 1627 transitions. [2021-06-05 05:40:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:40:32,102 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:32,103 INFO L225 Difference]: With dead ends: 808 [2021-06-05 05:40:32,103 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 05:40:32,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 1943.4ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:40:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 05:40:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 463. [2021-06-05 05:40:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.186147186147186) internal successors, (1010), 462 states have internal predecessors, (1010), 0 states have call successors, (0), 0 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 05:40:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1010 transitions. [2021-06-05 05:40:32,111 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1010 transitions. Word has length 35 [2021-06-05 05:40:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:32,111 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1010 transitions. [2021-06-05 05:40:32,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1010 transitions. [2021-06-05 05:40:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:32,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:32,112 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:32,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:32,325 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:32,326 INFO L82 PathProgramCache]: Analyzing trace with hash -648791001, now seen corresponding path program 82 times [2021-06-05 05:40:32,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:32,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290337426] [2021-06-05 05:40:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:32,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:32,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290337426] [2021-06-05 05:40:32,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290337426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:32,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329417411] [2021-06-05 05:40:32,587 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:32,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:32,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:32,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:40:32,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:32,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329417411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:32,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:32,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:32,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473939440] [2021-06-05 05:40:32,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:32,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:32,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:32,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:32,987 INFO L87 Difference]: Start difference. First operand 463 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:35,100 INFO L93 Difference]: Finished difference Result 806 states and 1625 transitions. [2021-06-05 05:40:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:40:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:35,102 INFO L225 Difference]: With dead ends: 806 [2021-06-05 05:40:35,102 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 05:40:35,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 2053.8ms TimeCoverageRelationStatistics Valid=1094, Invalid=7836, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:40:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 05:40:35,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 465. [2021-06-05 05:40:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.185344827586207) internal successors, (1014), 464 states have internal predecessors, (1014), 0 states have call successors, (0), 0 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 05:40:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1014 transitions. [2021-06-05 05:40:35,108 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1014 transitions. Word has length 35 [2021-06-05 05:40:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:35,108 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1014 transitions. [2021-06-05 05:40:35,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1014 transitions. [2021-06-05 05:40:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:35,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:35,109 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:35,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:35,309 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:35,310 INFO L82 PathProgramCache]: Analyzing trace with hash 447251819, now seen corresponding path program 83 times [2021-06-05 05:40:35,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:35,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585047231] [2021-06-05 05:40:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:35,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:35,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585047231] [2021-06-05 05:40:35,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585047231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:35,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036961333] [2021-06-05 05:40:35,629 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:35,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:40:35,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:35,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:40:35,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:36,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036961333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:36,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:36,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:36,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90392233] [2021-06-05 05:40:36,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:36,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:36,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:36,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:36,051 INFO L87 Difference]: Start difference. First operand 465 states and 1014 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:38,295 INFO L93 Difference]: Finished difference Result 806 states and 1627 transitions. [2021-06-05 05:40:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:40:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:38,297 INFO L225 Difference]: With dead ends: 806 [2021-06-05 05:40:38,297 INFO L226 Difference]: Without dead ends: 768 [2021-06-05 05:40:38,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 2244.3ms TimeCoverageRelationStatistics Valid=1216, Invalid=8684, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 05:40:38,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-05 05:40:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-06-05 05:40:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.184549356223176) internal successors, (1018), 466 states have internal predecessors, (1018), 0 states have call successors, (0), 0 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 05:40:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1018 transitions. [2021-06-05 05:40:38,309 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1018 transitions. Word has length 35 [2021-06-05 05:40:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:38,309 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1018 transitions. [2021-06-05 05:40:38,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1018 transitions. [2021-06-05 05:40:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:38,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:38,310 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:38,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 05:40:38,511 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:38,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1279676335, now seen corresponding path program 84 times [2021-06-05 05:40:38,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:38,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050644674] [2021-06-05 05:40:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:38,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:38,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050644674] [2021-06-05 05:40:38,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050644674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:38,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555748061] [2021-06-05 05:40:38,803 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:38,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:40:38,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:38,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:40:38,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:39,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555748061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:39,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:39,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:39,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181972091] [2021-06-05 05:40:39,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:39,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:39,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:39,347 INFO L87 Difference]: Start difference. First operand 467 states and 1018 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:42,899 INFO L93 Difference]: Finished difference Result 865 states and 1736 transitions. [2021-06-05 05:40:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 05:40:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:42,901 INFO L225 Difference]: With dead ends: 865 [2021-06-05 05:40:42,901 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 05:40:42,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 3158.6ms TimeCoverageRelationStatistics Valid=1448, Invalid=10984, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 05:40:42,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 05:40:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 470. [2021-06-05 05:40:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 05:40:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-06-05 05:40:42,910 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-06-05 05:40:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:42,910 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-06-05 05:40:42,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-06-05 05:40:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:42,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:42,911 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:43,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:40:43,133 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:43,133 INFO L82 PathProgramCache]: Analyzing trace with hash 14748475, now seen corresponding path program 85 times [2021-06-05 05:40:43,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:43,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501430262] [2021-06-05 05:40:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:43,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:43,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501430262] [2021-06-05 05:40:43,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501430262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:43,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009715812] [2021-06-05 05:40:43,527 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:43,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:40:43,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009715812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:43,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:43,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:43,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824336971] [2021-06-05 05:40:43,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:43,952 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:46,339 INFO L93 Difference]: Finished difference Result 746 states and 1501 transitions. [2021-06-05 05:40:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:40:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:46,340 INFO L225 Difference]: With dead ends: 746 [2021-06-05 05:40:46,340 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 05:40:46,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 2328.5ms TimeCoverageRelationStatistics Valid=1253, Invalid=7867, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 05:40:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 05:40:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 470. [2021-06-05 05:40:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 05:40:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-06-05 05:40:46,345 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-06-05 05:40:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:46,345 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-06-05 05:40:46,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-06-05 05:40:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:46,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:46,346 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:46,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 05:40:46,547 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1579011027, now seen corresponding path program 86 times [2021-06-05 05:40:46,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:46,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814335541] [2021-06-05 05:40:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:46,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:46,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814335541] [2021-06-05 05:40:46,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814335541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:46,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741888937] [2021-06-05 05:40:46,788 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:46,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:46,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:40:46,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:47,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741888937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:47,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:47,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:47,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768280130] [2021-06-05 05:40:47,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:47,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:47,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:47,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:47,190 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:49,179 INFO L93 Difference]: Finished difference Result 776 states and 1568 transitions. [2021-06-05 05:40:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:40:49,179 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:49,180 INFO L225 Difference]: With dead ends: 776 [2021-06-05 05:40:49,180 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 05:40:49,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 1886.3ms TimeCoverageRelationStatistics Valid=930, Invalid=7080, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:40:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 05:40:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 476. [2021-06-05 05:40:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.185263157894737) internal successors, (1038), 475 states have internal predecessors, (1038), 0 states have call successors, (0), 0 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 05:40:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1038 transitions. [2021-06-05 05:40:49,185 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1038 transitions. Word has length 35 [2021-06-05 05:40:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:49,185 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1038 transitions. [2021-06-05 05:40:49,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1038 transitions. [2021-06-05 05:40:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:49,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:49,186 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:49,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:40:49,389 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -482968207, now seen corresponding path program 87 times [2021-06-05 05:40:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:49,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717088160] [2021-06-05 05:40:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:49,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717088160] [2021-06-05 05:40:49,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717088160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874611473] [2021-06-05 05:40:49,631 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:49,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:40:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:49,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:40:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:50,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874611473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:50,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:50,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:50,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462971331] [2021-06-05 05:40:50,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:50,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:50,244 INFO L87 Difference]: Start difference. First operand 476 states and 1038 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:52,998 INFO L93 Difference]: Finished difference Result 777 states and 1580 transitions. [2021-06-05 05:40:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:40:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:52,999 INFO L225 Difference]: With dead ends: 777 [2021-06-05 05:40:52,999 INFO L226 Difference]: Without dead ends: 739 [2021-06-05 05:40:53,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2591.6ms TimeCoverageRelationStatistics Valid=1089, Invalid=8613, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 05:40:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-05 05:40:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 482. [2021-06-05 05:40:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.191268191268191) internal successors, (1054), 481 states have internal predecessors, (1054), 0 states have call successors, (0), 0 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 05:40:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1054 transitions. [2021-06-05 05:40:53,006 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1054 transitions. Word has length 35 [2021-06-05 05:40:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:53,006 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1054 transitions. [2021-06-05 05:40:53,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1054 transitions. [2021-06-05 05:40:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:53,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:53,006 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:53,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 05:40:53,207 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:53,207 INFO L82 PathProgramCache]: Analyzing trace with hash 349456309, now seen corresponding path program 88 times [2021-06-05 05:40:53,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:53,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340389267] [2021-06-05 05:40:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:53,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:53,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340389267] [2021-06-05 05:40:53,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340389267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:53,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067347398] [2021-06-05 05:40:53,497 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:53,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:53,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:53,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:40:53,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:53,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067347398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:53,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:53,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:53,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80541193] [2021-06-05 05:40:53,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:53,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:53,931 INFO L87 Difference]: Start difference. First operand 482 states and 1054 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:56,267 INFO L93 Difference]: Finished difference Result 849 states and 1716 transitions. [2021-06-05 05:40:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:40:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:56,268 INFO L225 Difference]: With dead ends: 849 [2021-06-05 05:40:56,268 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 05:40:56,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 2306.8ms TimeCoverageRelationStatistics Valid=1198, Invalid=8504, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 05:40:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 05:40:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 486. [2021-06-05 05:40:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.195876288659794) internal successors, (1065), 485 states have internal predecessors, (1065), 0 states have call successors, (0), 0 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 05:40:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1065 transitions. [2021-06-05 05:40:56,277 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1065 transitions. Word has length 35 [2021-06-05 05:40:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:56,277 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1065 transitions. [2021-06-05 05:40:56,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1065 transitions. [2021-06-05 05:40:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:56,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:56,278 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:56,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:56,493 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash -915471551, now seen corresponding path program 89 times [2021-06-05 05:40:56,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:56,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855572257] [2021-06-05 05:40:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:56,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:56,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855572257] [2021-06-05 05:40:56,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855572257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641481176] [2021-06-05 05:40:56,769 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:56,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:40:56,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:56,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:40:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:57,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641481176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:57,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:57,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:40:57,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939386755] [2021-06-05 05:40:57,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:57,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:57,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:57,173 INFO L87 Difference]: Start difference. First operand 486 states and 1065 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:59,403 INFO L93 Difference]: Finished difference Result 747 states and 1522 transitions. [2021-06-05 05:40:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:40:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:40:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:59,404 INFO L225 Difference]: With dead ends: 747 [2021-06-05 05:40:59,404 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 05:40:59,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 2126.4ms TimeCoverageRelationStatistics Valid=1132, Invalid=7240, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:40:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 05:40:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 388. [2021-06-05 05:40:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.13953488372093) internal successors, (828), 387 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 05:40:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 828 transitions. [2021-06-05 05:40:59,409 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 828 transitions. Word has length 35 [2021-06-05 05:40:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:59,409 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 828 transitions. [2021-06-05 05:40:59,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:40:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 828 transitions. [2021-06-05 05:40:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:59,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:59,409 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:59,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:59,610 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:59,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:59,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1600337107, now seen corresponding path program 90 times [2021-06-05 05:40:59,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:59,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952010759] [2021-06-05 05:40:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:59,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:59,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952010759] [2021-06-05 05:40:59,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952010759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:59,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075568246] [2021-06-05 05:40:59,864 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:59,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:40:59,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:59,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:40:59,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:00,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075568246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:00,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:00,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:41:00,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581818504] [2021-06-05 05:41:00,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:41:00,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:00,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:41:00,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:00,361 INFO L87 Difference]: Start difference. First operand 388 states and 828 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:02,877 INFO L93 Difference]: Finished difference Result 635 states and 1250 transitions. [2021-06-05 05:41:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:41:02,878 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:41:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:02,878 INFO L225 Difference]: With dead ends: 635 [2021-06-05 05:41:02,878 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 05:41:02,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 2423.3ms TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 05:41:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 05:41:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 392. [2021-06-05 05:41:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.1381074168797953) internal successors, (836), 391 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 05:41:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 836 transitions. [2021-06-05 05:41:02,882 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 836 transitions. Word has length 35 [2021-06-05 05:41:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:02,883 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 836 transitions. [2021-06-05 05:41:02,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 836 transitions. [2021-06-05 05:41:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:41:02,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:02,883 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:03,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:03,084 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:03,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:03,084 INFO L82 PathProgramCache]: Analyzing trace with hash -767912591, now seen corresponding path program 91 times [2021-06-05 05:41:03,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:03,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127116147] [2021-06-05 05:41:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:03,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:03,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127116147] [2021-06-05 05:41:03,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127116147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:03,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813818363] [2021-06-05 05:41:03,439 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:03,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:41:03,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813818363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:03,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:03,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:41:03,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401880107] [2021-06-05 05:41:03,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:41:03,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:03,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:41:03,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:03,849 INFO L87 Difference]: Start difference. First operand 392 states and 836 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:06,274 INFO L93 Difference]: Finished difference Result 700 states and 1368 transitions. [2021-06-05 05:41:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:41:06,274 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:41:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:06,275 INFO L225 Difference]: With dead ends: 700 [2021-06-05 05:41:06,275 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 05:41:06,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 2361.1ms TimeCoverageRelationStatistics Valid=1195, Invalid=8705, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 05:41:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 05:41:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 394. [2021-06-05 05:41:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.1399491094147582) internal successors, (841), 393 states have internal predecessors, (841), 0 states have call successors, (0), 0 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 05:41:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 841 transitions. [2021-06-05 05:41:06,280 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 841 transitions. Word has length 35 [2021-06-05 05:41:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:06,280 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 841 transitions. [2021-06-05 05:41:06,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 841 transitions. [2021-06-05 05:41:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:41:06,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:06,280 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:06,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 05:41:06,481 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:06,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2032840451, now seen corresponding path program 92 times [2021-06-05 05:41:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:06,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801441423] [2021-06-05 05:41:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:06,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:06,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801441423] [2021-06-05 05:41:06,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801441423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:06,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793735576] [2021-06-05 05:41:06,776 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:06,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:06,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:06,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:41:06,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:07,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793735576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:07,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:07,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:41:07,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598569497] [2021-06-05 05:41:07,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:41:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:07,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:41:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:07,196 INFO L87 Difference]: Start difference. First operand 394 states and 841 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:09,287 INFO L93 Difference]: Finished difference Result 618 states and 1227 transitions. [2021-06-05 05:41:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:41:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:41:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:09,288 INFO L225 Difference]: With dead ends: 618 [2021-06-05 05:41:09,288 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 05:41:09,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 2155.1ms TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:41:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 05:41:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 382. [2021-06-05 05:41:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.120734908136483) internal successors, (808), 381 states have internal predecessors, (808), 0 states have call successors, (0), 0 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 05:41:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 808 transitions. [2021-06-05 05:41:09,292 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 808 transitions. Word has length 35 [2021-06-05 05:41:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:09,292 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 808 transitions. [2021-06-05 05:41:09,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 808 transitions. [2021-06-05 05:41:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:41:09,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:09,293 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:09,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:41:09,494 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1796284973, now seen corresponding path program 93 times [2021-06-05 05:41:09,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:09,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154424663] [2021-06-05 05:41:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:09,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:09,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154424663] [2021-06-05 05:41:09,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154424663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:09,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456404390] [2021-06-05 05:41:09,718 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:09,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:41:09,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:09,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 05:41:09,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:10,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456404390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:10,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:10,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:41:10,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945755059] [2021-06-05 05:41:10,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:41:10,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:10,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:41:10,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:10,148 INFO L87 Difference]: Start difference. First operand 382 states and 808 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:13,161 INFO L93 Difference]: Finished difference Result 714 states and 1421 transitions. [2021-06-05 05:41:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 05:41:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:41:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:13,162 INFO L225 Difference]: With dead ends: 714 [2021-06-05 05:41:13,162 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 05:41:13,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 2832.7ms TimeCoverageRelationStatistics Valid=1422, Invalid=10568, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 05:41:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 05:41:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 398. [2021-06-05 05:41:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.123425692695214) internal successors, (843), 397 states have internal predecessors, (843), 0 states have call successors, (0), 0 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 05:41:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 843 transitions. [2021-06-05 05:41:13,166 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 843 transitions. Word has length 35 [2021-06-05 05:41:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:13,167 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 843 transitions. [2021-06-05 05:41:13,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 843 transitions. [2021-06-05 05:41:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:41:13,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:13,167 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:13,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 05:41:13,368 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:13,368 INFO L82 PathProgramCache]: Analyzing trace with hash 531357113, now seen corresponding path program 94 times [2021-06-05 05:41:13,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:13,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196085504] [2021-06-05 05:41:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:13,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:13,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196085504] [2021-06-05 05:41:13,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196085504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:13,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502942131] [2021-06-05 05:41:13,591 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:13,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:13,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:13,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:41:13,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:14,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502942131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:14,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:14,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:41:14,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180488496] [2021-06-05 05:41:14,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:41:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:41:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:14,022 INFO L87 Difference]: Start difference. First operand 398 states and 843 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:16,687 INFO L93 Difference]: Finished difference Result 728 states and 1445 transitions. [2021-06-05 05:41:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:41:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2021-06-05 05:41:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:16,688 INFO L225 Difference]: With dead ends: 728 [2021-06-05 05:41:16,688 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 05:41:16,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 2434.1ms TimeCoverageRelationStatistics Valid=1275, Invalid=8427, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 05:41:16,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 05:41:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 365. [2021-06-05 05:41:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.0851648351648353) internal successors, (759), 364 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 05:41:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 759 transitions. [2021-06-05 05:41:16,693 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 759 transitions. Word has length 35 [2021-06-05 05:41:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:16,693 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 759 transitions. [2021-06-05 05:41:16,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 05:41:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 759 transitions. [2021-06-05 05:41:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:41:16,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:16,694 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:16,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:16,897 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash 850528961, now seen corresponding path program 95 times [2021-06-05 05:41:16,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:16,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776051663] [2021-06-05 05:41:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:17,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:17,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776051663] [2021-06-05 05:41:17,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776051663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:17,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975202639] [2021-06-05 05:41:17,206 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:17,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:41:17,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:17,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:41:17,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:17,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975202639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:17,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:17,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 05:41:17,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559205099] [2021-06-05 05:41:17,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:41:17,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:17,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:41:17,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:41:17,817 INFO L87 Difference]: Start difference. First operand 365 states and 759 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:41:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:21,577 INFO L93 Difference]: Finished difference Result 641 states and 1294 transitions. [2021-06-05 05:41:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 05:41:21,577 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 35 [2021-06-05 05:41:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:21,578 INFO L225 Difference]: With dead ends: 641 [2021-06-05 05:41:21,578 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 05:41:21,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3541.0ms TimeCoverageRelationStatistics Valid=1181, Invalid=8325, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 05:41:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 05:41:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 381. [2021-06-05 05:41:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.081578947368421) internal successors, (791), 380 states have internal predecessors, (791), 0 states have call successors, (0), 0 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 05:41:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 791 transitions. [2021-06-05 05:41:21,583 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 791 transitions. Word has length 35 [2021-06-05 05:41:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:21,583 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 791 transitions. [2021-06-05 05:41:21,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 05:41:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 791 transitions. [2021-06-05 05:41:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:41:21,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:21,584 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:21,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:21,797 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash 72244865, now seen corresponding path program 96 times [2021-06-05 05:41:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:21,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460182752] [2021-06-05 05:41:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:22,118 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-05 05:41:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:22,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:22,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460182752] [2021-06-05 05:41:22,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460182752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:22,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885487442] [2021-06-05 05:41:22,249 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:22,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:41:22,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:22,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:41:22,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:22,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885487442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:22,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:22,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 05:41:22,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744188665] [2021-06-05 05:41:22,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:41:22,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:41:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:41:22,730 INFO L87 Difference]: Start difference. First operand 381 states and 791 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:23,606 INFO L93 Difference]: Finished difference Result 540 states and 1106 transitions. [2021-06-05 05:41:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:41:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:41:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:23,607 INFO L225 Difference]: With dead ends: 540 [2021-06-05 05:41:23,607 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 05:41:23,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:41:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 05:41:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 385. [2021-06-05 05:41:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0807291666666665) internal successors, (799), 384 states have internal predecessors, (799), 0 states have call successors, (0), 0 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 05:41:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 799 transitions. [2021-06-05 05:41:23,611 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 799 transitions. Word has length 35 [2021-06-05 05:41:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:23,611 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 799 transitions. [2021-06-05 05:41:23,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 799 transitions. [2021-06-05 05:41:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:41:23,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:23,612 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:23,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 05:41:23,812 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash 428848235, now seen corresponding path program 97 times [2021-06-05 05:41:23,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:23,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924747947] [2021-06-05 05:41:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:41:23,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:23,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924747947] [2021-06-05 05:41:23,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924747947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:23,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986138222] [2021-06-05 05:41:23,868 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:41:23,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:41:23,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986138222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:23,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:23,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:41:23,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036191915] [2021-06-05 05:41:23,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:41:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:41:23,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:41:23,960 INFO L87 Difference]: Start difference. First operand 385 states and 799 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 05:41:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:24,073 INFO L93 Difference]: Finished difference Result 609 states and 1226 transitions. [2021-06-05 05:41:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:41:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 37 [2021-06-05 05:41:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:24,073 INFO L225 Difference]: With dead ends: 609 [2021-06-05 05:41:24,074 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 05:41:24,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:41:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 05:41:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 422. [2021-06-05 05:41:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0855106888361044) internal successors, (878), 421 states have internal predecessors, (878), 0 states have call successors, (0), 0 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 05:41:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 878 transitions. [2021-06-05 05:41:24,078 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 878 transitions. Word has length 37 [2021-06-05 05:41:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:24,078 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 878 transitions. [2021-06-05 05:41:24,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 05:41:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 878 transitions. [2021-06-05 05:41:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:41:24,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:24,078 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:24,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:24,279 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash 807325429, now seen corresponding path program 98 times [2021-06-05 05:41:24,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:24,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120506400] [2021-06-05 05:41:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:24,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:24,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120506400] [2021-06-05 05:41:24,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120506400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:24,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183270834] [2021-06-05 05:41:24,576 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:24,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:24,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:24,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:41:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:25,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183270834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:25,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:25,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-06-05 05:41:25,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133907066] [2021-06-05 05:41:25,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:41:25,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:25,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:41:25,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:41:25,120 INFO L87 Difference]: Start difference. First operand 422 states and 878 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:31,492 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 05:41:32,266 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 05:41:32,445 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 05:41:32,738 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 05:41:35,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:35,788 INFO L93 Difference]: Finished difference Result 1608 states and 3197 transitions. [2021-06-05 05:41:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-06-05 05:41:35,788 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:41:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:35,789 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 05:41:35,789 INFO L226 Difference]: Without dead ends: 1540 [2021-06-05 05:41:35,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15558 ImplicationChecksByTransitivity, 9711.5ms TimeCoverageRelationStatistics Valid=4687, Invalid=33533, Unknown=0, NotChecked=0, Total=38220 [2021-06-05 05:41:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-06-05 05:41:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 585. [2021-06-05 05:41:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1113013698630136) internal successors, (1233), 584 states have internal predecessors, (1233), 0 states have call successors, (0), 0 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 05:41:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1233 transitions. [2021-06-05 05:41:35,798 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1233 transitions. Word has length 37 [2021-06-05 05:41:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:35,799 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1233 transitions. [2021-06-05 05:41:35,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1233 transitions. [2021-06-05 05:41:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:41:35,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:35,800 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:36,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:36,013 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1398345563, now seen corresponding path program 99 times [2021-06-05 05:41:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:36,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576239195] [2021-06-05 05:41:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:41:36,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:36,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576239195] [2021-06-05 05:41:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576239195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:36,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521389072] [2021-06-05 05:41:36,285 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:36,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:41:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:36,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:41:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:36,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521389072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:36,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:36,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 05:41:36,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311004582] [2021-06-05 05:41:36,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:41:36,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:36,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:41:36,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:41:36,810 INFO L87 Difference]: Start difference. First operand 585 states and 1233 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 05:41:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:39,652 INFO L93 Difference]: Finished difference Result 965 states and 1949 transitions. [2021-06-05 05:41:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:41:39,653 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 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 37 [2021-06-05 05:41:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:39,654 INFO L225 Difference]: With dead ends: 965 [2021-06-05 05:41:39,654 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 05:41:39,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 2312.9ms TimeCoverageRelationStatistics Valid=660, Invalid=7350, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:41:39,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 05:41:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 576. [2021-06-05 05:41:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.1043478260869564) internal successors, (1210), 575 states have internal predecessors, (1210), 0 states have call successors, (0), 0 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 05:41:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1210 transitions. [2021-06-05 05:41:39,660 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1210 transitions. Word has length 37 [2021-06-05 05:41:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:39,660 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1210 transitions. [2021-06-05 05:41:39,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 05:41:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1210 transitions. [2021-06-05 05:41:39,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:41:39,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:39,661 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:39,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:41:39,861 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1584538635, now seen corresponding path program 100 times [2021-06-05 05:41:39,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:39,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278846568] [2021-06-05 05:41:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:41:40,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:40,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278846568] [2021-06-05 05:41:40,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278846568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:40,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628444596] [2021-06-05 05:41:40,064 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:40,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:40,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:40,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:41:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:40,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628444596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:40,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:40,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-06-05 05:41:40,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013038852] [2021-06-05 05:41:40,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:41:40,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:40,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:41:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:40,541 INFO L87 Difference]: Start difference. First operand 576 states and 1210 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:41,563 INFO L93 Difference]: Finished difference Result 810 states and 1676 transitions. [2021-06-05 05:41:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:41:41,563 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:41:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:41,564 INFO L225 Difference]: With dead ends: 810 [2021-06-05 05:41:41,564 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 05:41:41,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:41:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 05:41:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 536. [2021-06-05 05:41:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 2.1121495327102804) internal successors, (1130), 535 states have internal predecessors, (1130), 0 states have call successors, (0), 0 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 05:41:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1130 transitions. [2021-06-05 05:41:41,571 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1130 transitions. Word has length 37 [2021-06-05 05:41:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:41,571 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1130 transitions. [2021-06-05 05:41:41,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1130 transitions. [2021-06-05 05:41:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:41:41,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:41,572 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:41,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 05:41:41,785 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:41,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1136264889, now seen corresponding path program 101 times [2021-06-05 05:41:41,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:41,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743888902] [2021-06-05 05:41:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:42,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:42,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743888902] [2021-06-05 05:41:42,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743888902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:42,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849368801] [2021-06-05 05:41:42,045 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:42,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:41:42,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:42,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:41:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:42,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849368801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:42,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:42,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-06-05 05:41:42,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847728848] [2021-06-05 05:41:42,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:41:42,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:42,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:41:42,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:41:42,559 INFO L87 Difference]: Start difference. First operand 536 states and 1130 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:48,254 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 05:41:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:49,769 INFO L93 Difference]: Finished difference Result 1533 states and 3130 transitions. [2021-06-05 05:41:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-06-05 05:41:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:41:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:49,770 INFO L225 Difference]: With dead ends: 1533 [2021-06-05 05:41:49,770 INFO L226 Difference]: Without dead ends: 1494 [2021-06-05 05:41:49,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8152 ImplicationChecksByTransitivity, 6524.4ms TimeCoverageRelationStatistics Valid=2594, Invalid=18868, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 05:41:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-06-05 05:41:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 599. [2021-06-05 05:41:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.100334448160535) internal successors, (1256), 598 states have internal predecessors, (1256), 0 states have call successors, (0), 0 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 05:41:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1256 transitions. [2021-06-05 05:41:49,778 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1256 transitions. Word has length 37 [2021-06-05 05:41:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:49,778 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1256 transitions. [2021-06-05 05:41:49,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1256 transitions. [2021-06-05 05:41:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:41:49,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:49,778 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:49,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 05:41:49,980 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 102 times [2021-06-05 05:41:49,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:49,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524572086] [2021-06-05 05:41:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:50,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:50,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524572086] [2021-06-05 05:41:50,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524572086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:50,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434128944] [2021-06-05 05:41:50,288 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:50,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:41:50,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:50,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:41:50,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:50,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434128944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:50,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:50,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:41:50,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400498782] [2021-06-05 05:41:50,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:41:50,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:50,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:41:50,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:41:50,762 INFO L87 Difference]: Start difference. First operand 599 states and 1256 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:52,904 INFO L93 Difference]: Finished difference Result 1197 states and 2449 transitions. [2021-06-05 05:41:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:41:52,905 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:41:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:52,906 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 05:41:52,906 INFO L226 Difference]: Without dead ends: 1130 [2021-06-05 05:41:52,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 2183.3ms TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:41:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-06-05 05:41:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 752. [2021-06-05 05:41:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.1757656458055927) internal successors, (1634), 751 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 05:41:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1634 transitions. [2021-06-05 05:41:52,913 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1634 transitions. Word has length 39 [2021-06-05 05:41:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:52,913 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 1634 transitions. [2021-06-05 05:41:52,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1634 transitions. [2021-06-05 05:41:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:41:52,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:52,914 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:53,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:53,115 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1236547937, now seen corresponding path program 103 times [2021-06-05 05:41:53,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:53,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640293143] [2021-06-05 05:41:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:53,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640293143] [2021-06-05 05:41:53,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640293143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309361579] [2021-06-05 05:41:53,397 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:53,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:41:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:53,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309361579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:53,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:53,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:41:53,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466960086] [2021-06-05 05:41:53,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:41:53,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:53,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:41:53,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:41:53,884 INFO L87 Difference]: Start difference. First operand 752 states and 1634 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:56,330 INFO L93 Difference]: Finished difference Result 1229 states and 2502 transitions. [2021-06-05 05:41:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:41:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:41:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:56,331 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 05:41:56,331 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 05:41:56,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 2264.8ms TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 05:41:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 05:41:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 754. [2021-06-05 05:41:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.1752988047808763) internal successors, (1638), 753 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 05:41:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1638 transitions. [2021-06-05 05:41:56,339 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1638 transitions. Word has length 39 [2021-06-05 05:41:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:56,339 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 1638 transitions. [2021-06-05 05:41:56,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1638 transitions. [2021-06-05 05:41:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:41:56,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:56,340 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:56,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 05:41:56,540 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash 907136483, now seen corresponding path program 104 times [2021-06-05 05:41:56,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:56,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190736330] [2021-06-05 05:41:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:56,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:56,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190736330] [2021-06-05 05:41:56,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190736330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:56,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604538407] [2021-06-05 05:41:56,825 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:56,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:56,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:56,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:41:56,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:57,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604538407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:57,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:57,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:41:57,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729682568] [2021-06-05 05:41:57,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:41:57,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:57,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:41:57,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:41:57,310 INFO L87 Difference]: Start difference. First operand 754 states and 1638 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:59,809 INFO L93 Difference]: Finished difference Result 1227 states and 2500 transitions. [2021-06-05 05:41:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 05:41:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:41:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:59,810 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 05:41:59,810 INFO L226 Difference]: Without dead ends: 1177 [2021-06-05 05:41:59,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 2394.6ms TimeCoverageRelationStatistics Valid=1311, Invalid=9609, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 05:41:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-05 05:41:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 756. [2021-06-05 05:41:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.174834437086093) internal successors, (1642), 755 states have internal predecessors, (1642), 0 states have call successors, (0), 0 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 05:41:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1642 transitions. [2021-06-05 05:41:59,818 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1642 transitions. Word has length 39 [2021-06-05 05:41:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:59,818 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1642 transitions. [2021-06-05 05:41:59,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1642 transitions. [2021-06-05 05:41:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:41:59,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:59,819 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:00,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 05:42:00,019 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1937298983, now seen corresponding path program 105 times [2021-06-05 05:42:00,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:00,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479299425] [2021-06-05 05:42:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:00,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:00,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479299425] [2021-06-05 05:42:00,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479299425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:00,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123449770] [2021-06-05 05:42:00,297 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:00,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:42:00,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:00,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:42:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:01,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123449770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:01,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:01,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:01,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719750877] [2021-06-05 05:42:01,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:01,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:01,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:01,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:01,014 INFO L87 Difference]: Start difference. First operand 756 states and 1642 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:05,011 INFO L93 Difference]: Finished difference Result 1231 states and 2510 transitions. [2021-06-05 05:42:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:42:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:05,012 INFO L225 Difference]: With dead ends: 1231 [2021-06-05 05:42:05,012 INFO L226 Difference]: Without dead ends: 1187 [2021-06-05 05:42:05,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4231 ImplicationChecksByTransitivity, 3624.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=13458, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 05:42:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-05 05:42:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 758. [2021-06-05 05:42:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.1743725231175692) internal successors, (1646), 757 states have internal predecessors, (1646), 0 states have call successors, (0), 0 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 05:42:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1646 transitions. [2021-06-05 05:42:05,020 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1646 transitions. Word has length 39 [2021-06-05 05:42:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:05,020 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 1646 transitions. [2021-06-05 05:42:05,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1646 transitions. [2021-06-05 05:42:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:05,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:05,021 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:05,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:05,222 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1261625493, now seen corresponding path program 106 times [2021-06-05 05:42:05,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:05,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647556745] [2021-06-05 05:42:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:05,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:05,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647556745] [2021-06-05 05:42:05,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647556745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:05,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331210457] [2021-06-05 05:42:05,512 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:05,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:05,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:05,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331210457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:05,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:05,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:05,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577876556] [2021-06-05 05:42:05,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:05,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:05,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:05,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:05,980 INFO L87 Difference]: Start difference. First operand 758 states and 1646 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:08,825 INFO L93 Difference]: Finished difference Result 1225 states and 2500 transitions. [2021-06-05 05:42:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 05:42:08,826 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:08,827 INFO L225 Difference]: With dead ends: 1225 [2021-06-05 05:42:08,827 INFO L226 Difference]: Without dead ends: 1187 [2021-06-05 05:42:08,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 2639.5ms TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 05:42:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-05 05:42:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 760. [2021-06-05 05:42:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.1739130434782608) internal successors, (1650), 759 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 05:42:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1650 transitions. [2021-06-05 05:42:08,834 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1650 transitions. Word has length 39 [2021-06-05 05:42:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:08,834 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 1650 transitions. [2021-06-05 05:42:08,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:08,834 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1650 transitions. [2021-06-05 05:42:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:08,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:08,835 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:09,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:09,036 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:09,037 INFO L82 PathProgramCache]: Analyzing trace with hash -429200977, now seen corresponding path program 107 times [2021-06-05 05:42:09,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:09,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002538599] [2021-06-05 05:42:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:09,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:09,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002538599] [2021-06-05 05:42:09,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002538599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:09,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30036456] [2021-06-05 05:42:09,359 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:09,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:42:09,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:09,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:09,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:09,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30036456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:09,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:09,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353667348] [2021-06-05 05:42:09,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:09,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:09,860 INFO L87 Difference]: Start difference. First operand 760 states and 1650 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:13,106 INFO L93 Difference]: Finished difference Result 1282 states and 2603 transitions. [2021-06-05 05:42:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 05:42:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:13,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:13,107 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 05:42:13,107 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 05:42:13,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 2959.4ms TimeCoverageRelationStatistics Valid=1736, Invalid=12306, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 05:42:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 05:42:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 763. [2021-06-05 05:42:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.1758530183727034) internal successors, (1658), 762 states have internal predecessors, (1658), 0 states have call successors, (0), 0 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 05:42:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1658 transitions. [2021-06-05 05:42:13,115 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1658 transitions. Word has length 39 [2021-06-05 05:42:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:13,115 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1658 transitions. [2021-06-05 05:42:13,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1658 transitions. [2021-06-05 05:42:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:13,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:13,116 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:13,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 05:42:13,316 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:13,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1694128837, now seen corresponding path program 108 times [2021-06-05 05:42:13,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:13,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830176014] [2021-06-05 05:42:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:13,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:13,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830176014] [2021-06-05 05:42:13,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830176014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:13,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148862372] [2021-06-05 05:42:13,651 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:13,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:42:13,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:13,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:42:13,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:14,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148862372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:14,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:14,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:14,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745053921] [2021-06-05 05:42:14,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:14,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:14,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:14,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:14,332 INFO L87 Difference]: Start difference. First operand 763 states and 1658 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:18,206 INFO L93 Difference]: Finished difference Result 1163 states and 2364 transitions. [2021-06-05 05:42:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 05:42:18,206 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:18,207 INFO L225 Difference]: With dead ends: 1163 [2021-06-05 05:42:18,207 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 05:42:18,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 3554.3ms TimeCoverageRelationStatistics Valid=1767, Invalid=12513, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:42:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 05:42:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 782. [2021-06-05 05:42:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.17797695262484) internal successors, (1701), 781 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 05:42:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1701 transitions. [2021-06-05 05:42:18,214 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1701 transitions. Word has length 39 [2021-06-05 05:42:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:18,214 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1701 transitions. [2021-06-05 05:42:18,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1701 transitions. [2021-06-05 05:42:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:18,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:18,215 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:18,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:18,416 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash 318889065, now seen corresponding path program 109 times [2021-06-05 05:42:18,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:18,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625268733] [2021-06-05 05:42:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:18,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:18,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625268733] [2021-06-05 05:42:18,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625268733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:18,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150412464] [2021-06-05 05:42:18,696 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:18,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:19,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150412464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:19,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:19,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:19,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255224702] [2021-06-05 05:42:19,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:19,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:19,176 INFO L87 Difference]: Start difference. First operand 782 states and 1701 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:21,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:21,383 INFO L93 Difference]: Finished difference Result 1209 states and 2470 transitions. [2021-06-05 05:42:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:42:21,383 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:21,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:21,384 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 05:42:21,384 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 05:42:21,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 2227.5ms TimeCoverageRelationStatistics Valid=1134, Invalid=8766, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 05:42:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 05:42:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 784. [2021-06-05 05:42:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.177522349936143) internal successors, (1705), 783 states have internal predecessors, (1705), 0 states have call successors, (0), 0 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 05:42:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1705 transitions. [2021-06-05 05:42:21,391 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1705 transitions. Word has length 39 [2021-06-05 05:42:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:21,391 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1705 transitions. [2021-06-05 05:42:21,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1705 transitions. [2021-06-05 05:42:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:21,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:21,392 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:21,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:21,593 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1349051565, now seen corresponding path program 110 times [2021-06-05 05:42:21,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:21,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583665288] [2021-06-05 05:42:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:21,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:21,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583665288] [2021-06-05 05:42:21,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583665288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:21,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472345318] [2021-06-05 05:42:21,868 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:21,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:21,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:21,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:21,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:22,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472345318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:22,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:22,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:22,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046157354] [2021-06-05 05:42:22,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:22,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:22,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:22,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:22,344 INFO L87 Difference]: Start difference. First operand 784 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:24,812 INFO L93 Difference]: Finished difference Result 1212 states and 2490 transitions. [2021-06-05 05:42:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 05:42:24,813 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:24,814 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 05:42:24,814 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 05:42:24,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 2328.4ms TimeCoverageRelationStatistics Valid=1265, Invalid=9655, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 05:42:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 05:42:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 794. [2021-06-05 05:42:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.1853720050441363) internal successors, (1733), 793 states have internal predecessors, (1733), 0 states have call successors, (0), 0 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 05:42:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1733 transitions. [2021-06-05 05:42:24,821 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1733 transitions. Word has length 39 [2021-06-05 05:42:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:24,821 INFO L482 AbstractCegarLoop]: Abstraction has 794 states and 1733 transitions. [2021-06-05 05:42:24,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1733 transitions. [2021-06-05 05:42:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:24,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:24,822 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:25,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 05:42:25,023 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1849872911, now seen corresponding path program 111 times [2021-06-05 05:42:25,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:25,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964143055] [2021-06-05 05:42:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:25,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:25,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964143055] [2021-06-05 05:42:25,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964143055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:25,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565519407] [2021-06-05 05:42:25,339 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:25,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:42:25,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:25,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:42:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:25,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565519407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:25,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:25,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:25,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661573942] [2021-06-05 05:42:25,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:25,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:25,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:25,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:25,986 INFO L87 Difference]: Start difference. First operand 794 states and 1733 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:29,399 INFO L93 Difference]: Finished difference Result 1224 states and 2528 transitions. [2021-06-05 05:42:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 05:42:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:29,400 INFO L225 Difference]: With dead ends: 1224 [2021-06-05 05:42:29,400 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 05:42:29,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 3231.6ms TimeCoverageRelationStatistics Valid=1462, Invalid=11878, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 05:42:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 05:42:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 804. [2021-06-05 05:42:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.1930261519302614) internal successors, (1761), 803 states have internal predecessors, (1761), 0 states have call successors, (0), 0 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 05:42:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1761 transitions. [2021-06-05 05:42:29,408 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1761 transitions. Word has length 39 [2021-06-05 05:42:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:29,408 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 1761 transitions. [2021-06-05 05:42:29,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1761 transitions. [2021-06-05 05:42:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:29,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:29,409 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:29,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 05:42:29,609 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:29,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1017448395, now seen corresponding path program 112 times [2021-06-05 05:42:29,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:29,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101513668] [2021-06-05 05:42:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:29,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:29,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101513668] [2021-06-05 05:42:29,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101513668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:29,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679411916] [2021-06-05 05:42:29,914 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:29,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:29,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:29,940 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:30,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679411916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:30,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:30,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:30,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179219417] [2021-06-05 05:42:30,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:30,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:30,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:30,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:30,393 INFO L87 Difference]: Start difference. First operand 804 states and 1761 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:33,277 INFO L93 Difference]: Finished difference Result 1310 states and 2688 transitions. [2021-06-05 05:42:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 05:42:33,277 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:33,278 INFO L225 Difference]: With dead ends: 1310 [2021-06-05 05:42:33,278 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 05:42:33,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3959 ImplicationChecksByTransitivity, 2768.3ms TimeCoverageRelationStatistics Valid=1571, Invalid=11311, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 05:42:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 05:42:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 808. [2021-06-05 05:42:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.195786864931846) internal successors, (1772), 807 states have internal predecessors, (1772), 0 states have call successors, (0), 0 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 05:42:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1772 transitions. [2021-06-05 05:42:33,286 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1772 transitions. Word has length 39 [2021-06-05 05:42:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:33,286 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 1772 transitions. [2021-06-05 05:42:33,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1772 transitions. [2021-06-05 05:42:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:33,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:33,287 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:33,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:33,497 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2012591041, now seen corresponding path program 113 times [2021-06-05 05:42:33,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:33,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351357438] [2021-06-05 05:42:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:33,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:33,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351357438] [2021-06-05 05:42:33,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351357438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:33,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847096715] [2021-06-05 05:42:33,804 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:33,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:42:33,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:33,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:33,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:34,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847096715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:34,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:34,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078733808] [2021-06-05 05:42:34,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:34,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:34,285 INFO L87 Difference]: Start difference. First operand 808 states and 1772 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:36,960 INFO L93 Difference]: Finished difference Result 1169 states and 2413 transitions. [2021-06-05 05:42:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:42:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:36,961 INFO L225 Difference]: With dead ends: 1169 [2021-06-05 05:42:36,961 INFO L226 Difference]: Without dead ends: 1142 [2021-06-05 05:42:36,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 2578.1ms TimeCoverageRelationStatistics Valid=1492, Invalid=9638, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 05:42:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-05 05:42:36,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 774. [2021-06-05 05:42:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.179818887451488) internal successors, (1685), 773 states have internal predecessors, (1685), 0 states have call successors, (0), 0 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 05:42:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1685 transitions. [2021-06-05 05:42:36,969 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1685 transitions. Word has length 39 [2021-06-05 05:42:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:36,969 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1685 transitions. [2021-06-05 05:42:36,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1685 transitions. [2021-06-05 05:42:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:36,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:36,970 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:37,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:37,170 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:37,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1299362665, now seen corresponding path program 114 times [2021-06-05 05:42:37,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:37,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627517332] [2021-06-05 05:42:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:37,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627517332] [2021-06-05 05:42:37,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627517332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244016828] [2021-06-05 05:42:37,456 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:37,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:42:37,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:37,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:42:37,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:37,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244016828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:37,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:37,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:37,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752871854] [2021-06-05 05:42:37,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:37,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:37,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:37,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:37,960 INFO L87 Difference]: Start difference. First operand 774 states and 1685 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:40,406 INFO L93 Difference]: Finished difference Result 1152 states and 2354 transitions. [2021-06-05 05:42:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 05:42:40,407 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:40,408 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 05:42:40,408 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 05:42:40,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 2440.0ms TimeCoverageRelationStatistics Valid=1243, Invalid=9887, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 05:42:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 05:42:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 776. [2021-06-05 05:42:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.1793548387096773) internal successors, (1689), 775 states have internal predecessors, (1689), 0 states have call successors, (0), 0 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 05:42:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1689 transitions. [2021-06-05 05:42:40,415 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1689 transitions. Word has length 39 [2021-06-05 05:42:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:40,415 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 1689 transitions. [2021-06-05 05:42:40,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1689 transitions. [2021-06-05 05:42:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:40,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:40,416 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:40,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:40,617 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:40,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1899561811, now seen corresponding path program 115 times [2021-06-05 05:42:40,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:40,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047815431] [2021-06-05 05:42:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:40,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:40,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047815431] [2021-06-05 05:42:40,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047815431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:40,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912796919] [2021-06-05 05:42:40,909 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:40,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:41,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912796919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:41,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:41,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:41,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022843165] [2021-06-05 05:42:41,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:41,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:41,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:41,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:41,391 INFO L87 Difference]: Start difference. First operand 776 states and 1689 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:43,902 INFO L93 Difference]: Finished difference Result 1157 states and 2374 transitions. [2021-06-05 05:42:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 05:42:43,902 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:43,903 INFO L225 Difference]: With dead ends: 1157 [2021-06-05 05:42:43,903 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 05:42:43,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 2520.7ms TimeCoverageRelationStatistics Valid=1411, Invalid=10799, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 05:42:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 05:42:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 782. [2021-06-05 05:42:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.183098591549296) internal successors, (1705), 781 states have internal predecessors, (1705), 0 states have call successors, (0), 0 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 05:42:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1705 transitions. [2021-06-05 05:42:43,910 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1705 transitions. Word has length 39 [2021-06-05 05:42:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:43,910 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1705 transitions. [2021-06-05 05:42:43,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1705 transitions. [2021-06-05 05:42:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:43,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:43,911 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:44,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 05:42:44,112 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:44,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1067137295, now seen corresponding path program 116 times [2021-06-05 05:42:44,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:44,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117579429] [2021-06-05 05:42:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:44,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:44,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117579429] [2021-06-05 05:42:44,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117579429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:44,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134342850] [2021-06-05 05:42:44,414 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:44,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:44,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:44,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:44,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134342850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:44,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:44,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:44,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248435774] [2021-06-05 05:42:44,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:44,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:44,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:44,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:44,895 INFO L87 Difference]: Start difference. First operand 782 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:47,837 INFO L93 Difference]: Finished difference Result 1249 states and 2546 transitions. [2021-06-05 05:42:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 05:42:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:47,838 INFO L225 Difference]: With dead ends: 1249 [2021-06-05 05:42:47,838 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 05:42:47,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4088 ImplicationChecksByTransitivity, 2811.7ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 05:42:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 05:42:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 786. [2021-06-05 05:42:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.1859872611464968) internal successors, (1716), 785 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 05:42:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1716 transitions. [2021-06-05 05:42:47,846 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1716 transitions. Word has length 39 [2021-06-05 05:42:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:47,846 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1716 transitions. [2021-06-05 05:42:47,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1716 transitions. [2021-06-05 05:42:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:47,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:47,847 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:48,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 05:42:48,047 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:48,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1962902141, now seen corresponding path program 117 times [2021-06-05 05:42:48,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:48,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333671628] [2021-06-05 05:42:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:48,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:48,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333671628] [2021-06-05 05:42:48,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333671628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:48,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309482511] [2021-06-05 05:42:48,405 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:48,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:42:48,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:48,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:42:48,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:49,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309482511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:49,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:49,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:49,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727451373] [2021-06-05 05:42:49,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:49,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:49,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:49,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:49,158 INFO L87 Difference]: Start difference. First operand 786 states and 1716 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:53,209 INFO L93 Difference]: Finished difference Result 1162 states and 2375 transitions. [2021-06-05 05:42:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 05:42:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:53,211 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 05:42:53,211 INFO L226 Difference]: Without dead ends: 1121 [2021-06-05 05:42:53,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 3955.4ms TimeCoverageRelationStatistics Valid=1607, Invalid=12673, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:42:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-05 05:42:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 604. [2021-06-05 05:42:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.1160862354892207) internal successors, (1276), 603 states have internal predecessors, (1276), 0 states have call successors, (0), 0 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 05:42:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1276 transitions. [2021-06-05 05:42:53,217 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1276 transitions. Word has length 39 [2021-06-05 05:42:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:53,217 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1276 transitions. [2021-06-05 05:42:53,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1276 transitions. [2021-06-05 05:42:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:53,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:53,218 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:53,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:53,418 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1278036585, now seen corresponding path program 118 times [2021-06-05 05:42:53,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:53,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746956397] [2021-06-05 05:42:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:53,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746956397] [2021-06-05 05:42:53,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746956397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374530846] [2021-06-05 05:42:53,688 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:53,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:53,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:53,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:54,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374530846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:54,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:54,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:54,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517395232] [2021-06-05 05:42:54,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:54,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:54,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:54,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:54,208 INFO L87 Difference]: Start difference. First operand 604 states and 1276 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:56,818 INFO L93 Difference]: Finished difference Result 922 states and 1823 transitions. [2021-06-05 05:42:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 05:42:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:42:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:56,819 INFO L225 Difference]: With dead ends: 922 [2021-06-05 05:42:56,819 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 05:42:56,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2576.3ms TimeCoverageRelationStatistics Valid=1385, Invalid=11047, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 05:42:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 05:42:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 606. [2021-06-05 05:42:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.115702479338843) internal successors, (1280), 605 states have internal predecessors, (1280), 0 states have call successors, (0), 0 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 05:42:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1280 transitions. [2021-06-05 05:42:56,825 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1280 transitions. Word has length 39 [2021-06-05 05:42:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:56,825 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1280 transitions. [2021-06-05 05:42:56,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1280 transitions. [2021-06-05 05:42:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:42:56,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:56,826 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:57,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-06-05 05:42:57,026 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2110461101, now seen corresponding path program 119 times [2021-06-05 05:42:57,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:57,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957076274] [2021-06-05 05:42:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:57,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:57,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957076274] [2021-06-05 05:42:57,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957076274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:57,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71912873] [2021-06-05 05:42:57,335 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:57,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:42:57,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:57,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:42:57,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:57,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71912873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:57,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:57,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:42:57,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786100847] [2021-06-05 05:42:57,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:57,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:57,831 INFO L87 Difference]: Start difference. First operand 606 states and 1280 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:00,751 INFO L93 Difference]: Finished difference Result 1010 states and 1983 transitions. [2021-06-05 05:43:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 05:43:00,752 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:43:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:00,752 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 05:43:00,752 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 05:43:00,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4228 ImplicationChecksByTransitivity, 2841.3ms TimeCoverageRelationStatistics Valid=1571, Invalid=11769, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 05:43:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 05:43:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 608. [2021-06-05 05:43:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 2.116968698517298) internal successors, (1285), 607 states have internal predecessors, (1285), 0 states have call successors, (0), 0 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 05:43:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1285 transitions. [2021-06-05 05:43:00,758 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1285 transitions. Word has length 39 [2021-06-05 05:43:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:00,759 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1285 transitions. [2021-06-05 05:43:00,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1285 transitions. [2021-06-05 05:43:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:43:00,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:00,759 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:00,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 05:43:00,960 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash 845533241, now seen corresponding path program 120 times [2021-06-05 05:43:00,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:00,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332557067] [2021-06-05 05:43:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:01,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:01,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332557067] [2021-06-05 05:43:01,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332557067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:01,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147244546] [2021-06-05 05:43:01,263 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:01,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:43:01,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:01,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:43:01,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:01,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147244546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:01,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:01,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:43:01,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887400433] [2021-06-05 05:43:01,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:43:01,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:43:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:43:01,859 INFO L87 Difference]: Start difference. First operand 608 states and 1285 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:05,360 INFO L93 Difference]: Finished difference Result 1026 states and 2029 transitions. [2021-06-05 05:43:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 05:43:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:43:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:05,361 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 05:43:05,361 INFO L226 Difference]: Without dead ends: 978 [2021-06-05 05:43:05,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 3196.4ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 05:43:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-06-05 05:43:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 595. [2021-06-05 05:43:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.1026936026936025) internal successors, (1249), 594 states have internal predecessors, (1249), 0 states have call successors, (0), 0 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 05:43:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1249 transitions. [2021-06-05 05:43:05,367 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1249 transitions. Word has length 39 [2021-06-05 05:43:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:05,367 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1249 transitions. [2021-06-05 05:43:05,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1249 transitions. [2021-06-05 05:43:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:43:05,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:05,368 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:05,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:05,568 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash 379691369, now seen corresponding path program 121 times [2021-06-05 05:43:05,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:05,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627537870] [2021-06-05 05:43:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:05,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:05,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627537870] [2021-06-05 05:43:05,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627537870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:05,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275334923] [2021-06-05 05:43:05,810 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:05,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:43:05,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:06,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275334923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:06,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:06,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:43:06,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890235668] [2021-06-05 05:43:06,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:43:06,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:06,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:43:06,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:43:06,288 INFO L87 Difference]: Start difference. First operand 595 states and 1249 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:09,707 INFO L93 Difference]: Finished difference Result 1028 states and 2059 transitions. [2021-06-05 05:43:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 05:43:09,707 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:43:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:09,708 INFO L225 Difference]: With dead ends: 1028 [2021-06-05 05:43:09,708 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 05:43:09,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5278 ImplicationChecksByTransitivity, 3215.7ms TimeCoverageRelationStatistics Valid=1778, Invalid=13972, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 05:43:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 05:43:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 605. [2021-06-05 05:43:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.1009933774834435) internal successors, (1269), 604 states have internal predecessors, (1269), 0 states have call successors, (0), 0 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 05:43:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1269 transitions. [2021-06-05 05:43:09,714 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1269 transitions. Word has length 39 [2021-06-05 05:43:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:09,715 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1269 transitions. [2021-06-05 05:43:09,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1269 transitions. [2021-06-05 05:43:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:43:09,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:09,715 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:09,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 05:43:09,916 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash -115557073, now seen corresponding path program 122 times [2021-06-05 05:43:09,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:09,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838026718] [2021-06-05 05:43:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:43:10,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838026718] [2021-06-05 05:43:10,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838026718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061703233] [2021-06-05 05:43:10,141 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:10,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:10,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:10,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:43:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:10,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061703233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:10,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:10,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-05 05:43:10,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23623232] [2021-06-05 05:43:10,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:43:10,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:43:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:43:10,619 INFO L87 Difference]: Start difference. First operand 605 states and 1269 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:13,572 INFO L93 Difference]: Finished difference Result 1122 states and 2231 transitions. [2021-06-05 05:43:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 05:43:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:43:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:13,573 INFO L225 Difference]: With dead ends: 1122 [2021-06-05 05:43:13,573 INFO L226 Difference]: Without dead ends: 1043 [2021-06-05 05:43:13,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 2772.2ms TimeCoverageRelationStatistics Valid=1670, Invalid=11902, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 05:43:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-06-05 05:43:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 576. [2021-06-05 05:43:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 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 05:43:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-06-05 05:43:13,579 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 39 [2021-06-05 05:43:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:13,579 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-06-05 05:43:13,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-06-05 05:43:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:43:13,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:13,580 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:13,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:13,780 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:13,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2015955197, now seen corresponding path program 123 times [2021-06-05 05:43:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:13,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107225885] [2021-06-05 05:43:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:14,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:14,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107225885] [2021-06-05 05:43:14,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107225885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:14,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982662352] [2021-06-05 05:43:14,081 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:14,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:43:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:14,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:43:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:14,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982662352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:14,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:14,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-06-05 05:43:14,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213562891] [2021-06-05 05:43:14,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:43:14,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:43:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:43:14,724 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 05:43:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:19,713 INFO L93 Difference]: Finished difference Result 956 states and 1931 transitions. [2021-06-05 05:43:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 05:43:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 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 39 [2021-06-05 05:43:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:19,714 INFO L225 Difference]: With dead ends: 956 [2021-06-05 05:43:19,714 INFO L226 Difference]: Without dead ends: 917 [2021-06-05 05:43:19,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 4549.3ms TimeCoverageRelationStatistics Valid=1504, Invalid=12776, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:43:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-06-05 05:43:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 508. [2021-06-05 05:43:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.078895463510848) internal successors, (1054), 507 states have internal predecessors, (1054), 0 states have call successors, (0), 0 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 05:43:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1054 transitions. [2021-06-05 05:43:19,719 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1054 transitions. Word has length 39 [2021-06-05 05:43:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:19,719 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1054 transitions. [2021-06-05 05:43:19,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 05:43:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1054 transitions. [2021-06-05 05:43:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:43:19,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:19,720 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:19,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 05:43:19,920 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash 963177715, now seen corresponding path program 124 times [2021-06-05 05:43:19,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:19,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956572356] [2021-06-05 05:43:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:20,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:20,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956572356] [2021-06-05 05:43:20,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956572356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:20,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199636698] [2021-06-05 05:43:20,258 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:20,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:20,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:20,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:43:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:20,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199636698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:20,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:20,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-06-05 05:43:20,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888515017] [2021-06-05 05:43:20,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:43:20,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:43:20,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:43:20,868 INFO L87 Difference]: Start difference. First operand 508 states and 1054 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:22,329 INFO L93 Difference]: Finished difference Result 1041 states and 2115 transitions. [2021-06-05 05:43:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:43:22,329 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:43:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:22,330 INFO L225 Difference]: With dead ends: 1041 [2021-06-05 05:43:22,330 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 05:43:22,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1323.2ms TimeCoverageRelationStatistics Valid=262, Invalid=3160, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:43:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 05:43:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 524. [2021-06-05 05:43:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.0764818355640537) internal successors, (1086), 523 states have internal predecessors, (1086), 0 states have call successors, (0), 0 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 05:43:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1086 transitions. [2021-06-05 05:43:22,336 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1086 transitions. Word has length 39 [2021-06-05 05:43:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:22,336 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1086 transitions. [2021-06-05 05:43:22,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:22,336 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1086 transitions. [2021-06-05 05:43:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:43:22,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:22,336 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:22,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:22,537 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -892338777, now seen corresponding path program 125 times [2021-06-05 05:43:22,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:22,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121393287] [2021-06-05 05:43:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:43:22,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:22,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121393287] [2021-06-05 05:43:22,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121393287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:22,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407946569] [2021-06-05 05:43:22,604 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:22,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:43:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:43:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:43:22,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407946569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:22,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:22,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:43:22,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320286546] [2021-06-05 05:43:22,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:43:22,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:22,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:43:22,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:43:22,695 INFO L87 Difference]: Start difference. First operand 524 states and 1086 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:43:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:22,842 INFO L93 Difference]: Finished difference Result 816 states and 1639 transitions. [2021-06-05 05:43:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:43:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:43:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:22,843 INFO L225 Difference]: With dead ends: 816 [2021-06-05 05:43:22,843 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 05:43:22,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:43:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 05:43:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-06-05 05:43:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.08273381294964) internal successors, (1158), 556 states have internal predecessors, (1158), 0 states have call successors, (0), 0 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 05:43:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1158 transitions. [2021-06-05 05:43:22,847 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1158 transitions. Word has length 41 [2021-06-05 05:43:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:22,847 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1158 transitions. [2021-06-05 05:43:22,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 05:43:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1158 transitions. [2021-06-05 05:43:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:43:22,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:22,848 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:23,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 05:43:23,051 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:23,051 INFO L82 PathProgramCache]: Analyzing trace with hash 141760501, now seen corresponding path program 126 times [2021-06-05 05:43:23,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:23,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061413757] [2021-06-05 05:43:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:23,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:23,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061413757] [2021-06-05 05:43:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061413757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:23,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609253696] [2021-06-05 05:43:23,415 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:23,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:43:23,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:23,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:43:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:24,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609253696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:24,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:24,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-05 05:43:24,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112445875] [2021-06-05 05:43:24,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:43:24,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:24,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:43:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:43:24,037 INFO L87 Difference]: Start difference. First operand 557 states and 1158 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:31,481 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 05:43:33,035 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 05:43:33,202 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 05:43:33,350 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 05:43:34,503 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 05:43:34,719 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 05:43:34,869 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 05:43:35,068 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 05:43:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:41,867 INFO L93 Difference]: Finished difference Result 2491 states and 4951 transitions. [2021-06-05 05:43:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2021-06-05 05:43:41,867 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:43:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:41,869 INFO L225 Difference]: With dead ends: 2491 [2021-06-05 05:43:41,869 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 05:43:41,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32989 ImplicationChecksByTransitivity, 15394.5ms TimeCoverageRelationStatistics Valid=8903, Invalid=67549, Unknown=0, NotChecked=0, Total=76452 [2021-06-05 05:43:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 05:43:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 830. [2021-06-05 05:43:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.1049457177322073) internal successors, (1745), 829 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 05:43:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1745 transitions. [2021-06-05 05:43:41,883 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1745 transitions. Word has length 41 [2021-06-05 05:43:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:41,883 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 1745 transitions. [2021-06-05 05:43:41,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1745 transitions. [2021-06-05 05:43:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:43:41,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:41,884 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:42,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:42,089 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:42,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2063910491, now seen corresponding path program 127 times [2021-06-05 05:43:42,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:42,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424690431] [2021-06-05 05:43:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:43:42,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:42,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424690431] [2021-06-05 05:43:42,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424690431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:42,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095774496] [2021-06-05 05:43:42,352 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:42,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:43:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:42,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095774496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:42,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:42,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-06-05 05:43:42,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118888123] [2021-06-05 05:43:42,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:43:42,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:42,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:43:42,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:43:42,957 INFO L87 Difference]: Start difference. First operand 830 states and 1745 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 05:43:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:45,657 INFO L93 Difference]: Finished difference Result 1299 states and 2636 transitions. [2021-06-05 05:43:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 05:43:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:43:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:45,658 INFO L225 Difference]: With dead ends: 1299 [2021-06-05 05:43:45,658 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 05:43:45,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 2559.7ms TimeCoverageRelationStatistics Valid=743, Invalid=9969, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 05:43:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 05:43:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 857. [2021-06-05 05:43:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.100467289719626) internal successors, (1798), 856 states have internal predecessors, (1798), 0 states have call successors, (0), 0 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 05:43:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1798 transitions. [2021-06-05 05:43:45,667 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1798 transitions. Word has length 41 [2021-06-05 05:43:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:45,667 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 1798 transitions. [2021-06-05 05:43:45,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 05:43:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1798 transitions. [2021-06-05 05:43:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:43:45,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:45,668 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:45,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 05:43:45,869 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:45,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:45,869 INFO L82 PathProgramCache]: Analyzing trace with hash -670644875, now seen corresponding path program 128 times [2021-06-05 05:43:45,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:45,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140579745] [2021-06-05 05:43:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:43:46,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:46,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140579745] [2021-06-05 05:43:46,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140579745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:46,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833213905] [2021-06-05 05:43:46,109 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:46,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:46,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:43:46,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:46,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833213905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:46,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:46,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 05:43:46,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391119265] [2021-06-05 05:43:46,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:43:46,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:46,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:43:46,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:43:46,703 INFO L87 Difference]: Start difference. First operand 857 states and 1798 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 05:43:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:49,155 INFO L93 Difference]: Finished difference Result 1376 states and 2792 transitions. [2021-06-05 05:43:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:43:49,155 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:43:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:49,156 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 05:43:49,157 INFO L226 Difference]: Without dead ends: 1337 [2021-06-05 05:43:49,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 2151.4ms TimeCoverageRelationStatistics Valid=666, Invalid=7890, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 05:43:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-06-05 05:43:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 848. [2021-06-05 05:43:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 2.0968122786304604) internal successors, (1776), 847 states have internal predecessors, (1776), 0 states have call successors, (0), 0 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 05:43:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1776 transitions. [2021-06-05 05:43:49,164 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1776 transitions. Word has length 41 [2021-06-05 05:43:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:49,164 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 1776 transitions. [2021-06-05 05:43:49,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 05:43:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1776 transitions. [2021-06-05 05:43:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:43:49,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:49,165 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:49,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:49,366 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:49,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:49,366 INFO L82 PathProgramCache]: Analyzing trace with hash 34337835, now seen corresponding path program 129 times [2021-06-05 05:43:49,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:49,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804494924] [2021-06-05 05:43:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:43:49,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:49,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804494924] [2021-06-05 05:43:49,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804494924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:49,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288330446] [2021-06-05 05:43:49,639 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:49,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:43:49,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:49,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:43:49,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:50,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288330446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:50,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:50,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-05 05:43:50,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952929081] [2021-06-05 05:43:50,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:43:50,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:50,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:43:50,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:43:50,191 INFO L87 Difference]: Start difference. First operand 848 states and 1776 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:52,586 INFO L93 Difference]: Finished difference Result 1147 states and 2347 transitions. [2021-06-05 05:43:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:43:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:43:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:52,587 INFO L225 Difference]: With dead ends: 1147 [2021-06-05 05:43:52,587 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 05:43:52,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 2085.1ms TimeCoverageRelationStatistics Valid=561, Invalid=7449, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:43:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 05:43:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 744. [2021-06-05 05:43:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.1049798115746974) internal successors, (1564), 743 states have internal predecessors, (1564), 0 states have call successors, (0), 0 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 05:43:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1564 transitions. [2021-06-05 05:43:52,596 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1564 transitions. Word has length 41 [2021-06-05 05:43:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:52,596 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 1564 transitions. [2021-06-05 05:43:52,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1564 transitions. [2021-06-05 05:43:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:43:52,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:52,597 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:52,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 05:43:52,813 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -749611727, now seen corresponding path program 130 times [2021-06-05 05:43:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:52,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382072700] [2021-06-05 05:43:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:43:53,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382072700] [2021-06-05 05:43:53,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382072700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835617241] [2021-06-05 05:43:53,115 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:53,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:53,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:53,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:43:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:53,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835617241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:53,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:53,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 05:43:53,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845887281] [2021-06-05 05:43:53,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:43:53,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:53,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:43:53,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:43:53,661 INFO L87 Difference]: Start difference. First operand 744 states and 1564 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:55,021 INFO L93 Difference]: Finished difference Result 1254 states and 2587 transitions. [2021-06-05 05:43:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:43:55,021 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:43:55,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:55,022 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 05:43:55,022 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 05:43:55,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1311.3ms TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:43:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 05:43:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 653. [2021-06-05 05:43:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.1165644171779143) internal successors, (1380), 652 states have internal predecessors, (1380), 0 states have call successors, (0), 0 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 05:43:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1380 transitions. [2021-06-05 05:43:55,029 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1380 transitions. Word has length 41 [2021-06-05 05:43:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:55,029 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1380 transitions. [2021-06-05 05:43:55,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1380 transitions. [2021-06-05 05:43:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:43:55,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:55,030 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:55,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:55,230 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2073348345, now seen corresponding path program 131 times [2021-06-05 05:43:55,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:55,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535924577] [2021-06-05 05:43:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:55,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:55,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535924577] [2021-06-05 05:43:55,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535924577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:55,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871007297] [2021-06-05 05:43:55,502 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:55,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:43:55,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:55,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:43:55,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:56,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871007297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:56,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:56,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2021-06-05 05:43:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545836927] [2021-06-05 05:43:56,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:43:56,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:56,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:43:56,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:43:56,092 INFO L87 Difference]: Start difference. First operand 653 states and 1380 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:02,647 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 05:44:06,664 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 05:44:07,340 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-06-05 05:44:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:08,696 INFO L93 Difference]: Finished difference Result 2177 states and 4455 transitions. [2021-06-05 05:44:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-06-05 05:44:08,697 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:44:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:08,699 INFO L225 Difference]: With dead ends: 2177 [2021-06-05 05:44:08,699 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 05:44:08,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17707 ImplicationChecksByTransitivity, 11005.9ms TimeCoverageRelationStatistics Valid=4996, Invalid=38894, Unknown=0, NotChecked=0, Total=43890 [2021-06-05 05:44:08,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 05:44:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 701. [2021-06-05 05:44:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.1085714285714285) internal successors, (1476), 700 states have internal predecessors, (1476), 0 states have call successors, (0), 0 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 05:44:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1476 transitions. [2021-06-05 05:44:08,709 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1476 transitions. Word has length 41 [2021-06-05 05:44:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:08,709 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 1476 transitions. [2021-06-05 05:44:08,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1476 transitions. [2021-06-05 05:44:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:08,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:08,710 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:08,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 05:44:08,910 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 132 times [2021-06-05 05:44:08,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:08,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408427350] [2021-06-05 05:44:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:09,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:09,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408427350] [2021-06-05 05:44:09,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408427350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:09,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130804549] [2021-06-05 05:44:09,242 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:09,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:44:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:09,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 05:44:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:09,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130804549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:09,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:09,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:09,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231538266] [2021-06-05 05:44:09,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:09,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:09,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:09,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:09,936 INFO L87 Difference]: Start difference. First operand 701 states and 1476 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:12,662 INFO L93 Difference]: Finished difference Result 1425 states and 2940 transitions. [2021-06-05 05:44:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 05:44:12,663 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:12,664 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 05:44:12,664 INFO L226 Difference]: Without dead ends: 1352 [2021-06-05 05:44:12,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 2878.6ms TimeCoverageRelationStatistics Valid=1356, Invalid=9564, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 05:44:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-06-05 05:44:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 879. [2021-06-05 05:44:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.1890660592255125) internal successors, (1922), 878 states have internal predecessors, (1922), 0 states have call successors, (0), 0 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 05:44:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1922 transitions. [2021-06-05 05:44:12,676 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1922 transitions. Word has length 43 [2021-06-05 05:44:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:12,676 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 1922 transitions. [2021-06-05 05:44:12,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1922 transitions. [2021-06-05 05:44:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:12,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:12,677 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:12,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-05 05:44:12,893 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1027861339, now seen corresponding path program 133 times [2021-06-05 05:44:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:12,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772735023] [2021-06-05 05:44:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:13,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:13,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772735023] [2021-06-05 05:44:13,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772735023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:13,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059916716] [2021-06-05 05:44:13,202 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:13,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:13,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:13,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059916716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:13,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:13,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373800629] [2021-06-05 05:44:13,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:13,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:13,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:13,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:13,759 INFO L87 Difference]: Start difference. First operand 879 states and 1922 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:16,388 INFO L93 Difference]: Finished difference Result 1463 states and 3003 transitions. [2021-06-05 05:44:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 05:44:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:16,390 INFO L225 Difference]: With dead ends: 1463 [2021-06-05 05:44:16,390 INFO L226 Difference]: Without dead ends: 1401 [2021-06-05 05:44:16,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 2597.5ms TimeCoverageRelationStatistics Valid=1457, Invalid=10533, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 05:44:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-05 05:44:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 881. [2021-06-05 05:44:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1886363636363635) internal successors, (1926), 880 states have internal predecessors, (1926), 0 states have call successors, (0), 0 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 05:44:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1926 transitions. [2021-06-05 05:44:16,399 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1926 transitions. Word has length 43 [2021-06-05 05:44:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:16,399 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1926 transitions. [2021-06-05 05:44:16,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1926 transitions. [2021-06-05 05:44:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:16,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:16,400 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:16,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 05:44:16,601 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash -475713121, now seen corresponding path program 134 times [2021-06-05 05:44:16,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:16,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959661343] [2021-06-05 05:44:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:16,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:16,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959661343] [2021-06-05 05:44:16,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959661343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:16,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023679552] [2021-06-05 05:44:16,910 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:16,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:16,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:16,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:17,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023679552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:17,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:17,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:17,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258486885] [2021-06-05 05:44:17,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:17,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:17,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:17,460 INFO L87 Difference]: Start difference. First operand 881 states and 1926 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:20,361 INFO L93 Difference]: Finished difference Result 1461 states and 3001 transitions. [2021-06-05 05:44:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 05:44:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:20,363 INFO L225 Difference]: With dead ends: 1461 [2021-06-05 05:44:20,363 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 05:44:20,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2734.7ms TimeCoverageRelationStatistics Valid=1554, Invalid=11556, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 05:44:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 05:44:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 883. [2021-06-05 05:44:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 2.188208616780045) internal successors, (1930), 882 states have internal predecessors, (1930), 0 states have call successors, (0), 0 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 05:44:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1930 transitions. [2021-06-05 05:44:20,372 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1930 transitions. Word has length 43 [2021-06-05 05:44:20,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:20,372 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 1930 transitions. [2021-06-05 05:44:20,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1930 transitions. [2021-06-05 05:44:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:20,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:20,373 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:20,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 05:44:20,573 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1667971299, now seen corresponding path program 135 times [2021-06-05 05:44:20,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:20,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185914130] [2021-06-05 05:44:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:20,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:20,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185914130] [2021-06-05 05:44:20,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185914130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:20,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793895947] [2021-06-05 05:44:20,884 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:20,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:44:20,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:20,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:20,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:21,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793895947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:21,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:21,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:21,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899777129] [2021-06-05 05:44:21,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:21,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:21,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:21,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:21,440 INFO L87 Difference]: Start difference. First operand 883 states and 1930 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:24,394 INFO L93 Difference]: Finished difference Result 1459 states and 2999 transitions. [2021-06-05 05:44:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 05:44:24,394 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:24,395 INFO L225 Difference]: With dead ends: 1459 [2021-06-05 05:44:24,395 INFO L226 Difference]: Without dead ends: 1409 [2021-06-05 05:44:24,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 2860.6ms TimeCoverageRelationStatistics Valid=1676, Invalid=12604, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:44:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-06-05 05:44:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 885. [2021-06-05 05:44:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.1877828054298645) internal successors, (1934), 884 states have internal predecessors, (1934), 0 states have call successors, (0), 0 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 05:44:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1934 transitions. [2021-06-05 05:44:24,404 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1934 transitions. Word has length 43 [2021-06-05 05:44:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:24,404 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1934 transitions. [2021-06-05 05:44:24,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1934 transitions. [2021-06-05 05:44:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:24,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:24,405 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:24,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 05:44:24,606 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1596833497, now seen corresponding path program 136 times [2021-06-05 05:44:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:24,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608945054] [2021-06-05 05:44:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:24,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:24,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608945054] [2021-06-05 05:44:24,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608945054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:24,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981958975] [2021-06-05 05:44:24,921 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:24,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:24,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:24,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:25,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981958975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:25,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:25,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:25,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824238774] [2021-06-05 05:44:25,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:25,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:25,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:25,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:25,468 INFO L87 Difference]: Start difference. First operand 885 states and 1934 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:28,646 INFO L93 Difference]: Finished difference Result 1457 states and 2997 transitions. [2021-06-05 05:44:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 05:44:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:28,648 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 05:44:28,648 INFO L226 Difference]: Without dead ends: 1413 [2021-06-05 05:44:28,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 2988.1ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 05:44:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-05 05:44:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 887. [2021-06-05 05:44:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.1873589164785554) internal successors, (1938), 886 states have internal predecessors, (1938), 0 states have call successors, (0), 0 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 05:44:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1938 transitions. [2021-06-05 05:44:28,657 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1938 transitions. Word has length 43 [2021-06-05 05:44:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:28,657 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 1938 transitions. [2021-06-05 05:44:28,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1938 transitions. [2021-06-05 05:44:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:28,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:28,658 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:28,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 05:44:28,858 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:28,859 INFO L82 PathProgramCache]: Analyzing trace with hash -500790677, now seen corresponding path program 137 times [2021-06-05 05:44:28,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:28,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265354278] [2021-06-05 05:44:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:29,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:29,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265354278] [2021-06-05 05:44:29,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265354278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:29,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930690559] [2021-06-05 05:44:29,168 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:29,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:44:29,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:29,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:29,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:29,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930690559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:29,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:29,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:29,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182671284] [2021-06-05 05:44:29,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:29,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:29,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:29,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:29,716 INFO L87 Difference]: Start difference. First operand 887 states and 1938 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:32,967 INFO L93 Difference]: Finished difference Result 1457 states and 2999 transitions. [2021-06-05 05:44:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 05:44:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:32,969 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 05:44:32,969 INFO L226 Difference]: Without dead ends: 1419 [2021-06-05 05:44:32,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5238 ImplicationChecksByTransitivity, 3129.6ms TimeCoverageRelationStatistics Valid=1995, Invalid=14775, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 05:44:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-05 05:44:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 889. [2021-06-05 05:44:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.186936936936937) internal successors, (1942), 888 states have internal predecessors, (1942), 0 states have call successors, (0), 0 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 05:44:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1942 transitions. [2021-06-05 05:44:32,983 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1942 transitions. Word has length 43 [2021-06-05 05:44:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:32,984 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 1942 transitions. [2021-06-05 05:44:32,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1942 transitions. [2021-06-05 05:44:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:32,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:32,985 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:33,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 05:44:33,201 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:33,201 INFO L82 PathProgramCache]: Analyzing trace with hash 331633839, now seen corresponding path program 138 times [2021-06-05 05:44:33,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:33,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778524452] [2021-06-05 05:44:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:33,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:33,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778524452] [2021-06-05 05:44:33,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778524452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:33,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737725284] [2021-06-05 05:44:33,559 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:33,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:44:33,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:33,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:34,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737725284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:34,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:34,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:34,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822395054] [2021-06-05 05:44:34,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:34,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:34,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:34,206 INFO L87 Difference]: Start difference. First operand 889 states and 1942 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:37,926 INFO L93 Difference]: Finished difference Result 1520 states and 3112 transitions. [2021-06-05 05:44:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 05:44:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:37,927 INFO L225 Difference]: With dead ends: 1520 [2021-06-05 05:44:37,927 INFO L226 Difference]: Without dead ends: 1475 [2021-06-05 05:44:37,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 3592.9ms TimeCoverageRelationStatistics Valid=2173, Invalid=15649, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 05:44:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-05 05:44:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 892. [2021-06-05 05:44:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.1885521885521886) internal successors, (1950), 891 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 05:44:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1950 transitions. [2021-06-05 05:44:37,940 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1950 transitions. Word has length 43 [2021-06-05 05:44:37,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:37,941 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 1950 transitions. [2021-06-05 05:44:37,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1950 transitions. [2021-06-05 05:44:37,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:37,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:37,941 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:38,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 05:44:38,142 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:38,142 INFO L82 PathProgramCache]: Analyzing trace with hash -933294021, now seen corresponding path program 139 times [2021-06-05 05:44:38,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:38,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292330824] [2021-06-05 05:44:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:38,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:38,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292330824] [2021-06-05 05:44:38,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292330824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:38,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782156242] [2021-06-05 05:44:38,487 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:38,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:38,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:39,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782156242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:39,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:39,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:39,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101478631] [2021-06-05 05:44:39,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:39,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:39,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:39,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:39,108 INFO L87 Difference]: Start difference. First operand 892 states and 1950 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:42,449 INFO L93 Difference]: Finished difference Result 1310 states and 2689 transitions. [2021-06-05 05:44:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:44:42,449 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:42,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:42,450 INFO L225 Difference]: With dead ends: 1310 [2021-06-05 05:44:42,450 INFO L226 Difference]: Without dead ends: 1290 [2021-06-05 05:44:42,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4570 ImplicationChecksByTransitivity, 3220.6ms TimeCoverageRelationStatistics Valid=1991, Invalid=13015, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 05:44:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-06-05 05:44:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 893. [2021-06-05 05:44:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.188340807174888) internal successors, (1952), 892 states have internal predecessors, (1952), 0 states have call successors, (0), 0 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 05:44:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1952 transitions. [2021-06-05 05:44:42,459 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1952 transitions. Word has length 43 [2021-06-05 05:44:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:42,459 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 1952 transitions. [2021-06-05 05:44:42,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1952 transitions. [2021-06-05 05:44:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:42,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:42,460 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:42,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 05:44:42,660 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1154201253, now seen corresponding path program 140 times [2021-06-05 05:44:42,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:42,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799684319] [2021-06-05 05:44:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:42,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:42,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799684319] [2021-06-05 05:44:42,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799684319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:42,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831793272] [2021-06-05 05:44:42,969 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:42,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:42,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:42,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:42,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:43,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831793272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:43,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:43,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936598691] [2021-06-05 05:44:43,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:43,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:43,523 INFO L87 Difference]: Start difference. First operand 893 states and 1952 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:46,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:46,238 INFO L93 Difference]: Finished difference Result 1424 states and 2924 transitions. [2021-06-05 05:44:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 05:44:46,239 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:46,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:46,240 INFO L225 Difference]: With dead ends: 1424 [2021-06-05 05:44:46,240 INFO L226 Difference]: Without dead ends: 1368 [2021-06-05 05:44:46,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2556.7ms TimeCoverageRelationStatistics Valid=1364, Invalid=10626, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 05:44:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-06-05 05:44:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 899. [2021-06-05 05:44:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.1870824053452114) internal successors, (1964), 898 states have internal predecessors, (1964), 0 states have call successors, (0), 0 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 05:44:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1964 transitions. [2021-06-05 05:44:46,248 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1964 transitions. Word has length 43 [2021-06-05 05:44:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:46,248 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 1964 transitions. [2021-06-05 05:44:46,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1964 transitions. [2021-06-05 05:44:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:46,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:46,249 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:46,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:46,450 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:46,450 INFO L82 PathProgramCache]: Analyzing trace with hash -997081623, now seen corresponding path program 141 times [2021-06-05 05:44:46,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:46,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129563745] [2021-06-05 05:44:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:46,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:46,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129563745] [2021-06-05 05:44:46,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129563745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:46,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183887336] [2021-06-05 05:44:46,765 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:46,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:44:46,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:46,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:46,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:47,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183887336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:47,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:47,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:47,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323044695] [2021-06-05 05:44:47,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:47,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:47,333 INFO L87 Difference]: Start difference. First operand 899 states and 1964 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:50,364 INFO L93 Difference]: Finished difference Result 1429 states and 2948 transitions. [2021-06-05 05:44:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 05:44:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:50,365 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 05:44:50,365 INFO L226 Difference]: Without dead ends: 1379 [2021-06-05 05:44:50,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4011 ImplicationChecksByTransitivity, 2705.6ms TimeCoverageRelationStatistics Valid=1495, Invalid=11615, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 05:44:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-06-05 05:44:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 909. [2021-06-05 05:44:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.193832599118943) internal successors, (1992), 908 states have internal predecessors, (1992), 0 states have call successors, (0), 0 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 05:44:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1992 transitions. [2021-06-05 05:44:50,374 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1992 transitions. Word has length 43 [2021-06-05 05:44:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:50,374 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 1992 transitions. [2021-06-05 05:44:50,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1992 transitions. [2021-06-05 05:44:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:50,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:50,375 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:50,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:50,575 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:50,576 INFO L82 PathProgramCache]: Analyzing trace with hash 33080877, now seen corresponding path program 142 times [2021-06-05 05:44:50,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:50,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134559637] [2021-06-05 05:44:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:50,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:50,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134559637] [2021-06-05 05:44:50,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134559637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:50,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098317584] [2021-06-05 05:44:50,882 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:50,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:50,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:50,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:51,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098317584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:51,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:51,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196481165] [2021-06-05 05:44:51,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:51,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:51,437 INFO L87 Difference]: Start difference. First operand 909 states and 1992 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:54,410 INFO L93 Difference]: Finished difference Result 1441 states and 2986 transitions. [2021-06-05 05:44:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:44:54,411 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:54,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:54,412 INFO L225 Difference]: With dead ends: 1441 [2021-06-05 05:44:54,412 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 05:44:54,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 2809.1ms TimeCoverageRelationStatistics Valid=1642, Invalid=12638, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:44:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 05:44:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 919. [2021-06-05 05:44:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.2004357298474946) internal successors, (2020), 918 states have internal predecessors, (2020), 0 states have call successors, (0), 0 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 05:44:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2020 transitions. [2021-06-05 05:44:54,421 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2020 transitions. Word has length 43 [2021-06-05 05:44:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:54,421 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2020 transitions. [2021-06-05 05:44:54,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2020 transitions. [2021-06-05 05:44:54,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:54,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:54,422 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:54,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-06-05 05:44:54,623 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:54,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1129123697, now seen corresponding path program 143 times [2021-06-05 05:44:54,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:54,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265417686] [2021-06-05 05:44:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:54,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:54,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265417686] [2021-06-05 05:44:54,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265417686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:54,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517505225] [2021-06-05 05:44:54,937 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:54,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:44:54,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:54,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:54,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:55,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517505225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:55,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:55,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:44:55,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701522170] [2021-06-05 05:44:55,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:44:55,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:44:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:44:55,512 INFO L87 Difference]: Start difference. First operand 919 states and 2020 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:58,904 INFO L93 Difference]: Finished difference Result 1453 states and 3024 transitions. [2021-06-05 05:44:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:44:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:44:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:58,905 INFO L225 Difference]: With dead ends: 1453 [2021-06-05 05:44:58,905 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 05:44:58,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4823 ImplicationChecksByTransitivity, 2977.2ms TimeCoverageRelationStatistics Valid=1814, Invalid=13686, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 05:44:58,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 05:44:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 929. [2021-06-05 05:44:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.206896551724138) internal successors, (2048), 928 states have internal predecessors, (2048), 0 states have call successors, (0), 0 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 05:44:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2048 transitions. [2021-06-05 05:44:58,915 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2048 transitions. Word has length 43 [2021-06-05 05:44:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:58,915 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2048 transitions. [2021-06-05 05:44:58,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:44:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2048 transitions. [2021-06-05 05:44:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:44:58,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:58,916 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:59,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:59,117 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1961548213, now seen corresponding path program 144 times [2021-06-05 05:44:59,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:59,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704253192] [2021-06-05 05:44:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:59,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:59,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704253192] [2021-06-05 05:44:59,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704253192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:59,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046989587] [2021-06-05 05:44:59,496 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:59,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:44:59,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:59,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:44:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:00,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046989587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:00,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:00,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:00,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320458544] [2021-06-05 05:45:00,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:00,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:00,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:00,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:00,049 INFO L87 Difference]: Start difference. First operand 929 states and 2048 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:03,737 INFO L93 Difference]: Finished difference Result 1551 states and 3204 transitions. [2021-06-05 05:45:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 05:45:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:03,739 INFO L225 Difference]: With dead ends: 1551 [2021-06-05 05:45:03,739 INFO L226 Difference]: Without dead ends: 1506 [2021-06-05 05:45:03,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 3345.0ms TimeCoverageRelationStatistics Valid=1995, Invalid=14517, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 05:45:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-06-05 05:45:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 933. [2021-06-05 05:45:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.209227467811159) internal successors, (2059), 932 states have internal predecessors, (2059), 0 states have call successors, (0), 0 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 05:45:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2059 transitions. [2021-06-05 05:45:03,748 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2059 transitions. Word has length 43 [2021-06-05 05:45:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:03,748 INFO L482 AbstractCegarLoop]: Abstraction has 933 states and 2059 transitions. [2021-06-05 05:45:03,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2059 transitions. [2021-06-05 05:45:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:03,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:03,749 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:03,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 05:45:03,950 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash 696620353, now seen corresponding path program 145 times [2021-06-05 05:45:03,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:03,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343939847] [2021-06-05 05:45:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:04,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:04,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343939847] [2021-06-05 05:45:04,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343939847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:04,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985096968] [2021-06-05 05:45:04,314 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:04,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:04,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:04,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985096968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:04,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:04,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:04,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384855118] [2021-06-05 05:45:04,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:04,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:04,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:04,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:04,871 INFO L87 Difference]: Start difference. First operand 933 states and 2059 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:08,094 INFO L93 Difference]: Finished difference Result 1369 states and 2846 transitions. [2021-06-05 05:45:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:45:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:08,096 INFO L225 Difference]: With dead ends: 1369 [2021-06-05 05:45:08,096 INFO L226 Difference]: Without dead ends: 1342 [2021-06-05 05:45:08,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 3108.2ms TimeCoverageRelationStatistics Valid=1899, Invalid=12381, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:45:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-06-05 05:45:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 901. [2021-06-05 05:45:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.1933333333333334) internal successors, (1974), 900 states have internal predecessors, (1974), 0 states have call successors, (0), 0 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 05:45:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1974 transitions. [2021-06-05 05:45:08,110 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1974 transitions. Word has length 43 [2021-06-05 05:45:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:08,110 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 1974 transitions. [2021-06-05 05:45:08,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1974 transitions. [2021-06-05 05:45:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:08,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:08,111 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:08,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 05:45:08,323 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:08,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1503474267, now seen corresponding path program 146 times [2021-06-05 05:45:08,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:08,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154908962] [2021-06-05 05:45:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:08,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:08,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154908962] [2021-06-05 05:45:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154908962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:08,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086818142] [2021-06-05 05:45:08,624 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:08,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:45:08,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:08,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:08,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:09,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086818142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:09,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:09,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:09,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196747814] [2021-06-05 05:45:09,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:09,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:09,182 INFO L87 Difference]: Start difference. First operand 901 states and 1974 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:11,956 INFO L93 Difference]: Finished difference Result 1397 states and 2882 transitions. [2021-06-05 05:45:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 05:45:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:11,957 INFO L225 Difference]: With dead ends: 1397 [2021-06-05 05:45:11,957 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 05:45:11,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4136 ImplicationChecksByTransitivity, 2666.7ms TimeCoverageRelationStatistics Valid=1473, Invalid=11867, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 05:45:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 05:45:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 905. [2021-06-05 05:45:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1924778761061945) internal successors, (1982), 904 states have internal predecessors, (1982), 0 states have call successors, (0), 0 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 05:45:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1982 transitions. [2021-06-05 05:45:11,966 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1982 transitions. Word has length 43 [2021-06-05 05:45:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:11,966 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1982 transitions. [2021-06-05 05:45:11,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1982 transitions. [2021-06-05 05:45:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:11,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:11,967 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:12,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 05:45:12,168 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash -473311767, now seen corresponding path program 147 times [2021-06-05 05:45:12,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:12,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16165862] [2021-06-05 05:45:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:12,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:12,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16165862] [2021-06-05 05:45:12,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16165862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:12,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893372814] [2021-06-05 05:45:12,474 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:12,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:45:12,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:12,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:13,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893372814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:13,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:13,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:13,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76167551] [2021-06-05 05:45:13,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:13,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:13,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:13,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:13,044 INFO L87 Difference]: Start difference. First operand 905 states and 1982 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:16,061 INFO L93 Difference]: Finished difference Result 1410 states and 2922 transitions. [2021-06-05 05:45:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:45:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:16,062 INFO L225 Difference]: With dead ends: 1410 [2021-06-05 05:45:16,062 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 05:45:16,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4542 ImplicationChecksByTransitivity, 2862.1ms TimeCoverageRelationStatistics Valid=1643, Invalid=12877, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 05:45:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 05:45:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 915. [2021-06-05 05:45:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.199124726477024) internal successors, (2010), 914 states have internal predecessors, (2010), 0 states have call successors, (0), 0 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 05:45:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2010 transitions. [2021-06-05 05:45:16,072 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2010 transitions. Word has length 43 [2021-06-05 05:45:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:16,072 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2010 transitions. [2021-06-05 05:45:16,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2010 transitions. [2021-06-05 05:45:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:16,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:16,074 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:16,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 05:45:16,277 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash 622731053, now seen corresponding path program 148 times [2021-06-05 05:45:16,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:16,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137862538] [2021-06-05 05:45:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:16,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:16,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137862538] [2021-06-05 05:45:16,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137862538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:16,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931853754] [2021-06-05 05:45:16,582 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:16,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:16,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:17,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931853754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:17,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:17,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:17,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621373729] [2021-06-05 05:45:17,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:17,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:17,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:17,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:17,137 INFO L87 Difference]: Start difference. First operand 915 states and 2010 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:20,590 INFO L93 Difference]: Finished difference Result 1428 states and 2972 transitions. [2021-06-05 05:45:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:45:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:20,592 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 05:45:20,592 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 05:45:20,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4957 ImplicationChecksByTransitivity, 3005.6ms TimeCoverageRelationStatistics Valid=1824, Invalid=13926, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 05:45:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 05:45:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 925. [2021-06-05 05:45:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.205627705627706) internal successors, (2038), 924 states have internal predecessors, (2038), 0 states have call successors, (0), 0 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 05:45:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2038 transitions. [2021-06-05 05:45:20,600 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2038 transitions. Word has length 43 [2021-06-05 05:45:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:20,601 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2038 transitions. [2021-06-05 05:45:20,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2038 transitions. [2021-06-05 05:45:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:20,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:20,601 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:20,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 05:45:20,802 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1455155569, now seen corresponding path program 149 times [2021-06-05 05:45:20,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:20,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411857223] [2021-06-05 05:45:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:21,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:21,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411857223] [2021-06-05 05:45:21,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411857223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:21,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209668190] [2021-06-05 05:45:21,154 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:21,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:45:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:21,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:21,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:21,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209668190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:21,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:21,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:21,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767462187] [2021-06-05 05:45:21,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:21,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:21,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:21,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:21,713 INFO L87 Difference]: Start difference. First operand 925 states and 2038 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:25,198 INFO L93 Difference]: Finished difference Result 1532 states and 3164 transitions. [2021-06-05 05:45:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 05:45:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:25,200 INFO L225 Difference]: With dead ends: 1532 [2021-06-05 05:45:25,200 INFO L226 Difference]: Without dead ends: 1487 [2021-06-05 05:45:25,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 3357.8ms TimeCoverageRelationStatistics Valid=2014, Invalid=14756, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 05:45:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-05 05:45:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 929. [2021-06-05 05:45:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.2079741379310347) internal successors, (2049), 928 states have internal predecessors, (2049), 0 states have call successors, (0), 0 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 05:45:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2049 transitions. [2021-06-05 05:45:25,209 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2049 transitions. Word has length 43 [2021-06-05 05:45:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:25,209 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2049 transitions. [2021-06-05 05:45:25,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2049 transitions. [2021-06-05 05:45:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:25,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:25,210 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:25,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 05:45:25,410 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash 190227709, now seen corresponding path program 150 times [2021-06-05 05:45:25,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:25,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723709097] [2021-06-05 05:45:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:25,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:25,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723709097] [2021-06-05 05:45:25,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723709097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:25,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989658248] [2021-06-05 05:45:25,755 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:25,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:45:25,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:25,784 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:45:25,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:26,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989658248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:26,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:26,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431252779] [2021-06-05 05:45:26,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:26,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:26,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:26,371 INFO L87 Difference]: Start difference. First operand 929 states and 2049 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:29,816 INFO L93 Difference]: Finished difference Result 1359 states and 2823 transitions. [2021-06-05 05:45:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:45:29,817 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:29,818 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 05:45:29,818 INFO L226 Difference]: Without dead ends: 1332 [2021-06-05 05:45:29,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 3309.7ms TimeCoverageRelationStatistics Valid=1914, Invalid=12606, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 05:45:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-05 05:45:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 881. [2021-06-05 05:45:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1818181818181817) internal successors, (1920), 880 states have internal predecessors, (1920), 0 states have call successors, (0), 0 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 05:45:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1920 transitions. [2021-06-05 05:45:29,826 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1920 transitions. Word has length 43 [2021-06-05 05:45:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:29,826 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1920 transitions. [2021-06-05 05:45:29,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1920 transitions. [2021-06-05 05:45:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:29,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:29,827 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:30,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 05:45:30,028 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:30,028 INFO L82 PathProgramCache]: Analyzing trace with hash -523000667, now seen corresponding path program 151 times [2021-06-05 05:45:30,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:30,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127820256] [2021-06-05 05:45:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:30,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:30,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127820256] [2021-06-05 05:45:30,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127820256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:30,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616623959] [2021-06-05 05:45:30,334 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:30,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:30,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:30,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616623959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:30,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:30,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:30,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062528843] [2021-06-05 05:45:30,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:30,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:30,897 INFO L87 Difference]: Start difference. First operand 881 states and 1920 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:33,941 INFO L93 Difference]: Finished difference Result 1312 states and 2692 transitions. [2021-06-05 05:45:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:45:33,942 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:33,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:33,943 INFO L225 Difference]: With dead ends: 1312 [2021-06-05 05:45:33,943 INFO L226 Difference]: Without dead ends: 1268 [2021-06-05 05:45:33,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4670 ImplicationChecksByTransitivity, 2891.3ms TimeCoverageRelationStatistics Valid=1619, Invalid=13143, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 05:45:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-06-05 05:45:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 885. [2021-06-05 05:45:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.180995475113122) internal successors, (1928), 884 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 05:45:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1928 transitions. [2021-06-05 05:45:33,952 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1928 transitions. Word has length 43 [2021-06-05 05:45:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:33,952 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1928 transitions. [2021-06-05 05:45:33,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1928 transitions. [2021-06-05 05:45:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:33,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:33,953 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:34,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 05:45:34,153 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash 573042153, now seen corresponding path program 152 times [2021-06-05 05:45:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:34,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693360422] [2021-06-05 05:45:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:34,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:34,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693360422] [2021-06-05 05:45:34,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693360422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:34,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859150020] [2021-06-05 05:45:34,468 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:34,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:45:34,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:34,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:34,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:35,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859150020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:35,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:35,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:35,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997537318] [2021-06-05 05:45:35,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:35,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:35,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:35,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:35,028 INFO L87 Difference]: Start difference. First operand 885 states and 1928 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:38,318 INFO L93 Difference]: Finished difference Result 1325 states and 2728 transitions. [2021-06-05 05:45:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:45:38,318 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:38,319 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 05:45:38,319 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 05:45:38,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 3059.8ms TimeCoverageRelationStatistics Valid=1818, Invalid=14184, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 05:45:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 05:45:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 891. [2021-06-05 05:45:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.1842696629213485) internal successors, (1944), 890 states have internal predecessors, (1944), 0 states have call successors, (0), 0 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 05:45:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1944 transitions. [2021-06-05 05:45:38,329 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1944 transitions. Word has length 43 [2021-06-05 05:45:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:38,330 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 1944 transitions. [2021-06-05 05:45:38,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1944 transitions. [2021-06-05 05:45:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:38,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:38,331 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:38,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 05:45:38,553 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:38,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1405466669, now seen corresponding path program 153 times [2021-06-05 05:45:38,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:38,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290555977] [2021-06-05 05:45:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:39,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290555977] [2021-06-05 05:45:39,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290555977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601792888] [2021-06-05 05:45:39,007 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:39,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:45:39,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:39,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:39,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:39,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601792888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:39,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:39,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:39,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209339080] [2021-06-05 05:45:39,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:39,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:39,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:39,585 INFO L87 Difference]: Start difference. First operand 891 states and 1944 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:43,132 INFO L93 Difference]: Finished difference Result 1435 states and 2932 transitions. [2021-06-05 05:45:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 05:45:43,132 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:43,133 INFO L225 Difference]: With dead ends: 1435 [2021-06-05 05:45:43,133 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 05:45:43,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5395 ImplicationChecksByTransitivity, 3490.8ms TimeCoverageRelationStatistics Valid=2017, Invalid=15013, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 05:45:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 05:45:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 895. [2021-06-05 05:45:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.1868008948545863) internal successors, (1955), 894 states have internal predecessors, (1955), 0 states have call successors, (0), 0 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 05:45:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1955 transitions. [2021-06-05 05:45:43,142 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1955 transitions. Word has length 43 [2021-06-05 05:45:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:43,142 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 1955 transitions. [2021-06-05 05:45:43,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1955 transitions. [2021-06-05 05:45:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:43,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:43,143 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:43,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 05:45:43,344 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:43,344 INFO L82 PathProgramCache]: Analyzing trace with hash 140538809, now seen corresponding path program 154 times [2021-06-05 05:45:43,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:43,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070925771] [2021-06-05 05:45:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:43,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:43,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070925771] [2021-06-05 05:45:43,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070925771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:43,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440692637] [2021-06-05 05:45:43,714 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:43,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:43,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:43,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:44,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440692637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:44,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:44,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:44,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606855692] [2021-06-05 05:45:44,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:44,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:44,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:44,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:44,277 INFO L87 Difference]: Start difference. First operand 895 states and 1955 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:47,601 INFO L93 Difference]: Finished difference Result 1303 states and 2684 transitions. [2021-06-05 05:45:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:45:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:47,602 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 05:45:47,602 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 05:45:47,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4606 ImplicationChecksByTransitivity, 3227.0ms TimeCoverageRelationStatistics Valid=1928, Invalid=12834, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 05:45:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 05:45:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 643. [2021-06-05 05:45:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.115264797507788) internal successors, (1358), 642 states have internal predecessors, (1358), 0 states have call successors, (0), 0 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 05:45:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1358 transitions. [2021-06-05 05:45:47,610 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1358 transitions. Word has length 43 [2021-06-05 05:45:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:47,610 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1358 transitions. [2021-06-05 05:45:47,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1358 transitions. [2021-06-05 05:45:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:47,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:47,610 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:47,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 05:45:47,811 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:47,811 INFO L82 PathProgramCache]: Analyzing trace with hash -544326747, now seen corresponding path program 155 times [2021-06-05 05:45:47,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:47,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700237022] [2021-06-05 05:45:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:48,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:48,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700237022] [2021-06-05 05:45:48,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700237022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:48,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403648210] [2021-06-05 05:45:48,116 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:48,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:45:48,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:48,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:48,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403648210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:48,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:48,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:48,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635599071] [2021-06-05 05:45:48,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:48,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:48,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:48,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:48,687 INFO L87 Difference]: Start difference. First operand 643 states and 1358 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:52,063 INFO L93 Difference]: Finished difference Result 1011 states and 2000 transitions. [2021-06-05 05:45:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:45:52,064 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:52,065 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 05:45:52,065 INFO L226 Difference]: Without dead ends: 973 [2021-06-05 05:45:52,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 3075.9ms TimeCoverageRelationStatistics Valid=1787, Invalid=14469, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 05:45:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-06-05 05:45:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 647. [2021-06-05 05:45:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.1145510835913313) internal successors, (1366), 646 states have internal predecessors, (1366), 0 states have call successors, (0), 0 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 05:45:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1366 transitions. [2021-06-05 05:45:52,071 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1366 transitions. Word has length 43 [2021-06-05 05:45:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:52,071 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1366 transitions. [2021-06-05 05:45:52,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1366 transitions. [2021-06-05 05:45:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:52,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:52,072 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:52,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:52,272 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash 288097769, now seen corresponding path program 156 times [2021-06-05 05:45:52,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:52,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887761393] [2021-06-05 05:45:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:52,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:52,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887761393] [2021-06-05 05:45:52,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887761393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:52,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694704205] [2021-06-05 05:45:52,617 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:52,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:45:52,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:52,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:53,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694704205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:53,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:53,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:53,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834668169] [2021-06-05 05:45:53,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:53,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:53,202 INFO L87 Difference]: Start difference. First operand 647 states and 1366 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:56,797 INFO L93 Difference]: Finished difference Result 1112 states and 2182 transitions. [2021-06-05 05:45:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 05:45:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:45:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:56,799 INFO L225 Difference]: With dead ends: 1112 [2021-06-05 05:45:56,799 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 05:45:56,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 3403.8ms TimeCoverageRelationStatistics Valid=2004, Invalid=15288, Unknown=0, NotChecked=0, Total=17292 [2021-06-05 05:45:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 05:45:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 649. [2021-06-05 05:45:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.115740740740741) internal successors, (1371), 648 states have internal predecessors, (1371), 0 states have call successors, (0), 0 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 05:45:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1371 transitions. [2021-06-05 05:45:56,806 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1371 transitions. Word has length 43 [2021-06-05 05:45:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:56,806 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1371 transitions. [2021-06-05 05:45:56,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:45:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1371 transitions. [2021-06-05 05:45:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:45:56,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:56,807 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:57,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 05:45:57,007 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash -976830091, now seen corresponding path program 157 times [2021-06-05 05:45:57,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:57,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985869458] [2021-06-05 05:45:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:57,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:57,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985869458] [2021-06-05 05:45:57,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985869458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64789330] [2021-06-05 05:45:57,360 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:57,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:57,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64789330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:57,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:57,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:45:57,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700304268] [2021-06-05 05:45:57,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:57,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:57,929 INFO L87 Difference]: Start difference. First operand 649 states and 1371 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:46:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:01,115 INFO L93 Difference]: Finished difference Result 1006 states and 2001 transitions. [2021-06-05 05:46:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 05:46:01,116 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:46:01,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:01,117 INFO L225 Difference]: With dead ends: 1006 [2021-06-05 05:46:01,117 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 05:46:01,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 3209.0ms TimeCoverageRelationStatistics Valid=1906, Invalid=12856, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 05:46:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 05:46:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 637. [2021-06-05 05:46:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.1037735849056602) internal successors, (1338), 636 states have internal predecessors, (1338), 0 states have call successors, (0), 0 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 05:46:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1338 transitions. [2021-06-05 05:46:01,123 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1338 transitions. Word has length 43 [2021-06-05 05:46:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:01,123 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1338 transitions. [2021-06-05 05:46:01,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:46:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1338 transitions. [2021-06-05 05:46:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:46:01,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:01,124 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:01,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 05:46:01,324 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1442671963, now seen corresponding path program 158 times [2021-06-05 05:46:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:01,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83293423] [2021-06-05 05:46:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:01,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83293423] [2021-06-05 05:46:01,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83293423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446963135] [2021-06-05 05:46:01,598 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:01,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:01,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:01,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:46:01,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:02,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446963135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:02,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:02,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:46:02,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182566881] [2021-06-05 05:46:02,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:02,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:02,166 INFO L87 Difference]: Start difference. First operand 637 states and 1338 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:46:06,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:06,442 INFO L93 Difference]: Finished difference Result 1161 states and 2336 transitions. [2021-06-05 05:46:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 05:46:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:46:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:06,444 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 05:46:06,444 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 05:46:06,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6808 ImplicationChecksByTransitivity, 3874.0ms TimeCoverageRelationStatistics Valid=2323, Invalid=17699, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 05:46:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 05:46:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 653. [2021-06-05 05:46:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.105828220858896) internal successors, (1373), 652 states have internal predecessors, (1373), 0 states have call successors, (0), 0 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 05:46:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1373 transitions. [2021-06-05 05:46:06,451 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1373 transitions. Word has length 43 [2021-06-05 05:46:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:06,451 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1373 transitions. [2021-06-05 05:46:06,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:46:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1373 transitions. [2021-06-05 05:46:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:46:06,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:06,451 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:06,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:06,652 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:06,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1587367473, now seen corresponding path program 159 times [2021-06-05 05:46:06,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:06,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785373583] [2021-06-05 05:46:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:06,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:06,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785373583] [2021-06-05 05:46:06,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785373583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:06,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113942928] [2021-06-05 05:46:06,943 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:06,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:46:06,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:06,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:46:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113942928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:07,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:07,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:46:07,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000278999] [2021-06-05 05:46:07,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:07,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:07,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:07,567 INFO L87 Difference]: Start difference. First operand 653 states and 1373 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:46:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:10,547 INFO L93 Difference]: Finished difference Result 1143 states and 2277 transitions. [2021-06-05 05:46:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 05:46:10,547 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2021-06-05 05:46:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:10,548 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 05:46:10,548 INFO L226 Difference]: Without dead ends: 1077 [2021-06-05 05:46:10,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 2998.5ms TimeCoverageRelationStatistics Valid=1808, Invalid=11998, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 05:46:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-06-05 05:46:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 444. [2021-06-05 05:46:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 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 05:46:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-06-05 05:46:10,556 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 43 [2021-06-05 05:46:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:10,557 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-06-05 05:46:10,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 05:46:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-06-05 05:46:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:46:10,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:10,557 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:10,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:10,758 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash -976438983, now seen corresponding path program 160 times [2021-06-05 05:46:10,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:10,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275705025] [2021-06-05 05:46:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:11,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275705025] [2021-06-05 05:46:11,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275705025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396807411] [2021-06-05 05:46:11,098 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:11,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:11,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:11,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:46:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:11,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396807411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:11,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:11,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2021-06-05 05:46:11,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170563854] [2021-06-05 05:46:11,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:46:11,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:46:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:46:11,788 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 05:46:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:18,206 INFO L93 Difference]: Finished difference Result 790 states and 1593 transitions. [2021-06-05 05:46:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 05:46:18,206 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 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 43 [2021-06-05 05:46:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:18,207 INFO L225 Difference]: With dead ends: 790 [2021-06-05 05:46:18,207 INFO L226 Difference]: Without dead ends: 764 [2021-06-05 05:46:18,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 5686.0ms TimeCoverageRelationStatistics Valid=1380, Invalid=16442, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 05:46:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-06-05 05:46:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 387. [2021-06-05 05:46:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.0725388601036268) internal successors, (800), 386 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 05:46:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 800 transitions. [2021-06-05 05:46:18,211 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 800 transitions. Word has length 43 [2021-06-05 05:46:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:18,211 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 800 transitions. [2021-06-05 05:46:18,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 05:46:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 800 transitions. [2021-06-05 05:46:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:46:18,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:18,212 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:18,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 05:46:18,413 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash 126220515, now seen corresponding path program 161 times [2021-06-05 05:46:18,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:18,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210919771] [2021-06-05 05:46:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:46:18,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:18,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210919771] [2021-06-05 05:46:18,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210919771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:18,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449516042] [2021-06-05 05:46:18,500 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:18,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:46:18,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:18,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:46:18,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449516042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:18,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:18,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:46:18,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466573545] [2021-06-05 05:46:18,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:46:18,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:46:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:46:18,603 INFO L87 Difference]: Start difference. First operand 387 states and 800 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:18,770 INFO L93 Difference]: Finished difference Result 657 states and 1304 transitions. [2021-06-05 05:46:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:46:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:46:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:18,771 INFO L225 Difference]: With dead ends: 657 [2021-06-05 05:46:18,771 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 05:46:18,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:46:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 05:46:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 418. [2021-06-05 05:46:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0839328537170263) internal successors, (869), 417 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 869 transitions. [2021-06-05 05:46:18,775 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 869 transitions. Word has length 45 [2021-06-05 05:46:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:18,775 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 869 transitions. [2021-06-05 05:46:18,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 869 transitions. [2021-06-05 05:46:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:46:18,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:18,776 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 05:46:18,976 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1358919197, now seen corresponding path program 162 times [2021-06-05 05:46:18,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:18,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210271604] [2021-06-05 05:46:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:19,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:19,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210271604] [2021-06-05 05:46:19,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210271604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:19,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153780932] [2021-06-05 05:46:19,482 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:19,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:46:19,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:19,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 05:46:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:20,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153780932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:20,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:20,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 05:46:20,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86532969] [2021-06-05 05:46:20,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:20,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:20,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:20,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:20,239 INFO L87 Difference]: Start difference. First operand 418 states and 869 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 05:46:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:21,965 INFO L93 Difference]: Finished difference Result 559 states and 1149 transitions. [2021-06-05 05:46:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:46:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:46:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:21,966 INFO L225 Difference]: With dead ends: 559 [2021-06-05 05:46:21,966 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 05:46:21,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1567.6ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:46:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 05:46:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 435. [2021-06-05 05:46:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.0806451612903225) internal successors, (903), 434 states have internal predecessors, (903), 0 states have call successors, (0), 0 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 05:46:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 903 transitions. [2021-06-05 05:46:21,969 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 903 transitions. Word has length 45 [2021-06-05 05:46:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:21,970 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 903 transitions. [2021-06-05 05:46:21,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 05:46:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 903 transitions. [2021-06-05 05:46:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:46:21,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:21,970 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:22,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 05:46:22,171 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1371110303, now seen corresponding path program 163 times [2021-06-05 05:46:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:22,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228373140] [2021-06-05 05:46:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:46:22,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:22,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228373140] [2021-06-05 05:46:22,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228373140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:22,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220070511] [2021-06-05 05:46:22,495 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:22,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 05:46:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:23,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220070511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:23,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:23,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-06-05 05:46:23,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711671291] [2021-06-05 05:46:23,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:23,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:23,200 INFO L87 Difference]: Start difference. First operand 435 states and 903 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 05:46:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:25,795 INFO L93 Difference]: Finished difference Result 726 states and 1438 transitions. [2021-06-05 05:46:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:46:25,795 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:46:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:25,796 INFO L225 Difference]: With dead ends: 726 [2021-06-05 05:46:25,796 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 05:46:25,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 2451.1ms TimeCoverageRelationStatistics Valid=626, Invalid=9676, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 05:46:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 05:46:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 347. [2021-06-05 05:46:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 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 05:46:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-06-05 05:46:25,802 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-06-05 05:46:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:25,802 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-06-05 05:46:25,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 05:46:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-06-05 05:46:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:46:25,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:25,803 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:26,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-06-05 05:46:26,025 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:26,025 INFO L82 PathProgramCache]: Analyzing trace with hash 705869159, now seen corresponding path program 164 times [2021-06-05 05:46:26,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:26,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464808394] [2021-06-05 05:46:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:26,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:26,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464808394] [2021-06-05 05:46:26,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464808394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:26,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733215245] [2021-06-05 05:46:26,535 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:26,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:26,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 05:46:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:27,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733215245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:27,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:27,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2021-06-05 05:46:27,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334105711] [2021-06-05 05:46:27,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:46:27,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:27,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:46:27,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:46:27,419 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 05:46:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:28,651 INFO L93 Difference]: Finished difference Result 477 states and 976 transitions. [2021-06-05 05:46:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:46:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:46:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:28,652 INFO L225 Difference]: With dead ends: 477 [2021-06-05 05:46:28,652 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 05:46:28,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1596.6ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:46:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 05:46:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 347. [2021-06-05 05:46:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 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 05:46:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-06-05 05:46:28,655 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-06-05 05:46:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:28,655 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-06-05 05:46:28,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 05:46:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-06-05 05:46:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:46:28,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:28,661 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:28,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 05:46:28,872 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:28,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:28,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1550510357, now seen corresponding path program 165 times [2021-06-05 05:46:28,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:28,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323764771] [2021-06-05 05:46:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:29,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:29,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323764771] [2021-06-05 05:46:29,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323764771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:29,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243585687] [2021-06-05 05:46:29,388 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:29,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:46:29,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:29,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 05:46:29,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:30,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243585687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:30,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:30,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 05:46:30,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774556819] [2021-06-05 05:46:30,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:30,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:30,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:30,168 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 05:46:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:31,778 INFO L93 Difference]: Finished difference Result 491 states and 1004 transitions. [2021-06-05 05:46:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:46:31,778 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:46:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:31,778 INFO L225 Difference]: With dead ends: 491 [2021-06-05 05:46:31,778 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 05:46:31,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1572.3ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:46:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 05:46:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 355. [2021-06-05 05:46:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.073446327683616) internal successors, (734), 354 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 05:46:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 734 transitions. [2021-06-05 05:46:31,782 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 734 transitions. Word has length 45 [2021-06-05 05:46:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:31,782 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 734 transitions. [2021-06-05 05:46:31,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 05:46:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 734 transitions. [2021-06-05 05:46:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:46:31,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:31,782 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:31,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:31,983 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:31,983 INFO L82 PathProgramCache]: Analyzing trace with hash -972740753, now seen corresponding path program 166 times [2021-06-05 05:46:31,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:31,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021280606] [2021-06-05 05:46:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:46:32,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:32,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021280606] [2021-06-05 05:46:32,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021280606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:32,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509334211] [2021-06-05 05:46:32,315 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:32,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:32,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:32,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 05:46:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:32,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509334211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:32,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:32,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-06-05 05:46:32,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562405938] [2021-06-05 05:46:32,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:32,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:32,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1658, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:32,989 INFO L87 Difference]: Start difference. First operand 355 states and 734 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:35,891 INFO L93 Difference]: Finished difference Result 605 states and 1216 transitions. [2021-06-05 05:46:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 05:46:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:46:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:35,892 INFO L225 Difference]: With dead ends: 605 [2021-06-05 05:46:35,892 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 05:46:35,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 2429.9ms TimeCoverageRelationStatistics Valid=647, Invalid=9655, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 05:46:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 05:46:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 384. [2021-06-05 05:46:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0704960835509136) internal successors, (793), 383 states have internal predecessors, (793), 0 states have call successors, (0), 0 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 05:46:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 793 transitions. [2021-06-05 05:46:35,896 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 793 transitions. Word has length 45 [2021-06-05 05:46:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:35,896 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 793 transitions. [2021-06-05 05:46:35,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 793 transitions. [2021-06-05 05:46:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:46:35,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:35,896 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:36,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 05:46:36,097 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 167 times [2021-06-05 05:46:36,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:36,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151813192] [2021-06-05 05:46:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:36,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:36,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151813192] [2021-06-05 05:46:36,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151813192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:36,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149843878] [2021-06-05 05:46:36,451 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:36,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:46:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:36,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:46:36,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:37,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149843878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:37,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:37,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:46:37,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659195788] [2021-06-05 05:46:37,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:46:37,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:37,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:46:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:46:37,190 INFO L87 Difference]: Start difference. First operand 384 states and 793 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:40,221 INFO L93 Difference]: Finished difference Result 934 states and 1837 transitions. [2021-06-05 05:46:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 05:46:40,222 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:46:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:40,223 INFO L225 Difference]: With dead ends: 934 [2021-06-05 05:46:40,223 INFO L226 Difference]: Without dead ends: 855 [2021-06-05 05:46:40,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3856 ImplicationChecksByTransitivity, 2942.2ms TimeCoverageRelationStatistics Valid=1642, Invalid=11468, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 05:46:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-06-05 05:46:40,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 477. [2021-06-05 05:46:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.1512605042016806) internal successors, (1024), 476 states have internal predecessors, (1024), 0 states have call successors, (0), 0 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 05:46:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1024 transitions. [2021-06-05 05:46:40,229 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1024 transitions. Word has length 47 [2021-06-05 05:46:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:40,229 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1024 transitions. [2021-06-05 05:46:40,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:40,229 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1024 transitions. [2021-06-05 05:46:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:46:40,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:40,230 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:40,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:40,446 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:40,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1264016873, now seen corresponding path program 168 times [2021-06-05 05:46:40,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:40,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880919672] [2021-06-05 05:46:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:40,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:40,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880919672] [2021-06-05 05:46:40,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880919672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:40,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936477534] [2021-06-05 05:46:40,803 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:40,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:46:40,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:40,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 05:46:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:41,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936477534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:41,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:41,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:46:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917751108] [2021-06-05 05:46:41,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:46:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:46:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:46:41,562 INFO L87 Difference]: Start difference. First operand 477 states and 1024 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:44,894 INFO L93 Difference]: Finished difference Result 978 states and 1910 transitions. [2021-06-05 05:46:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:46:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:46:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:44,895 INFO L225 Difference]: With dead ends: 978 [2021-06-05 05:46:44,895 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 05:46:44,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4027 ImplicationChecksByTransitivity, 3356.1ms TimeCoverageRelationStatistics Valid=1709, Invalid=12571, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:46:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 05:46:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 479. [2021-06-05 05:46:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1506276150627617) internal successors, (1028), 478 states have internal predecessors, (1028), 0 states have call successors, (0), 0 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 05:46:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1028 transitions. [2021-06-05 05:46:44,901 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1028 transitions. Word has length 47 [2021-06-05 05:46:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:44,901 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1028 transitions. [2021-06-05 05:46:44,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1028 transitions. [2021-06-05 05:46:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:46:44,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:44,902 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:45,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:45,102 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1204905819, now seen corresponding path program 169 times [2021-06-05 05:46:45,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:45,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381215727] [2021-06-05 05:46:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:45,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:45,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381215727] [2021-06-05 05:46:45,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381215727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:45,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286325556] [2021-06-05 05:46:45,451 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:45,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:46:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:46,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286325556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:46,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:46,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:46:46,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814613760] [2021-06-05 05:46:46,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:46:46,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:46,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:46:46,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:46:46,082 INFO L87 Difference]: Start difference. First operand 479 states and 1028 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:49,416 INFO L93 Difference]: Finished difference Result 976 states and 1908 transitions. [2021-06-05 05:46:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:46:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:46:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:49,417 INFO L225 Difference]: With dead ends: 976 [2021-06-05 05:46:49,417 INFO L226 Difference]: Without dead ends: 914 [2021-06-05 05:46:49,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 3116.9ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 05:46:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-06-05 05:46:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 481. [2021-06-05 05:46:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.15) internal successors, (1032), 480 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 05:46:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1032 transitions. [2021-06-05 05:46:49,423 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1032 transitions. Word has length 47 [2021-06-05 05:46:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:49,423 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1032 transitions. [2021-06-05 05:46:49,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1032 transitions. [2021-06-05 05:46:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:46:49,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:49,423 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:49,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:49,645 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:49,646 INFO L82 PathProgramCache]: Analyzing trace with hash -298668641, now seen corresponding path program 170 times [2021-06-05 05:46:49,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:49,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365756115] [2021-06-05 05:46:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:49,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:49,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365756115] [2021-06-05 05:46:49,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365756115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:49,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648092813] [2021-06-05 05:46:49,990 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:50,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:50,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:46:50,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:50,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648092813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:50,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:50,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:46:50,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488416111] [2021-06-05 05:46:50,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:46:50,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:50,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:46:50,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:46:50,618 INFO L87 Difference]: Start difference. First operand 481 states and 1032 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:53,800 INFO L93 Difference]: Finished difference Result 974 states and 1906 transitions. [2021-06-05 05:46:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 05:46:53,800 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:46:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:53,802 INFO L225 Difference]: With dead ends: 974 [2021-06-05 05:46:53,802 INFO L226 Difference]: Without dead ends: 918 [2021-06-05 05:46:53,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 3165.6ms TimeCoverageRelationStatistics Valid=1940, Invalid=14830, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 05:46:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-06-05 05:46:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 483. [2021-06-05 05:46:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.1493775933609958) internal successors, (1036), 482 states have internal predecessors, (1036), 0 states have call successors, (0), 0 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 05:46:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1036 transitions. [2021-06-05 05:46:53,808 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1036 transitions. Word has length 47 [2021-06-05 05:46:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:53,808 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1036 transitions. [2021-06-05 05:46:53,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1036 transitions. [2021-06-05 05:46:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:46:53,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:53,809 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:54,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 05:46:54,010 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:54,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1845015779, now seen corresponding path program 171 times [2021-06-05 05:46:54,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:54,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508419866] [2021-06-05 05:46:54,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:54,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:54,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508419866] [2021-06-05 05:46:54,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508419866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:54,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907731263] [2021-06-05 05:46:54,357 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:54,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:46:54,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:54,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:46:54,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:55,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907731263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:55,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:55,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:46:55,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215158508] [2021-06-05 05:46:55,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:46:55,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:46:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:46:55,009 INFO L87 Difference]: Start difference. First operand 483 states and 1036 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:58,652 INFO L93 Difference]: Finished difference Result 972 states and 1904 transitions. [2021-06-05 05:46:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 05:46:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:46:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:58,653 INFO L225 Difference]: With dead ends: 972 [2021-06-05 05:46:58,653 INFO L226 Difference]: Without dead ends: 922 [2021-06-05 05:46:58,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 3390.3ms TimeCoverageRelationStatistics Valid=2092, Invalid=15998, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 05:46:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-06-05 05:46:58,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 485. [2021-06-05 05:46:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.1487603305785123) internal successors, (1040), 484 states have internal predecessors, (1040), 0 states have call successors, (0), 0 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 05:46:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1040 transitions. [2021-06-05 05:46:58,659 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1040 transitions. Word has length 47 [2021-06-05 05:46:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:58,659 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1040 transitions. [2021-06-05 05:46:58,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:46:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1040 transitions. [2021-06-05 05:46:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:46:58,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:58,659 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:58,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:58,860 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:58,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1419789017, now seen corresponding path program 172 times [2021-06-05 05:46:58,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:58,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295614816] [2021-06-05 05:46:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:59,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:59,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295614816] [2021-06-05 05:46:59,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295614816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:59,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279536070] [2021-06-05 05:46:59,216 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:59,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:59,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:59,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:46:59,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:59,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279536070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:59,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:59,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:46:59,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782765038] [2021-06-05 05:46:59,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:46:59,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:59,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:46:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:46:59,842 INFO L87 Difference]: Start difference. First operand 485 states and 1040 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:03,579 INFO L93 Difference]: Finished difference Result 970 states and 1902 transitions. [2021-06-05 05:47:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 05:47:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:03,581 INFO L225 Difference]: With dead ends: 970 [2021-06-05 05:47:03,581 INFO L226 Difference]: Without dead ends: 926 [2021-06-05 05:47:03,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6075 ImplicationChecksByTransitivity, 3528.0ms TimeCoverageRelationStatistics Valid=2264, Invalid=17196, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 05:47:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-06-05 05:47:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 487. [2021-06-05 05:47:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1481481481481484) internal successors, (1044), 486 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 05:47:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1044 transitions. [2021-06-05 05:47:03,586 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1044 transitions. Word has length 47 [2021-06-05 05:47:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:03,586 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1044 transitions. [2021-06-05 05:47:03,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:03,586 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1044 transitions. [2021-06-05 05:47:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:03,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:03,587 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:03,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 05:47:03,787 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:03,787 INFO L82 PathProgramCache]: Analyzing trace with hash -323746197, now seen corresponding path program 173 times [2021-06-05 05:47:03,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:03,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930844259] [2021-06-05 05:47:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:04,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930844259] [2021-06-05 05:47:04,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930844259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773996408] [2021-06-05 05:47:04,133 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:04,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:47:04,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:04,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:04,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:04,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773996408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:04,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:04,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:04,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758552471] [2021-06-05 05:47:04,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:04,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:04,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:04,756 INFO L87 Difference]: Start difference. First operand 487 states and 1044 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:08,676 INFO L93 Difference]: Finished difference Result 968 states and 1900 transitions. [2021-06-05 05:47:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-06-05 05:47:08,677 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:08,677 INFO L225 Difference]: With dead ends: 968 [2021-06-05 05:47:08,677 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 05:47:08,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6565 ImplicationChecksByTransitivity, 3675.0ms TimeCoverageRelationStatistics Valid=2461, Invalid=18419, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 05:47:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 05:47:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 489. [2021-06-05 05:47:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.1475409836065573) internal successors, (1048), 488 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 05:47:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1048 transitions. [2021-06-05 05:47:08,683 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1048 transitions. Word has length 47 [2021-06-05 05:47:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:08,683 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1048 transitions. [2021-06-05 05:47:08,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1048 transitions. [2021-06-05 05:47:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:08,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:08,684 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:08,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 05:47:08,885 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:08,885 INFO L82 PathProgramCache]: Analyzing trace with hash 508678319, now seen corresponding path program 174 times [2021-06-05 05:47:08,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:08,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69199191] [2021-06-05 05:47:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:09,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:09,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69199191] [2021-06-05 05:47:09,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69199191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:09,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56037453] [2021-06-05 05:47:09,271 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:09,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:47:09,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:09,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:09,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56037453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:09,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:09,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:09,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136293091] [2021-06-05 05:47:09,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:09,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:09,909 INFO L87 Difference]: Start difference. First operand 489 states and 1048 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:14,403 INFO L93 Difference]: Finished difference Result 1037 states and 2023 transitions. [2021-06-05 05:47:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 05:47:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:14,404 INFO L225 Difference]: With dead ends: 1037 [2021-06-05 05:47:14,405 INFO L226 Difference]: Without dead ends: 992 [2021-06-05 05:47:14,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6908 ImplicationChecksByTransitivity, 4085.1ms TimeCoverageRelationStatistics Valid=2661, Invalid=19391, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 05:47:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-05 05:47:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 492. [2021-06-05 05:47:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.15071283095723) internal successors, (1056), 491 states have internal predecessors, (1056), 0 states have call successors, (0), 0 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 05:47:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1056 transitions. [2021-06-05 05:47:14,410 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1056 transitions. Word has length 47 [2021-06-05 05:47:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:14,410 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1056 transitions. [2021-06-05 05:47:14,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1056 transitions. [2021-06-05 05:47:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:14,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:14,411 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:14,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 05:47:14,611 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash -756249541, now seen corresponding path program 175 times [2021-06-05 05:47:14,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:14,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111862686] [2021-06-05 05:47:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:14,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:14,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111862686] [2021-06-05 05:47:14,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111862686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:14,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102781804] [2021-06-05 05:47:14,999 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:15,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:15,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102781804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:15,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:15,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731729504] [2021-06-05 05:47:15,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:15,636 INFO L87 Difference]: Start difference. First operand 492 states and 1056 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:19,531 INFO L93 Difference]: Finished difference Result 887 states and 1742 transitions. [2021-06-05 05:47:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 05:47:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:19,532 INFO L225 Difference]: With dead ends: 887 [2021-06-05 05:47:19,532 INFO L226 Difference]: Without dead ends: 867 [2021-06-05 05:47:19,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5722 ImplicationChecksByTransitivity, 3713.2ms TimeCoverageRelationStatistics Valid=2444, Invalid=16188, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 05:47:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-06-05 05:47:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 493. [2021-06-05 05:47:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1504065040650406) internal successors, (1058), 492 states have internal predecessors, (1058), 0 states have call successors, (0), 0 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 05:47:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1058 transitions. [2021-06-05 05:47:19,538 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1058 transitions. Word has length 47 [2021-06-05 05:47:19,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:19,538 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1058 transitions. [2021-06-05 05:47:19,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1058 transitions. [2021-06-05 05:47:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:19,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:19,538 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:19,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 05:47:19,739 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash -110443807, now seen corresponding path program 176 times [2021-06-05 05:47:19,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:19,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827705855] [2021-06-05 05:47:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:20,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:20,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827705855] [2021-06-05 05:47:20,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827705855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:20,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823602362] [2021-06-05 05:47:20,054 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:20,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:20,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:20,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:20,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823602362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:20,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:20,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:20,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411229247] [2021-06-05 05:47:20,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:20,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:20,690 INFO L87 Difference]: Start difference. First operand 493 states and 1058 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:23,551 INFO L93 Difference]: Finished difference Result 958 states and 1874 transitions. [2021-06-05 05:47:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 05:47:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:23,552 INFO L225 Difference]: With dead ends: 958 [2021-06-05 05:47:23,552 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 05:47:23,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 2835.2ms TimeCoverageRelationStatistics Valid=1615, Invalid=12665, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:47:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 05:47:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 499. [2021-06-05 05:47:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.1485943775100402) internal successors, (1070), 498 states have internal predecessors, (1070), 0 states have call successors, (0), 0 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 05:47:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1070 transitions. [2021-06-05 05:47:23,558 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1070 transitions. Word has length 47 [2021-06-05 05:47:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:23,558 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1070 transitions. [2021-06-05 05:47:23,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1070 transitions. [2021-06-05 05:47:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:23,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:23,559 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:23,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 05:47:23,759 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1614018267, now seen corresponding path program 177 times [2021-06-05 05:47:23,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:23,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828282526] [2021-06-05 05:47:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:24,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:24,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828282526] [2021-06-05 05:47:24,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828282526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:24,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440761686] [2021-06-05 05:47:24,080 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:24,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:47:24,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:24,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:24,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:24,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440761686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:24,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:24,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:24,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791731203] [2021-06-05 05:47:24,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:24,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:24,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:24,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:24,724 INFO L87 Difference]: Start difference. First operand 499 states and 1070 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:28,036 INFO L93 Difference]: Finished difference Result 963 states and 1895 transitions. [2021-06-05 05:47:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 05:47:28,036 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:28,037 INFO L225 Difference]: With dead ends: 963 [2021-06-05 05:47:28,037 INFO L226 Difference]: Without dead ends: 907 [2021-06-05 05:47:28,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 2992.5ms TimeCoverageRelationStatistics Valid=1746, Invalid=13754, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 05:47:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-06-05 05:47:28,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 505. [2021-06-05 05:47:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1547619047619047) internal successors, (1086), 504 states have internal predecessors, (1086), 0 states have call successors, (0), 0 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 05:47:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1086 transitions. [2021-06-05 05:47:28,042 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1086 transitions. Word has length 47 [2021-06-05 05:47:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:28,042 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1086 transitions. [2021-06-05 05:47:28,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1086 transitions. [2021-06-05 05:47:28,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:28,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:28,043 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:28,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 05:47:28,244 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:28,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:28,244 INFO L82 PathProgramCache]: Analyzing trace with hash 529666153, now seen corresponding path program 178 times [2021-06-05 05:47:28,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:28,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031315269] [2021-06-05 05:47:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:28,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:28,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031315269] [2021-06-05 05:47:28,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031315269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:28,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252347170] [2021-06-05 05:47:28,588 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:28,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:28,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:28,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:28,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:29,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252347170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:29,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:29,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:29,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726642432] [2021-06-05 05:47:29,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:29,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:29,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:29,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:29,227 INFO L87 Difference]: Start difference. First operand 505 states and 1086 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:32,576 INFO L93 Difference]: Finished difference Result 971 states and 1921 transitions. [2021-06-05 05:47:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 05:47:32,576 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:32,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:32,577 INFO L225 Difference]: With dead ends: 971 [2021-06-05 05:47:32,577 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 05:47:32,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5184 ImplicationChecksByTransitivity, 3179.2ms TimeCoverageRelationStatistics Valid=1898, Invalid=14872, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 05:47:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 05:47:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 511. [2021-06-05 05:47:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.16078431372549) internal successors, (1102), 510 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 05:47:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1102 transitions. [2021-06-05 05:47:32,582 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1102 transitions. Word has length 47 [2021-06-05 05:47:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:32,583 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1102 transitions. [2021-06-05 05:47:32,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1102 transitions. [2021-06-05 05:47:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:32,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:32,583 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:32,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:32,785 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1559828653, now seen corresponding path program 179 times [2021-06-05 05:47:32,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:32,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425732066] [2021-06-05 05:47:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:33,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:33,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425732066] [2021-06-05 05:47:33,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425732066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:33,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365721971] [2021-06-05 05:47:33,124 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:33,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:47:33,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:33,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:33,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365721971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:33,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:33,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:33,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510927455] [2021-06-05 05:47:33,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:33,757 INFO L87 Difference]: Start difference. First operand 511 states and 1102 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:37,581 INFO L93 Difference]: Finished difference Result 979 states and 1947 transitions. [2021-06-05 05:47:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 05:47:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:37,583 INFO L225 Difference]: With dead ends: 979 [2021-06-05 05:47:37,583 INFO L226 Difference]: Without dead ends: 935 [2021-06-05 05:47:37,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5631 ImplicationChecksByTransitivity, 3357.2ms TimeCoverageRelationStatistics Valid=2070, Invalid=16020, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 05:47:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-05 05:47:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 517. [2021-06-05 05:47:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.1666666666666665) internal successors, (1118), 516 states have internal predecessors, (1118), 0 states have call successors, (0), 0 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 05:47:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1118 transitions. [2021-06-05 05:47:37,589 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1118 transitions. Word has length 47 [2021-06-05 05:47:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:37,589 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1118 transitions. [2021-06-05 05:47:37,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1118 transitions. [2021-06-05 05:47:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:37,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:37,589 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:37,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:37,790 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1639095823, now seen corresponding path program 180 times [2021-06-05 05:47:37,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:37,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489967379] [2021-06-05 05:47:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:38,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:38,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489967379] [2021-06-05 05:47:38,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489967379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:38,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518293278] [2021-06-05 05:47:38,137 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:38,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:47:38,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:38,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:38,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:38,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518293278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:38,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:38,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:38,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600224868] [2021-06-05 05:47:38,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:38,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:38,786 INFO L87 Difference]: Start difference. First operand 517 states and 1118 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:42,944 INFO L93 Difference]: Finished difference Result 987 states and 1973 transitions. [2021-06-05 05:47:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 05:47:42,945 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:42,946 INFO L225 Difference]: With dead ends: 987 [2021-06-05 05:47:42,946 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 05:47:42,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6092 ImplicationChecksByTransitivity, 3490.3ms TimeCoverageRelationStatistics Valid=2267, Invalid=17193, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 05:47:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 05:47:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 523. [2021-06-05 05:47:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1724137931034484) internal successors, (1134), 522 states have internal predecessors, (1134), 0 states have call successors, (0), 0 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 05:47:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1134 transitions. [2021-06-05 05:47:42,952 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1134 transitions. Word has length 47 [2021-06-05 05:47:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:42,952 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1134 transitions. [2021-06-05 05:47:42,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1134 transitions. [2021-06-05 05:47:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:42,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:42,952 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:43,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:43,153 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:43,153 INFO L82 PathProgramCache]: Analyzing trace with hash -806671307, now seen corresponding path program 181 times [2021-06-05 05:47:43,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:43,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723380285] [2021-06-05 05:47:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:43,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:43,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723380285] [2021-06-05 05:47:43,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723380285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:43,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441168785] [2021-06-05 05:47:43,546 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:43,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:44,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441168785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:44,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:44,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:44,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933492494] [2021-06-05 05:47:44,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:44,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:44,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:44,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:44,181 INFO L87 Difference]: Start difference. First operand 523 states and 1134 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:48,354 INFO L93 Difference]: Finished difference Result 1095 states and 2169 transitions. [2021-06-05 05:47:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 05:47:48,354 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:48,355 INFO L225 Difference]: With dead ends: 1095 [2021-06-05 05:47:48,355 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 05:47:48,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6417 ImplicationChecksByTransitivity, 3901.9ms TimeCoverageRelationStatistics Valid=2470, Invalid=18122, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 05:47:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 05:47:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 527. [2021-06-05 05:47:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.17680608365019) internal successors, (1145), 526 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 05:47:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1145 transitions. [2021-06-05 05:47:48,362 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1145 transitions. Word has length 47 [2021-06-05 05:47:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:48,362 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1145 transitions. [2021-06-05 05:47:48,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1145 transitions. [2021-06-05 05:47:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:48,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:48,363 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:48,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:48,564 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2071599167, now seen corresponding path program 182 times [2021-06-05 05:47:48,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:48,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372015104] [2021-06-05 05:47:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:48,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372015104] [2021-06-05 05:47:48,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372015104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123976191] [2021-06-05 05:47:48,947 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:48,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:48,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:48,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:49,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123976191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:49,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:49,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:49,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024456562] [2021-06-05 05:47:49,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:49,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:49,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:49,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:49,597 INFO L87 Difference]: Start difference. First operand 527 states and 1145 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:53,691 INFO L93 Difference]: Finished difference Result 945 states and 1898 transitions. [2021-06-05 05:47:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 05:47:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:53,692 INFO L225 Difference]: With dead ends: 945 [2021-06-05 05:47:53,692 INFO L226 Difference]: Without dead ends: 925 [2021-06-05 05:47:53,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5370 ImplicationChecksByTransitivity, 3568.3ms TimeCoverageRelationStatistics Valid=2321, Invalid=15235, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 05:47:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-06-05 05:47:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 505. [2021-06-05 05:47:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1626984126984126) internal successors, (1090), 504 states have internal predecessors, (1090), 0 states have call successors, (0), 0 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 05:47:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1090 transitions. [2021-06-05 05:47:53,698 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1090 transitions. Word has length 47 [2021-06-05 05:47:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:53,698 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1090 transitions. [2021-06-05 05:47:53,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1090 transitions. [2021-06-05 05:47:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:53,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:53,699 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:53,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:53,899 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:53,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:53,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1368922593, now seen corresponding path program 183 times [2021-06-05 05:47:53,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:53,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476630799] [2021-06-05 05:47:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:54,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:54,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476630799] [2021-06-05 05:47:54,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476630799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:54,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000851297] [2021-06-05 05:47:54,224 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:54,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:47:54,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:54,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:54,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:54,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000851297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:54,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:54,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:54,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167551530] [2021-06-05 05:47:54,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:54,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:54,877 INFO L87 Difference]: Start difference. First operand 505 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:58,042 INFO L93 Difference]: Finished difference Result 947 states and 1867 transitions. [2021-06-05 05:47:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 05:47:58,042 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:47:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:58,043 INFO L225 Difference]: With dead ends: 947 [2021-06-05 05:47:58,043 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 05:47:58,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4884 ImplicationChecksByTransitivity, 3027.9ms TimeCoverageRelationStatistics Valid=1731, Invalid=14019, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 05:47:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 05:47:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 509. [2021-06-05 05:47:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.161417322834646) internal successors, (1098), 508 states have internal predecessors, (1098), 0 states have call successors, (0), 0 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 05:47:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1098 transitions. [2021-06-05 05:47:58,049 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1098 transitions. Word has length 47 [2021-06-05 05:47:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:58,049 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1098 transitions. [2021-06-05 05:47:58,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:47:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1098 transitions. [2021-06-05 05:47:58,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:47:58,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:58,050 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:58,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 05:47:58,251 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:58,251 INFO L82 PathProgramCache]: Analyzing trace with hash -782360283, now seen corresponding path program 184 times [2021-06-05 05:47:58,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:58,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097937363] [2021-06-05 05:47:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:58,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097937363] [2021-06-05 05:47:58,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097937363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702878115] [2021-06-05 05:47:58,607 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:58,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:58,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:58,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:47:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:59,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702878115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:59,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:59,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:47:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218075286] [2021-06-05 05:47:59,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:59,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:59,277 INFO L87 Difference]: Start difference. First operand 509 states and 1098 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:02,694 INFO L93 Difference]: Finished difference Result 954 states and 1892 transitions. [2021-06-05 05:48:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 05:48:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:02,696 INFO L225 Difference]: With dead ends: 954 [2021-06-05 05:48:02,696 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 05:48:02,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5322 ImplicationChecksByTransitivity, 3239.1ms TimeCoverageRelationStatistics Valid=1901, Invalid=15129, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 05:48:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 05:48:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 515. [2021-06-05 05:48:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.167315175097276) internal successors, (1114), 514 states have internal predecessors, (1114), 0 states have call successors, (0), 0 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 05:48:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1114 transitions. [2021-06-05 05:48:02,701 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1114 transitions. Word has length 47 [2021-06-05 05:48:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:02,701 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1114 transitions. [2021-06-05 05:48:02,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1114 transitions. [2021-06-05 05:48:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:02,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:02,702 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:02,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 05:48:02,903 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:02,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:02,903 INFO L82 PathProgramCache]: Analyzing trace with hash 247802217, now seen corresponding path program 185 times [2021-06-05 05:48:02,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:02,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926055871] [2021-06-05 05:48:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:03,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:03,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926055871] [2021-06-05 05:48:03,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926055871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:03,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551918215] [2021-06-05 05:48:03,250 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:03,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:48:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:03,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:04,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551918215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:04,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:04,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:04,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601365379] [2021-06-05 05:48:04,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:04,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:04,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:04,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:04,022 INFO L87 Difference]: Start difference. First operand 515 states and 1114 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:07,571 INFO L93 Difference]: Finished difference Result 964 states and 1922 transitions. [2021-06-05 05:48:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 05:48:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:07,572 INFO L225 Difference]: With dead ends: 964 [2021-06-05 05:48:07,572 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 05:48:07,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5770 ImplicationChecksByTransitivity, 3484.7ms TimeCoverageRelationStatistics Valid=2082, Invalid=16278, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 05:48:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 05:48:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 521. [2021-06-05 05:48:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.173076923076923) internal successors, (1130), 520 states have internal predecessors, (1130), 0 states have call successors, (0), 0 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 05:48:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1130 transitions. [2021-06-05 05:48:07,578 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1130 transitions. Word has length 47 [2021-06-05 05:48:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:07,578 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1130 transitions. [2021-06-05 05:48:07,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1130 transitions. [2021-06-05 05:48:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:07,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:07,578 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:07,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:07,779 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:07,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1343845037, now seen corresponding path program 186 times [2021-06-05 05:48:07,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:07,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105960756] [2021-06-05 05:48:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:08,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:08,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105960756] [2021-06-05 05:48:08,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105960756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:08,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96098342] [2021-06-05 05:48:08,136 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:08,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:48:08,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:08,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:08,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96098342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:08,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:08,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:08,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537424724] [2021-06-05 05:48:08,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:08,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:08,777 INFO L87 Difference]: Start difference. First operand 521 states and 1130 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:12,718 INFO L93 Difference]: Finished difference Result 974 states and 1952 transitions. [2021-06-05 05:48:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 05:48:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:12,719 INFO L225 Difference]: With dead ends: 974 [2021-06-05 05:48:12,719 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 05:48:12,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6232 ImplicationChecksByTransitivity, 3553.1ms TimeCoverageRelationStatistics Valid=2288, Invalid=17452, Unknown=0, NotChecked=0, Total=19740 [2021-06-05 05:48:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 05:48:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 527. [2021-06-05 05:48:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.178707224334601) internal successors, (1146), 526 states have internal predecessors, (1146), 0 states have call successors, (0), 0 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 05:48:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1146 transitions. [2021-06-05 05:48:12,725 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1146 transitions. Word has length 47 [2021-06-05 05:48:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:12,725 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1146 transitions. [2021-06-05 05:48:12,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1146 transitions. [2021-06-05 05:48:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:12,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:12,726 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:12,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:12,941 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:12,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2118697743, now seen corresponding path program 187 times [2021-06-05 05:48:12,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:12,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297955342] [2021-06-05 05:48:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:13,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:13,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297955342] [2021-06-05 05:48:13,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297955342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:13,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006164382] [2021-06-05 05:48:13,325 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:13,353 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:13,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006164382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:13,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:13,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:13,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309019977] [2021-06-05 05:48:13,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:13,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:13,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:13,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:13,974 INFO L87 Difference]: Start difference. First operand 527 states and 1146 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:18,186 INFO L93 Difference]: Finished difference Result 1084 states and 2152 transitions. [2021-06-05 05:48:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 05:48:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:18,187 INFO L225 Difference]: With dead ends: 1084 [2021-06-05 05:48:18,187 INFO L226 Difference]: Without dead ends: 1039 [2021-06-05 05:48:18,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6553 ImplicationChecksByTransitivity, 3907.6ms TimeCoverageRelationStatistics Valid=2500, Invalid=18380, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 05:48:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-05 05:48:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 531. [2021-06-05 05:48:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.1830188679245284) internal successors, (1157), 530 states have internal predecessors, (1157), 0 states have call successors, (0), 0 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 05:48:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1157 transitions. [2021-06-05 05:48:18,193 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1157 transitions. Word has length 47 [2021-06-05 05:48:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:18,193 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1157 transitions. [2021-06-05 05:48:18,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1157 transitions. [2021-06-05 05:48:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:18,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:18,194 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:18,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 05:48:18,395 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:18,395 INFO L82 PathProgramCache]: Analyzing trace with hash 911341693, now seen corresponding path program 188 times [2021-06-05 05:48:18,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:18,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889977909] [2021-06-05 05:48:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:18,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889977909] [2021-06-05 05:48:18,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889977909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844484021] [2021-06-05 05:48:18,784 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:18,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:18,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:18,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:18,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:19,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844484021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:19,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:19,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:19,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863233689] [2021-06-05 05:48:19,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:19,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:19,426 INFO L87 Difference]: Start difference. First operand 531 states and 1157 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:23,441 INFO L93 Difference]: Finished difference Result 937 states and 1886 transitions. [2021-06-05 05:48:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 05:48:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:23,444 INFO L225 Difference]: With dead ends: 937 [2021-06-05 05:48:23,444 INFO L226 Difference]: Without dead ends: 917 [2021-06-05 05:48:23,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5494 ImplicationChecksByTransitivity, 3665.5ms TimeCoverageRelationStatistics Valid=2362, Invalid=15460, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 05:48:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-06-05 05:48:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 503. [2021-06-05 05:48:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.1553784860557768) internal successors, (1082), 502 states have internal predecessors, (1082), 0 states have call successors, (0), 0 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 05:48:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1082 transitions. [2021-06-05 05:48:23,450 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1082 transitions. Word has length 47 [2021-06-05 05:48:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:23,450 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1082 transitions. [2021-06-05 05:48:23,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1082 transitions. [2021-06-05 05:48:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:23,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:23,451 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:23,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:23,651 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:23,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1288752927, now seen corresponding path program 189 times [2021-06-05 05:48:23,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:23,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021154645] [2021-06-05 05:48:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:23,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:23,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021154645] [2021-06-05 05:48:23,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021154645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:23,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334162244] [2021-06-05 05:48:23,998 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:24,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:48:24,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:24,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:24,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:24,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334162244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:24,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:24,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:24,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188503120] [2021-06-05 05:48:24,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:24,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:24,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:24,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:24,665 INFO L87 Difference]: Start difference. First operand 503 states and 1082 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:28,187 INFO L93 Difference]: Finished difference Result 924 states and 1824 transitions. [2021-06-05 05:48:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 05:48:28,187 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:28,188 INFO L225 Difference]: With dead ends: 924 [2021-06-05 05:48:28,188 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 05:48:28,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 3296.2ms TimeCoverageRelationStatistics Valid=1879, Invalid=15413, Unknown=0, NotChecked=0, Total=17292 [2021-06-05 05:48:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 05:48:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 507. [2021-06-05 05:48:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.1541501976284585) internal successors, (1090), 506 states have internal predecessors, (1090), 0 states have call successors, (0), 0 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 05:48:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1090 transitions. [2021-06-05 05:48:28,194 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1090 transitions. Word has length 47 [2021-06-05 05:48:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:28,194 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1090 transitions. [2021-06-05 05:48:28,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1090 transitions. [2021-06-05 05:48:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:28,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:28,194 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:28,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 05:48:28,396 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:28,396 INFO L82 PathProgramCache]: Analyzing trace with hash -258590427, now seen corresponding path program 190 times [2021-06-05 05:48:28,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:28,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39199030] [2021-06-05 05:48:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:28,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:28,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39199030] [2021-06-05 05:48:28,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39199030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:28,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750664284] [2021-06-05 05:48:28,810 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:28,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:28,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:28,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:28,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:29,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750664284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:29,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:29,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:29,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216492427] [2021-06-05 05:48:29,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:29,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:29,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:29,468 INFO L87 Difference]: Start difference. First operand 507 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:33,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:33,003 INFO L93 Difference]: Finished difference Result 933 states and 1853 transitions. [2021-06-05 05:48:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 05:48:33,003 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:33,004 INFO L225 Difference]: With dead ends: 933 [2021-06-05 05:48:33,004 INFO L226 Difference]: Without dead ends: 889 [2021-06-05 05:48:33,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 3498.2ms TimeCoverageRelationStatistics Valid=2078, Invalid=16554, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 05:48:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-05 05:48:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 513. [2021-06-05 05:48:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.16015625) internal successors, (1106), 512 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1106 transitions. [2021-06-05 05:48:33,009 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1106 transitions. Word has length 47 [2021-06-05 05:48:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:33,010 INFO L482 AbstractCegarLoop]: Abstraction has 513 states and 1106 transitions. [2021-06-05 05:48:33,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1106 transitions. [2021-06-05 05:48:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:33,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:33,011 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:33,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:33,233 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:33,233 INFO L82 PathProgramCache]: Analyzing trace with hash 837452393, now seen corresponding path program 191 times [2021-06-05 05:48:33,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:33,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968209374] [2021-06-05 05:48:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:33,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:33,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968209374] [2021-06-05 05:48:33,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968209374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:33,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240936568] [2021-06-05 05:48:33,581 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:33,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:48:33,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:33,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:33,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:34,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240936568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:34,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:34,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:34,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105845860] [2021-06-05 05:48:34,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:34,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:34,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:34,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:34,242 INFO L87 Difference]: Start difference. First operand 513 states and 1106 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:38,167 INFO L93 Difference]: Finished difference Result 945 states and 1887 transitions. [2021-06-05 05:48:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 05:48:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:38,168 INFO L225 Difference]: With dead ends: 945 [2021-06-05 05:48:38,168 INFO L226 Difference]: Without dead ends: 907 [2021-06-05 05:48:38,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6385 ImplicationChecksByTransitivity, 3608.3ms TimeCoverageRelationStatistics Valid=2293, Invalid=17729, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 05:48:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-06-05 05:48:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 519. [2021-06-05 05:48:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.166023166023166) internal successors, (1122), 518 states have internal predecessors, (1122), 0 states have call successors, (0), 0 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 05:48:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1122 transitions. [2021-06-05 05:48:38,174 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1122 transitions. Word has length 47 [2021-06-05 05:48:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:38,174 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1122 transitions. [2021-06-05 05:48:38,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1122 transitions. [2021-06-05 05:48:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:38,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:38,175 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:38,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:38,375 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1669876909, now seen corresponding path program 192 times [2021-06-05 05:48:38,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:38,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089296290] [2021-06-05 05:48:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:38,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:38,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089296290] [2021-06-05 05:48:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089296290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352151937] [2021-06-05 05:48:38,772 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:38,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:48:38,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:38,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:38,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:39,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352151937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:39,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:39,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:39,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811548989] [2021-06-05 05:48:39,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:39,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:39,425 INFO L87 Difference]: Start difference. First operand 519 states and 1122 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:43,682 INFO L93 Difference]: Finished difference Result 1057 states and 2091 transitions. [2021-06-05 05:48:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 05:48:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:43,683 INFO L225 Difference]: With dead ends: 1057 [2021-06-05 05:48:43,683 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 05:48:43,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 3989.0ms TimeCoverageRelationStatistics Valid=2514, Invalid=18656, Unknown=0, NotChecked=0, Total=21170 [2021-06-05 05:48:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 05:48:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 523. [2021-06-05 05:48:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1704980842911876) internal successors, (1133), 522 states have internal predecessors, (1133), 0 states have call successors, (0), 0 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 05:48:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1133 transitions. [2021-06-05 05:48:43,689 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1133 transitions. Word has length 47 [2021-06-05 05:48:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:43,689 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1133 transitions. [2021-06-05 05:48:43,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:43,689 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1133 transitions. [2021-06-05 05:48:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:43,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:43,690 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:43,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 05:48:43,890 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash 404949049, now seen corresponding path program 193 times [2021-06-05 05:48:43,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:43,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501100990] [2021-06-05 05:48:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:44,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:44,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501100990] [2021-06-05 05:48:44,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501100990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:44,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002554249] [2021-06-05 05:48:44,276 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:44,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:44,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002554249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:44,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:44,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:44,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305495871] [2021-06-05 05:48:44,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:44,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:44,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1875, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:44,935 INFO L87 Difference]: Start difference. First operand 523 states and 1133 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:48,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:48,821 INFO L93 Difference]: Finished difference Result 913 states and 1830 transitions. [2021-06-05 05:48:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 05:48:48,821 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:48,822 INFO L225 Difference]: With dead ends: 913 [2021-06-05 05:48:48,822 INFO L226 Difference]: Without dead ends: 893 [2021-06-05 05:48:48,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 3762.0ms TimeCoverageRelationStatistics Valid=2386, Invalid=15704, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 05:48:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-06-05 05:48:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 501. [2021-06-05 05:48:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.148) internal successors, (1074), 500 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 05:48:48,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1074 transitions. [2021-06-05 05:48:48,828 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1074 transitions. Word has length 47 [2021-06-05 05:48:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:48,828 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1074 transitions. [2021-06-05 05:48:48,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1074 transitions. [2021-06-05 05:48:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:48,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:48,829 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:49,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 05:48:49,029 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:49,030 INFO L82 PathProgramCache]: Analyzing trace with hash -308279327, now seen corresponding path program 194 times [2021-06-05 05:48:49,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:49,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616706361] [2021-06-05 05:48:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:49,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:49,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616706361] [2021-06-05 05:48:49,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616706361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:49,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579685908] [2021-06-05 05:48:49,378 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:49,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:49,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:49,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:49,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:50,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579685908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:50,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:50,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:48:50,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477930746] [2021-06-05 05:48:50,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:48:50,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:48:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:50,024 INFO L87 Difference]: Start difference. First operand 501 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:53,846 INFO L93 Difference]: Finished difference Result 901 states and 1781 transitions. [2021-06-05 05:48:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 05:48:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:53,847 INFO L225 Difference]: With dead ends: 901 [2021-06-05 05:48:53,847 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 05:48:53,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6064 ImplicationChecksByTransitivity, 3468.1ms TimeCoverageRelationStatistics Valid=2049, Invalid=16857, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 05:48:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 05:48:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 505. [2021-06-05 05:48:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1468253968253967) internal successors, (1082), 504 states have internal predecessors, (1082), 0 states have call successors, (0), 0 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 05:48:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1082 transitions. [2021-06-05 05:48:53,852 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1082 transitions. Word has length 47 [2021-06-05 05:48:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:53,852 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1082 transitions. [2021-06-05 05:48:53,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1082 transitions. [2021-06-05 05:48:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:53,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:53,853 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:54,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 05:48:54,053 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash 787763493, now seen corresponding path program 195 times [2021-06-05 05:48:54,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:54,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976017091] [2021-06-05 05:48:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:54,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:54,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976017091] [2021-06-05 05:48:54,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976017091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:54,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113495934] [2021-06-05 05:48:54,396 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:54,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:48:54,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:54,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 05:48:54,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:55,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113495934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:55,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:55,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-06-05 05:48:55,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495497828] [2021-06-05 05:48:55,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 05:48:55,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:55,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 05:48:55,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:48:55,091 INFO L87 Difference]: Start difference. First operand 505 states and 1082 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:58,965 INFO L93 Difference]: Finished difference Result 907 states and 1805 transitions. [2021-06-05 05:48:58,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 05:48:58,965 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:48:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:58,966 INFO L225 Difference]: With dead ends: 907 [2021-06-05 05:48:58,966 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 05:48:58,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6572 ImplicationChecksByTransitivity, 3633.0ms TimeCoverageRelationStatistics Valid=2282, Invalid=18024, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 05:48:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 05:48:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 510. [2021-06-05 05:48:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.1532416502946954) internal successors, (1096), 509 states have internal predecessors, (1096), 0 states have call successors, (0), 0 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 05:48:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1096 transitions. [2021-06-05 05:48:58,973 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1096 transitions. Word has length 47 [2021-06-05 05:48:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:58,973 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1096 transitions. [2021-06-05 05:48:58,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:48:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1096 transitions. [2021-06-05 05:48:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:48:58,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:58,974 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:59,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 05:48:59,174 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:59,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1620188009, now seen corresponding path program 196 times [2021-06-05 05:48:59,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:59,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505331171] [2021-06-05 05:48:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:59,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:59,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505331171] [2021-06-05 05:48:59,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505331171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610249823] [2021-06-05 05:48:59,568 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:59,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:59,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:59,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:59,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:00,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610249823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:00,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:00,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:49:00,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464556117] [2021-06-05 05:49:00,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:49:00,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:00,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:49:00,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:00,220 INFO L87 Difference]: Start difference. First operand 510 states and 1096 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:04,525 INFO L93 Difference]: Finished difference Result 1031 states and 2030 transitions. [2021-06-05 05:49:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 05:49:04,526 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:49:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:04,527 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 05:49:04,527 INFO L226 Difference]: Without dead ends: 977 [2021-06-05 05:49:04,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6988 ImplicationChecksByTransitivity, 4074.9ms TimeCoverageRelationStatistics Valid=2535, Invalid=19221, Unknown=0, NotChecked=0, Total=21756 [2021-06-05 05:49:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-06-05 05:49:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 515. [2021-06-05 05:49:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.157587548638132) internal successors, (1109), 514 states have internal predecessors, (1109), 0 states have call successors, (0), 0 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 05:49:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1109 transitions. [2021-06-05 05:49:04,532 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1109 transitions. Word has length 47 [2021-06-05 05:49:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:04,532 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1109 transitions. [2021-06-05 05:49:04,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1109 transitions. [2021-06-05 05:49:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:49:04,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:04,533 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:04,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 05:49:04,733 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:04,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:04,734 INFO L82 PathProgramCache]: Analyzing trace with hash 355260149, now seen corresponding path program 197 times [2021-06-05 05:49:04,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:04,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986331086] [2021-06-05 05:49:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:05,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:05,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986331086] [2021-06-05 05:49:05,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986331086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:05,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126234855] [2021-06-05 05:49:05,115 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:05,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:49:05,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:05,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:49:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:05,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126234855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:05,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:05,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:49:05,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932683468] [2021-06-05 05:49:05,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:49:05,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:05,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:49:05,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:05,774 INFO L87 Difference]: Start difference. First operand 515 states and 1109 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:09,962 INFO L93 Difference]: Finished difference Result 881 states and 1758 transitions. [2021-06-05 05:49:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 05:49:09,963 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:49:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:09,964 INFO L225 Difference]: With dead ends: 881 [2021-06-05 05:49:09,964 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 05:49:09,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5783 ImplicationChecksByTransitivity, 3788.5ms TimeCoverageRelationStatistics Valid=2393, Invalid=15967, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 05:49:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 05:49:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 499. [2021-06-05 05:49:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.140562248995984) internal successors, (1066), 498 states have internal predecessors, (1066), 0 states have call successors, (0), 0 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 05:49:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1066 transitions. [2021-06-05 05:49:09,969 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1066 transitions. Word has length 47 [2021-06-05 05:49:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:09,969 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1066 transitions. [2021-06-05 05:49:09,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1066 transitions. [2021-06-05 05:49:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:49:09,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:09,970 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:10,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 05:49:10,170 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:10,171 INFO L82 PathProgramCache]: Analyzing trace with hash -329605407, now seen corresponding path program 198 times [2021-06-05 05:49:10,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:10,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490355965] [2021-06-05 05:49:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:10,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:10,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490355965] [2021-06-05 05:49:10,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490355965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046078066] [2021-06-05 05:49:10,512 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:10,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:49:10,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:10,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:49:10,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:11,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046078066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:11,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:11,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:49:11,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856386056] [2021-06-05 05:49:11,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:49:11,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:11,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:49:11,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:11,169 INFO L87 Difference]: Start difference. First operand 499 states and 1066 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:15,296 INFO L93 Difference]: Finished difference Result 858 states and 1689 transitions. [2021-06-05 05:49:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 05:49:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:49:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:15,297 INFO L225 Difference]: With dead ends: 858 [2021-06-05 05:49:15,297 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 05:49:15,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 3668.2ms TimeCoverageRelationStatistics Valid=2246, Invalid=18346, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 05:49:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 05:49:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 503. [2021-06-05 05:49:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.139442231075697) internal successors, (1074), 502 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 05:49:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1074 transitions. [2021-06-05 05:49:15,302 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1074 transitions. Word has length 47 [2021-06-05 05:49:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:15,302 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1074 transitions. [2021-06-05 05:49:15,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1074 transitions. [2021-06-05 05:49:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:49:15,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:15,303 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:15,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:15,504 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash 502819109, now seen corresponding path program 199 times [2021-06-05 05:49:15,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:15,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515483496] [2021-06-05 05:49:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:15,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515483496] [2021-06-05 05:49:15,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515483496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498249635] [2021-06-05 05:49:15,886 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:15,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:49:15,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:16,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498249635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:16,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:16,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:49:16,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264540345] [2021-06-05 05:49:16,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:49:16,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:16,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:49:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:16,539 INFO L87 Difference]: Start difference. First operand 503 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:21,095 INFO L93 Difference]: Finished difference Result 963 states and 1875 transitions. [2021-06-05 05:49:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 05:49:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:49:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:21,096 INFO L225 Difference]: With dead ends: 963 [2021-06-05 05:49:21,096 INFO L226 Difference]: Without dead ends: 918 [2021-06-05 05:49:21,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7057 ImplicationChecksByTransitivity, 4032.3ms TimeCoverageRelationStatistics Valid=2494, Invalid=19262, Unknown=0, NotChecked=0, Total=21756 [2021-06-05 05:49:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-06-05 05:49:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 505. [2021-06-05 05:49:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.140873015873016) internal successors, (1079), 504 states have internal predecessors, (1079), 0 states have call successors, (0), 0 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 05:49:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1079 transitions. [2021-06-05 05:49:21,102 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1079 transitions. Word has length 47 [2021-06-05 05:49:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:21,102 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1079 transitions. [2021-06-05 05:49:21,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1079 transitions. [2021-06-05 05:49:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:49:21,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:21,103 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:21,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 05:49:21,303 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:21,304 INFO L82 PathProgramCache]: Analyzing trace with hash -762108751, now seen corresponding path program 200 times [2021-06-05 05:49:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:21,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183494208] [2021-06-05 05:49:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:21,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:21,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183494208] [2021-06-05 05:49:21,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183494208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:21,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143946092] [2021-06-05 05:49:21,694 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:21,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:21,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:21,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:49:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:22,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143946092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:22,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:22,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:49:22,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602607083] [2021-06-05 05:49:22,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:49:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:49:22,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:22,354 INFO L87 Difference]: Start difference. First operand 505 states and 1079 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:26,459 INFO L93 Difference]: Finished difference Result 845 states and 1674 transitions. [2021-06-05 05:49:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 05:49:26,460 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:49:26,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:26,460 INFO L225 Difference]: With dead ends: 845 [2021-06-05 05:49:26,461 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 05:49:26,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5942 ImplicationChecksByTransitivity, 3818.8ms TimeCoverageRelationStatistics Valid=2384, Invalid=16248, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 05:49:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 05:49:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 493. [2021-06-05 05:49:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1260162601626016) internal successors, (1046), 492 states have internal predecessors, (1046), 0 states have call successors, (0), 0 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 05:49:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1046 transitions. [2021-06-05 05:49:26,466 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1046 transitions. Word has length 47 [2021-06-05 05:49:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:26,466 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1046 transitions. [2021-06-05 05:49:26,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1046 transitions. [2021-06-05 05:49:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:49:26,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:26,467 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:26,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:26,667 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1227950623, now seen corresponding path program 201 times [2021-06-05 05:49:26,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:26,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970588860] [2021-06-05 05:49:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:26,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:26,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970588860] [2021-06-05 05:49:26,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970588860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:26,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481969699] [2021-06-05 05:49:26,984 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:27,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:49:27,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:27,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:49:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:27,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481969699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:27,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:27,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:49:27,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234410389] [2021-06-05 05:49:27,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:49:27,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:49:27,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:27,657 INFO L87 Difference]: Start difference. First operand 493 states and 1046 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:32,510 INFO L93 Difference]: Finished difference Result 986 states and 1986 transitions. [2021-06-05 05:49:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 05:49:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:49:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:32,512 INFO L225 Difference]: With dead ends: 986 [2021-06-05 05:49:32,512 INFO L226 Difference]: Without dead ends: 938 [2021-06-05 05:49:32,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8617 ImplicationChecksByTransitivity, 4591.0ms TimeCoverageRelationStatistics Valid=2834, Invalid=22606, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 05:49:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-05 05:49:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 509. [2021-06-05 05:49:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.127952755905512) internal successors, (1081), 508 states have internal predecessors, (1081), 0 states have call successors, (0), 0 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 05:49:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1081 transitions. [2021-06-05 05:49:32,518 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1081 transitions. Word has length 47 [2021-06-05 05:49:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:32,518 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1081 transitions. [2021-06-05 05:49:32,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1081 transitions. [2021-06-05 05:49:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:49:32,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:32,519 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:32,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:32,719 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1802088813, now seen corresponding path program 202 times [2021-06-05 05:49:32,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:32,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511870285] [2021-06-05 05:49:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:33,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:33,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511870285] [2021-06-05 05:49:33,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511870285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:33,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319831021] [2021-06-05 05:49:33,038 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:33,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:33,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:33,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:49:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:33,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319831021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:33,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:33,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 05:49:33,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29307617] [2021-06-05 05:49:33,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:49:33,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:49:33,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:33,681 INFO L87 Difference]: Start difference. First operand 509 states and 1081 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:38,218 INFO L93 Difference]: Finished difference Result 1017 states and 2034 transitions. [2021-06-05 05:49:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 05:49:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2021-06-05 05:49:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:38,219 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 05:49:38,219 INFO L226 Difference]: Without dead ends: 969 [2021-06-05 05:49:38,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6758 ImplicationChecksByTransitivity, 3877.0ms TimeCoverageRelationStatistics Valid=2550, Invalid=18330, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 05:49:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-06-05 05:49:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 506. [2021-06-05 05:49:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.120792079207921) internal successors, (1071), 505 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 05:49:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1071 transitions. [2021-06-05 05:49:38,225 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1071 transitions. Word has length 47 [2021-06-05 05:49:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:38,225 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1071 transitions. [2021-06-05 05:49:38,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 05:49:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1071 transitions. [2021-06-05 05:49:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:49:38,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:38,226 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:38,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:38,426 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:38,426 INFO L82 PathProgramCache]: Analyzing trace with hash 635930283, now seen corresponding path program 203 times [2021-06-05 05:49:38,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:38,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515887061] [2021-06-05 05:49:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:38,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:38,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515887061] [2021-06-05 05:49:38,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515887061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:38,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513175466] [2021-06-05 05:49:38,838 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:38,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 05:49:38,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:38,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:49:38,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:39,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513175466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:39,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:39,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2021-06-05 05:49:39,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407575334] [2021-06-05 05:49:39,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:49:39,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:49:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:49:39,570 INFO L87 Difference]: Start difference. First operand 506 states and 1071 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:47,536 INFO L93 Difference]: Finished difference Result 1005 states and 2058 transitions. [2021-06-05 05:49:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 05:49:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:49:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:47,537 INFO L225 Difference]: With dead ends: 1005 [2021-06-05 05:49:47,537 INFO L226 Difference]: Without dead ends: 979 [2021-06-05 05:49:47,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8517 ImplicationChecksByTransitivity, 6924.6ms TimeCoverageRelationStatistics Valid=1668, Invalid=22202, Unknown=0, NotChecked=0, Total=23870 [2021-06-05 05:49:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-06-05 05:49:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 479. [2021-06-05 05:49:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1297071129707112) internal successors, (1018), 478 states have internal predecessors, (1018), 0 states have call successors, (0), 0 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 05:49:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1018 transitions. [2021-06-05 05:49:47,543 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1018 transitions. Word has length 47 [2021-06-05 05:49:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:47,543 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1018 transitions. [2021-06-05 05:49:47,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1018 transitions. [2021-06-05 05:49:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:49:47,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:47,543 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:47,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 05:49:47,744 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:47,744 INFO L82 PathProgramCache]: Analyzing trace with hash -820206049, now seen corresponding path program 204 times [2021-06-05 05:49:47,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:47,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849692530] [2021-06-05 05:49:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:49:47,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:47,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849692530] [2021-06-05 05:49:47,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849692530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:47,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876046456] [2021-06-05 05:49:47,832 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:47,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:49:47,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 05:49:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:49:47,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876046456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:47,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:47,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 05:49:47,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422190049] [2021-06-05 05:49:47,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:49:47,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:47,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:49:47,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:49:47,941 INFO L87 Difference]: Start difference. First operand 479 states and 1018 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 05:49:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:48,153 INFO L93 Difference]: Finished difference Result 794 states and 1629 transitions. [2021-06-05 05:49:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:49:48,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 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 49 [2021-06-05 05:49:48,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:48,154 INFO L225 Difference]: With dead ends: 794 [2021-06-05 05:49:48,154 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 05:49:48,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:49:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 05:49:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 539. [2021-06-05 05:49:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.1282527881040894) internal successors, (1145), 538 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 05:49:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1145 transitions. [2021-06-05 05:49:48,159 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1145 transitions. Word has length 49 [2021-06-05 05:49:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:48,159 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1145 transitions. [2021-06-05 05:49:48,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 05:49:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1145 transitions. [2021-06-05 05:49:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:49:48,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:48,159 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:48,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:48,360 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:48,360 INFO L82 PathProgramCache]: Analyzing trace with hash -300420567, now seen corresponding path program 205 times [2021-06-05 05:49:48,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:48,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779647579] [2021-06-05 05:49:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:48,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:48,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779647579] [2021-06-05 05:49:48,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779647579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:48,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810677168] [2021-06-05 05:49:48,838 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:48,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2021-06-05 05:49:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:49,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810677168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:49,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:49,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-06-05 05:49:49,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555733752] [2021-06-05 05:49:49,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 05:49:49,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:49,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 05:49:49,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:49:49,661 INFO L87 Difference]: Start difference. First operand 539 states and 1145 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 05:49:57,388 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 05:49:57,579 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 05:49:58,941 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 05:50:02,939 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 05:50:03,110 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 05:50:03,286 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 05:50:03,502 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 Received shutdown request... [2021-06-05 05:50:04,264 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-06-05 05:50:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-06-05 05:50:04,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 05:50:04,464 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:50:04,466 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:50:04,467 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:50:04,467 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:50:04 BasicIcfg [2021-06-05 05:50:04,467 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:50:04,468 INFO L168 Benchmark]: Toolchain (without parser) took 739413.37 ms. Allocated memory was 341.8 MB in the beginning and 595.6 MB in the end (delta: 253.8 MB). Free memory was 321.5 MB in the beginning and 332.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 242.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:50:04,468 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 341.8 MB. Free memory was 322.7 MB in the beginning and 322.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:50:04,468 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.03 ms. Allocated memory is still 341.8 MB. Free memory was 321.5 MB in the beginning and 320.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:50:04,468 INFO L168 Benchmark]: Boogie Preprocessor took 13.67 ms. Allocated memory is still 341.8 MB. Free memory was 320.0 MB in the beginning and 319.1 MB in the end (delta: 915.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:50:04,468 INFO L168 Benchmark]: RCFGBuilder took 227.76 ms. Allocated memory is still 341.8 MB. Free memory was 319.0 MB in the beginning and 307.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 05:50:04,468 INFO L168 Benchmark]: TraceAbstraction took 739145.31 ms. Allocated memory was 341.8 MB in the beginning and 595.6 MB in the end (delta: 253.8 MB). Free memory was 307.3 MB in the beginning and 332.9 MB in the end (delta: -25.6 MB). Peak memory consumption was 227.9 MB. Max. memory is 16.0 GB. [2021-06-05 05:50:04,469 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 0.16 ms. Allocated memory is still 341.8 MB. Free memory was 322.7 MB in the beginning and 322.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.03 ms. Allocated memory is still 341.8 MB. Free memory was 321.5 MB in the beginning and 320.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.67 ms. Allocated memory is still 341.8 MB. Free memory was 320.0 MB in the beginning and 319.1 MB in the end (delta: 915.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 227.76 ms. Allocated memory is still 341.8 MB. Free memory was 319.0 MB in the beginning and 307.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 739145.31 ms. Allocated memory was 341.8 MB in the beginning and 595.6 MB in the end (delta: 253.8 MB). Free memory was 307.3 MB in the beginning and 332.9 MB in the end (delta: -25.6 MB). Peak memory consumption was 227.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (539states) and FLOYD_HOARE automaton (currently 206 states, 48 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 44ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (539states) and FLOYD_HOARE automaton (currently 206 states, 48 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 44ms.. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (539states) and FLOYD_HOARE automaton (currently 206 states, 48 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 44ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 739055.5ms, OverallIterations: 207, TraceHistogramMax: 9, EmptinessCheckTime: 128.9ms, AutomataDifference: 544138.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9292 SDtfs, 56131 SDslu, 151758 SDs, 0 SdLazy, 353608 SolverSat, 16223 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 119977.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23420 GetRequests, 3990 SyntacticMatches, 249 SemanticMatches, 19180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704857 ImplicationChecksByTransitivity, 511199.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=933occurred in iteration=146, InterpolantAutomatonStates: 15278, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1192.7ms AutomataMinimizationTime, 206 MinimizatonAttempts, 66024 StatesRemovedByMinimization, 206 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 619.7ms SsaConstructionTime, 2786.1ms SatisfiabilityAnalysisTime, 144002.7ms InterpolantComputationTime, 14770 NumberOfCodeBlocks, 14770 NumberOfCodeBlocksAsserted, 1022 NumberOfCheckSat, 14358 ConstructedInterpolants, 0 QuantifiedInterpolants, 215413 SizeOfPredicates, 995 NumberOfNonLiveVariables, 16475 ConjunctsInSsa, 10115 ConjunctsInUnsatCore, 412 InterpolantComputations, 2 PerfectInterpolantSequences, 3838/26655 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown