/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.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:10:54,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:10:54,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:10:54,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:10:54,831 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 [2021-05-21 21:10:54,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:10:54,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:10:54,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:10:54,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:10:54,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:10:54,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:10:54,862 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:10:54,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:10:54,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:10:54,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:10:54,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:10:54,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:10:54,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:10:54,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:10:54,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:10:54,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:10:54,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:10:54,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:10:54,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:10:54,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:10:54,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:10:54,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:10:54,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:10:54,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:10:54,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:10:54,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:10:54,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:10:54,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:10:54,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:10:54,865 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:10:54,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:10:54,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:10:55,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:10:55,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:10:55,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:10:55,167 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:10:55,168 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:10:55,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-05-21 21:10:55,169 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-05-21 21:10:55,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:10:55,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:10:55,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:10:55,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:10:55,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:10:55,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:10:55,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:10:55,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:10:55,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:10:55,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/1) ... [2021-05-21 21:10:55,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:10:55,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:10:55,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:10:55,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:10:55,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (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 [2021-05-21 21:10:55,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:10:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:10:55,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:10:55,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:10:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:10:55,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:10:55,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:10:55,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:10:55,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:10:55,319 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:10:55,428 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:10:55,428 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:10:55,429 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:10:55 BoogieIcfgContainer [2021-05-21 21:10:55,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:10:55,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:10:55,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:10:55,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:10:55,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:55" (1/2) ... [2021-05-21 21:10:55,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76290bdd and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:10:55, skipping insertion in model container [2021-05-21 21:10:55,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:10:55" (2/2) ... [2021-05-21 21:10:55,434 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-05-21 21:10:55,438 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:10:55,438 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:10:55,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:10:55,439 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:10:55,458 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-21 21:10:55,472 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 21:10:55,519 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:10:55,519 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:10:55,520 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:10:55,520 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:10:55,520 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:10:55,520 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:10:55,520 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:10:55,520 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:10:55,526 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-21 21:10:55,533 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) [2021-05-21 21:10:55,534 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) [2021-05-21 21:10:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 21:10:55,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:55,539 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:55,539 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-05-21 21:10:55,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:55,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436105043] [2021-05-21 21:10:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:55,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:55,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436105043] [2021-05-21 21:10:55,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436105043] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:10:55,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:10:55,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:10:55,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172766645] [2021-05-21 21:10:55,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:10:55,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:55,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:10:55,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:10:55,703 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:55,748 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-05-21 21:10:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:10:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 21:10:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:55,755 INFO L225 Difference]: With dead ends: 43 [2021-05-21 21:10:55,756 INFO L226 Difference]: Without dead ends: 43 [2021-05-21 21:10:55,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:10:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-21 21:10:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-05-21 21:10:55,786 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) [2021-05-21 21:10:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-05-21 21:10:55,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-05-21 21:10:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:55,789 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-05-21 21:10:55,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-05-21 21:10:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 21:10:55,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:55,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:55,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:10:55,791 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-05-21 21:10:55,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:55,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785273078] [2021-05-21 21:10:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:10:55,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:55,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785273078] [2021-05-21 21:10:55,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785273078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:10:55,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:10:55,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:10:55,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659894103] [2021-05-21 21:10:55,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:10:55,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:55,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:10:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:10:55,884 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:55,917 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-05-21 21:10:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:10:55,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 21:10:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:55,922 INFO L225 Difference]: With dead ends: 50 [2021-05-21 21:10:55,922 INFO L226 Difference]: Without dead ends: 50 [2021-05-21 21:10:55,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:10:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-21 21:10:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-05-21 21:10:55,938 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) [2021-05-21 21:10:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-05-21 21:10:55,940 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-05-21 21:10:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:55,940 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-05-21 21:10:55,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-05-21 21:10:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:10:55,941 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:55,941 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:55,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:10:55,942 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-05-21 21:10:55,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:55,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990051875] [2021-05-21 21:10:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:56,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:56,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990051875] [2021-05-21 21:10:56,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990051875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:56,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169226408] [2021-05-21 21:10:56,044 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 [2021-05-21 21:10:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:56,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:10:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:56,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169226408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:56,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:56,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-21 21:10:56,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930118818] [2021-05-21 21:10:56,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:10:56,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:56,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:10:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:10:56,222 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-05-21 21:10:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:56,251 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-05-21 21:10:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 21:10:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 19 [2021-05-21 21:10:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:56,254 INFO L225 Difference]: With dead ends: 99 [2021-05-21 21:10:56,256 INFO L226 Difference]: Without dead ends: 78 [2021-05-21 21:10:56,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:10:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-21 21:10:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-05-21 21:10:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-05-21 21:10:56,261 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-05-21 21:10:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:56,261 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-05-21 21:10:56,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-05-21 21:10:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-05-21 21:10:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:10:56,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:56,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:56,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-21 21:10:56,480 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-05-21 21:10:56,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:56,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74943372] [2021-05-21 21:10:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:56,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:56,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74943372] [2021-05-21 21:10:56,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74943372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:56,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472609274] [2021-05-21 21:10:56,515 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 [2021-05-21 21:10:56,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:56,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:56,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:10:56,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:56,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472609274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:56,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:56,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:10:56,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080889887] [2021-05-21 21:10:56,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:10:56,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:10:56,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:10:56,685 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-05-21 21:10:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:56,739 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-05-21 21:10:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:10:56,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:10:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:56,740 INFO L225 Difference]: With dead ends: 80 [2021-05-21 21:10:56,740 INFO L226 Difference]: Without dead ends: 77 [2021-05-21 21:10:56,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:10:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-21 21:10:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-05-21 21:10:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-05-21 21:10:56,745 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-05-21 21:10:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:56,745 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-05-21 21:10:56,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-05-21 21:10:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-05-21 21:10:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:56,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:56,746 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:56,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:56,961 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:56,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-05-21 21:10:56,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:56,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741175693] [2021-05-21 21:10:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:57,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741175693] [2021-05-21 21:10:57,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741175693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278749808] [2021-05-21 21:10:57,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:10:57,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:10:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:10:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:57,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278749808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:57,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:57,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 21:10:57,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285199821] [2021-05-21 21:10:57,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:10:57,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:10:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:10:57,230 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:57,520 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-05-21 21:10:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:10:57,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:57,521 INFO L225 Difference]: With dead ends: 198 [2021-05-21 21:10:57,521 INFO L226 Difference]: Without dead ends: 192 [2021-05-21 21:10:57,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:10:57,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-21 21:10:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-05-21 21:10:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-05-21 21:10:57,528 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-05-21 21:10:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:57,529 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-05-21 21:10:57,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-05-21 21:10:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:57,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:57,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:57,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:57,731 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-05-21 21:10:57,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:57,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298163759] [2021-05-21 21:10:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:57,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:57,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298163759] [2021-05-21 21:10:57,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298163759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:57,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541854943] [2021-05-21 21:10:57,785 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 [2021-05-21 21:10:57,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:57,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:57,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:10:57,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:57,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541854943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:57,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:57,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-05-21 21:10:57,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891795614] [2021-05-21 21:10:57,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:10:57,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:57,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:10:57,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:10:57,941 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:58,228 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-05-21 21:10:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:10:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:58,230 INFO L225 Difference]: With dead ends: 170 [2021-05-21 21:10:58,230 INFO L226 Difference]: Without dead ends: 166 [2021-05-21 21:10:58,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:10:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-21 21:10:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-05-21 21:10:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-05-21 21:10:58,250 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-05-21 21:10:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:58,250 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-05-21 21:10:58,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-05-21 21:10:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:58,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:58,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:58,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:58,469 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-05-21 21:10:58,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:58,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143268938] [2021-05-21 21:10:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:58,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143268938] [2021-05-21 21:10:58,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143268938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757405384] [2021-05-21 21:10:58,525 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 [2021-05-21 21:10:58,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:10:58,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:10:58,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:58,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757405384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:58,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:58,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 21:10:58,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022879413] [2021-05-21 21:10:58,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:10:58,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:58,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:10:58,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:10:58,646 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2021-05-21 21:10:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:58,667 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-05-21 21:10:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:10:58,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 23 [2021-05-21 21:10:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:58,669 INFO L225 Difference]: With dead ends: 190 [2021-05-21 21:10:58,669 INFO L226 Difference]: Without dead ends: 163 [2021-05-21 21:10:58,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:10:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-21 21:10:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-05-21 21:10:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-05-21 21:10:58,673 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-05-21 21:10:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:58,673 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-05-21 21:10:58,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2021-05-21 21:10:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-05-21 21:10:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:58,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:58,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:58,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:58,893 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-05-21 21:10:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:58,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225880845] [2021-05-21 21:10:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:59,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:59,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225880845] [2021-05-21 21:10:59,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225880845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:59,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520347326] [2021-05-21 21:10:59,001 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 [2021-05-21 21:10:59,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:10:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:59,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:10:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:59,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520347326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:59,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:59,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-21 21:10:59,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887233103] [2021-05-21 21:10:59,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:10:59,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:10:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:10:59,152 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:59,553 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-05-21 21:10:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:10:59,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:10:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:59,557 INFO L225 Difference]: With dead ends: 320 [2021-05-21 21:10:59,557 INFO L226 Difference]: Without dead ends: 302 [2021-05-21 21:10:59,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:10:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-21 21:10:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-05-21 21:10:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-05-21 21:10:59,567 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-05-21 21:10:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:59,567 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-05-21 21:10:59,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-05-21 21:10:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:59,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:59,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:59,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:59,785 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-05-21 21:10:59,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:59,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481335280] [2021-05-21 21:10:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:59,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:59,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481335280] [2021-05-21 21:10:59,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481335280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:59,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251153678] [2021-05-21 21:10:59,848 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 [2021-05-21 21:10:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:59,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:10:59,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:00,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251153678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:00,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:00,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-21 21:11:00,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882509814] [2021-05-21 21:11:00,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:11:00,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:00,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:11:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:11:00,040 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:00,325 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-05-21 21:11:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:11:00,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:11:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:00,327 INFO L225 Difference]: With dead ends: 321 [2021-05-21 21:11:00,327 INFO L226 Difference]: Without dead ends: 317 [2021-05-21 21:11:00,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:11:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-21 21:11:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-05-21 21:11:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-05-21 21:11:00,333 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-05-21 21:11:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:00,333 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-05-21 21:11:00,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-05-21 21:11:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:00,334 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:00,334 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:00,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 21:11:00,537 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-05-21 21:11:00,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:00,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313861897] [2021-05-21 21:11:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:00,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:00,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313861897] [2021-05-21 21:11:00,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313861897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:00,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26005827] [2021-05-21 21:11:00,607 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 [2021-05-21 21:11:00,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:00,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:11:00,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:00,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26005827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:00,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:00,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-21 21:11:00,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263274620] [2021-05-21 21:11:00,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 21:11:00,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 21:11:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:11:00,838 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:01,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:01,326 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-05-21 21:11:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 21:11:01,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:01,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:01,328 INFO L225 Difference]: With dead ends: 435 [2021-05-21 21:11:01,328 INFO L226 Difference]: Without dead ends: 417 [2021-05-21 21:11:01,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 450.0ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 21:11:01,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-21 21:11:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-05-21 21:11:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-05-21 21:11:01,334 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-05-21 21:11:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:01,334 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-05-21 21:11:01,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-05-21 21:11:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:01,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:01,335 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:01,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-21 21:11:01,549 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-05-21 21:11:01,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:01,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768399183] [2021-05-21 21:11:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:01,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:01,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768399183] [2021-05-21 21:11:01,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768399183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:01,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303997440] [2021-05-21 21:11:01,593 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 [2021-05-21 21:11:01,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:11:01,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:01,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:11:01,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:01,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303997440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:01,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:01,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-05-21 21:11:01,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521456496] [2021-05-21 21:11:01,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:11:01,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:01,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:11:01,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:11:01,777 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:02,185 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-05-21 21:11:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 21:11:02,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:02,187 INFO L225 Difference]: With dead ends: 340 [2021-05-21 21:11:02,187 INFO L226 Difference]: Without dead ends: 336 [2021-05-21 21:11:02,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:11:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-21 21:11:02,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-05-21 21:11:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-05-21 21:11:02,192 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-05-21 21:11:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:02,192 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-05-21 21:11:02,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-05-21 21:11:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:02,192 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:02,192 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:02,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:02,405 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-05-21 21:11:02,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:02,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641161339] [2021-05-21 21:11:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:02,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:02,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641161339] [2021-05-21 21:11:02,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641161339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:02,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442370815] [2021-05-21 21:11:02,451 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 [2021-05-21 21:11:02,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:02,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:02,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:11:02,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:02,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442370815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:02,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:02,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 21:11:02,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529751958] [2021-05-21 21:11:02,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:11:02,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:11:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:11:02,523 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-05-21 21:11:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:02,548 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-05-21 21:11:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:11:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 27 [2021-05-21 21:11:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:02,550 INFO L225 Difference]: With dead ends: 354 [2021-05-21 21:11:02,550 INFO L226 Difference]: Without dead ends: 321 [2021-05-21 21:11:02,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:11:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-21 21:11:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-05-21 21:11:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-05-21 21:11:02,555 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-05-21 21:11:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:02,556 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-05-21 21:11:02,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-05-21 21:11:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-05-21 21:11:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:02,556 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:02,556 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:02,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:02,777 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-05-21 21:11:02,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:02,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187247970] [2021-05-21 21:11:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:02,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:02,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187247970] [2021-05-21 21:11:02,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187247970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:02,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54072563] [2021-05-21 21:11:02,888 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 [2021-05-21 21:11:02,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:11:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:11:02,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:03,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54072563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:03,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:03,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 21:11:03,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127019852] [2021-05-21 21:11:03,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:11:03,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:11:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:11:03,106 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:03,828 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-05-21 21:11:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:11:03,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:03,830 INFO L225 Difference]: With dead ends: 559 [2021-05-21 21:11:03,830 INFO L226 Difference]: Without dead ends: 553 [2021-05-21 21:11:03,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:11:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-05-21 21:11:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-05-21 21:11:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-05-21 21:11:03,837 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-05-21 21:11:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:03,837 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-05-21 21:11:03,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-05-21 21:11:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:03,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:03,838 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:04,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 21:11:04,054 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:04,055 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-05-21 21:11:04,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:04,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848590094] [2021-05-21 21:11:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:04,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:04,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848590094] [2021-05-21 21:11:04,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848590094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:04,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836934875] [2021-05-21 21:11:04,152 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 [2021-05-21 21:11:04,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:11:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:04,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:11:04,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:04,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836934875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:04,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:04,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 21:11:04,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649134467] [2021-05-21 21:11:04,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:11:04,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:11:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:11:04,387 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:05,098 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-05-21 21:11:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:11:05,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:05,101 INFO L225 Difference]: With dead ends: 976 [2021-05-21 21:11:05,102 INFO L226 Difference]: Without dead ends: 940 [2021-05-21 21:11:05,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 604.2ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 21:11:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-05-21 21:11:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-05-21 21:11:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-05-21 21:11:05,111 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-05-21 21:11:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:05,111 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-05-21 21:11:05,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-05-21 21:11:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:05,111 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:05,112 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:05,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:11:05,328 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-05-21 21:11:05,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:05,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187855229] [2021-05-21 21:11:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:05,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:05,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187855229] [2021-05-21 21:11:05,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187855229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:05,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092992605] [2021-05-21 21:11:05,428 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 [2021-05-21 21:11:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:05,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:11:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:05,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092992605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:05,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:05,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-21 21:11:05,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192377355] [2021-05-21 21:11:05,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:11:05,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:11:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:11:05,671 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:06,417 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-05-21 21:11:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:11:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:06,419 INFO L225 Difference]: With dead ends: 802 [2021-05-21 21:11:06,419 INFO L226 Difference]: Without dead ends: 794 [2021-05-21 21:11:06,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 21:11:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-05-21 21:11:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-05-21 21:11:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-05-21 21:11:06,427 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-05-21 21:11:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:06,427 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-05-21 21:11:06,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-05-21 21:11:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:11:06,428 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:06,428 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:06,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 21:11:06,644 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-05-21 21:11:06,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:06,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665528209] [2021-05-21 21:11:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:06,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:06,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665528209] [2021-05-21 21:11:06,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665528209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:06,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526800917] [2021-05-21 21:11:06,722 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) [2021-05-21 21:11:06,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:06,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:06,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:11:06,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:07,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526800917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:07,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:07,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:07,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669423623] [2021-05-21 21:11:07,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:07,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:07,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:07,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:07,031 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-05-21 21:11:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:07,746 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-05-21 21:11:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:11:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-21 21:11:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:07,748 INFO L225 Difference]: With dead ends: 680 [2021-05-21 21:11:07,748 INFO L226 Difference]: Without dead ends: 638 [2021-05-21 21:11:07,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 671.6ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:11:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-21 21:11:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-05-21 21:11:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 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) [2021-05-21 21:11:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-05-21 21:11:07,755 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-05-21 21:11:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-05-21 21:11:07,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-05-21 21:11:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-05-21 21:11:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:11:07,756 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:07,757 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:07,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:07,973 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-05-21 21:11:07,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:07,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394230159] [2021-05-21 21:11:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:08,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:08,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394230159] [2021-05-21 21:11:08,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394230159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:08,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642017826] [2021-05-21 21:11:08,040 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 [2021-05-21 21:11:08,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:11:08,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:11:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:08,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642017826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:08,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:08,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-05-21 21:11:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366809412] [2021-05-21 21:11:08,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:11:08,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:11:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:11:08,289 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:08,961 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-05-21 21:11:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:11:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-21 21:11:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:08,963 INFO L225 Difference]: With dead ends: 520 [2021-05-21 21:11:08,963 INFO L226 Difference]: Without dead ends: 516 [2021-05-21 21:11:08,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 646.2ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 21:11:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-21 21:11:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-05-21 21:11:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-05-21 21:11:08,969 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-05-21 21:11:08,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:08,969 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-05-21 21:11:08,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-05-21 21:11:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:08,970 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:08,970 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:09,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:09,185 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-05-21 21:11:09,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:09,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786185406] [2021-05-21 21:11:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:09,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:09,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786185406] [2021-05-21 21:11:09,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786185406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:09,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373688408] [2021-05-21 21:11:09,253 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 [2021-05-21 21:11:09,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:09,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:11:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:09,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373688408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:09,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:09,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-21 21:11:09,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492159131] [2021-05-21 21:11:09,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:11:09,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:09,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:11:09,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:11:09,339 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-05-21 21:11:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:09,376 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-05-21 21:11:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:11:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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 31 [2021-05-21 21:11:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:09,378 INFO L225 Difference]: With dead ends: 492 [2021-05-21 21:11:09,378 INFO L226 Difference]: Without dead ends: 453 [2021-05-21 21:11:09,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:11:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-21 21:11:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-05-21 21:11:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 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) [2021-05-21 21:11:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-05-21 21:11:09,383 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-05-21 21:11:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:09,383 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-05-21 21:11:09,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-05-21 21:11:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-05-21 21:11:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:09,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:09,384 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:09,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:09,600 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:09,601 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-05-21 21:11:09,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:09,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861694529] [2021-05-21 21:11:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:09,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861694529] [2021-05-21 21:11:09,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861694529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234631062] [2021-05-21 21:11:09,740 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 [2021-05-21 21:11:09,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:11:09,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:09,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:11:09,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:10,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234631062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:10,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:10,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-05-21 21:11:10,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955766749] [2021-05-21 21:11:10,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:11:10,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:11:10,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:11:10,007 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:10,977 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-05-21 21:11:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:11:10,978 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:10,980 INFO L225 Difference]: With dead ends: 772 [2021-05-21 21:11:10,980 INFO L226 Difference]: Without dead ends: 766 [2021-05-21 21:11:10,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 839.5ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:11:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-05-21 21:11:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-05-21 21:11:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 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) [2021-05-21 21:11:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-05-21 21:11:10,986 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-05-21 21:11:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:10,986 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-05-21 21:11:10,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-05-21 21:11:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:10,987 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:10,987 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:11,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 21:11:11,203 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-05-21 21:11:11,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:11,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147565656] [2021-05-21 21:11:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:11,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:11,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147565656] [2021-05-21 21:11:11,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147565656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:11,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106274039] [2021-05-21 21:11:11,308 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 [2021-05-21 21:11:11,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:11:11,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:11,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 21:11:11,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:11,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106274039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:11,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:11,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-21 21:11:11,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070795415] [2021-05-21 21:11:11,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:11:11,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:11:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:11:11,543 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:12,623 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-05-21 21:11:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 21:11:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:12,626 INFO L225 Difference]: With dead ends: 1342 [2021-05-21 21:11:12,626 INFO L226 Difference]: Without dead ends: 1318 [2021-05-21 21:11:12,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 888.8ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:11:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-05-21 21:11:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-05-21 21:11:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-05-21 21:11:12,634 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-05-21 21:11:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:12,635 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-05-21 21:11:12,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-05-21 21:11:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:12,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:12,635 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:12,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 21:11:12,849 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-05-21 21:11:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:12,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857869382] [2021-05-21 21:11:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:12,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:12,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857869382] [2021-05-21 21:11:12,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857869382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:12,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837459567] [2021-05-21 21:11:12,940 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 [2021-05-21 21:11:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 21:11:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:13,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837459567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:13,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:13,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-21 21:11:13,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866760187] [2021-05-21 21:11:13,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:13,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:13,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:13,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:13,209 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-05-21 21:11:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:14,277 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-05-21 21:11:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:11:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 31 [2021-05-21 21:11:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:14,280 INFO L225 Difference]: With dead ends: 1094 [2021-05-21 21:11:14,280 INFO L226 Difference]: Without dead ends: 1090 [2021-05-21 21:11:14,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 893.2ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 21:11:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-05-21 21:11:14,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-05-21 21:11:14,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-05-21 21:11:14,287 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-05-21 21:11:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:14,287 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-05-21 21:11:14,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-05-21 21:11:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-05-21 21:11:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:14,288 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:14,288 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:14,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:11:14,501 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-05-21 21:11:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630992983] [2021-05-21 21:11:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:14,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630992983] [2021-05-21 21:11:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630992983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913242758] [2021-05-21 21:11:14,621 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) [2021-05-21 21:11:14,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:14,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:11:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913242758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:14,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:14,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-05-21 21:11:14,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809414034] [2021-05-21 21:11:14,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:11:14,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:11:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:11:14,879 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:15,698 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-05-21 21:11:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 21:11:15,699 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:15,703 INFO L225 Difference]: With dead ends: 1727 [2021-05-21 21:11:15,703 INFO L226 Difference]: Without dead ends: 1631 [2021-05-21 21:11:15,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 21:11:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-05-21 21:11:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-05-21 21:11:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 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) [2021-05-21 21:11:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-05-21 21:11:15,713 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-05-21 21:11:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:15,713 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-05-21 21:11:15,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-05-21 21:11:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:15,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:15,714 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:15,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:11:15,929 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:15,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-05-21 21:11:15,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:15,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750872991] [2021-05-21 21:11:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:15,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:15,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750872991] [2021-05-21 21:11:15,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750872991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:15,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191670223] [2021-05-21 21:11:15,993 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 [2021-05-21 21:11:16,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:11:16,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:16,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:16,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:16,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191670223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:16,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:16,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-05-21 21:11:16,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535318796] [2021-05-21 21:11:16,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:11:16,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:16,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:11:16,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:11:16,257 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-05-21 21:11:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:17,266 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-05-21 21:11:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 21:11:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 31 [2021-05-21 21:11:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:17,270 INFO L225 Difference]: With dead ends: 1314 [2021-05-21 21:11:17,270 INFO L226 Difference]: Without dead ends: 1310 [2021-05-21 21:11:17,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 935.8ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 21:11:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-05-21 21:11:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-05-21 21:11:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-05-21 21:11:17,280 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-05-21 21:11:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:17,281 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-05-21 21:11:17,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-05-21 21:11:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-05-21 21:11:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:11:17,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:17,282 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:17,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:17,499 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:17,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:17,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-05-21 21:11:17,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:17,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139516657] [2021-05-21 21:11:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:17,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:17,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139516657] [2021-05-21 21:11:17,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139516657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:17,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84936562] [2021-05-21 21:11:17,602 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 [2021-05-21 21:11:17,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:17,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 21:11:17,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:17,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84936562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:17,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:17,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-21 21:11:17,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768619358] [2021-05-21 21:11:17,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:11:17,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:11:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:11:17,869 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:18,855 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-05-21 21:11:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 21:11:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:18,858 INFO L225 Difference]: With dead ends: 1171 [2021-05-21 21:11:18,858 INFO L226 Difference]: Without dead ends: 1099 [2021-05-21 21:11:18,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 933.6ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 21:11:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-05-21 21:11:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-05-21 21:11:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-05-21 21:11:18,867 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-05-21 21:11:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:18,867 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-05-21 21:11:18,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-05-21 21:11:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:11:18,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:18,868 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:19,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:19,076 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-05-21 21:11:19,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:19,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904585974] [2021-05-21 21:11:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:19,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:19,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904585974] [2021-05-21 21:11:19,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904585974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:19,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644627154] [2021-05-21 21:11:19,131 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 [2021-05-21 21:11:19,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:11:19,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:19,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:11:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:19,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644627154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:19,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:19,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-05-21 21:11:19,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757124854] [2021-05-21 21:11:19,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:11:19,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:19,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:11:19,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:11:19,380 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:20,317 INFO L93 Difference]: Finished difference Result 940 states and 2022 transitions. [2021-05-21 21:11:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 21:11:20,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:20,319 INFO L225 Difference]: With dead ends: 940 [2021-05-21 21:11:20,319 INFO L226 Difference]: Without dead ends: 936 [2021-05-21 21:11:20,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=1104, Invalid=3452, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 21:11:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-05-21 21:11:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 572. [2021-05-21 21:11:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-05-21 21:11:20,332 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-05-21 21:11:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:20,332 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-05-21 21:11:20,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-05-21 21:11:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:11:20,333 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:20,333 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:20,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 21:11:20,544 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-05-21 21:11:20,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:20,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692224922] [2021-05-21 21:11:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:20,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:20,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692224922] [2021-05-21 21:11:20,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692224922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:20,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876593815] [2021-05-21 21:11:20,603 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 [2021-05-21 21:11:20,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:11:20,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:20,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:11:20,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:20,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876593815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:20,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:20,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-05-21 21:11:20,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936950694] [2021-05-21 21:11:20,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:11:20,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:11:20,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:11:20,742 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:20,859 INFO L93 Difference]: Finished difference Result 950 states and 2099 transitions. [2021-05-21 21:11:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:11:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:11:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:20,862 INFO L225 Difference]: With dead ends: 950 [2021-05-21 21:11:20,862 INFO L226 Difference]: Without dead ends: 896 [2021-05-21 21:11:20,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:11:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-05-21 21:11:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-05-21 21:11:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.336099585062241) internal successors, (1689), 723 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) [2021-05-21 21:11:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-05-21 21:11:20,870 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-05-21 21:11:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:20,870 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-05-21 21:11:20,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-05-21 21:11:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:11:20,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:20,872 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:21,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:21,086 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:21,087 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 25 times [2021-05-21 21:11:21,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:21,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31477236] [2021-05-21 21:11:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:21,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:21,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31477236] [2021-05-21 21:11:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31477236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691756021] [2021-05-21 21:11:21,194 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 [2021-05-21 21:11:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:11:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:21,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691756021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:21,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:21,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-21 21:11:21,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484409892] [2021-05-21 21:11:21,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:11:21,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:21,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:11:21,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:11:21,514 INFO L87 Difference]: Start difference. First operand 724 states and 1689 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:23,104 INFO L93 Difference]: Finished difference Result 2174 states and 4585 transitions. [2021-05-21 21:11:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 21:11:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:23,110 INFO L225 Difference]: With dead ends: 2174 [2021-05-21 21:11:23,110 INFO L226 Difference]: Without dead ends: 2150 [2021-05-21 21:11:23,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1223.5ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 21:11:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-05-21 21:11:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 800. [2021-05-21 21:11:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3617021276595747) internal successors, (1887), 799 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1887 transitions. [2021-05-21 21:11:23,125 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1887 transitions. Word has length 35 [2021-05-21 21:11:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:23,125 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1887 transitions. [2021-05-21 21:11:23,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1887 transitions. [2021-05-21 21:11:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:11:23,126 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:23,127 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:23,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 21:11:23,343 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:23,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 26 times [2021-05-21 21:11:23,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:23,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064914105] [2021-05-21 21:11:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:23,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:23,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064914105] [2021-05-21 21:11:23,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064914105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:23,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999008548] [2021-05-21 21:11:23,434 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 [2021-05-21 21:11:23,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:11:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:23,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999008548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:23,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:23,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-05-21 21:11:23,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783441170] [2021-05-21 21:11:23,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:23,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:23,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:23,717 INFO L87 Difference]: Start difference. First operand 800 states and 1887 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:25,082 INFO L93 Difference]: Finished difference Result 1787 states and 3872 transitions. [2021-05-21 21:11:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 21:11:25,083 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:25,087 INFO L225 Difference]: With dead ends: 1787 [2021-05-21 21:11:25,087 INFO L226 Difference]: Without dead ends: 1783 [2021-05-21 21:11:25,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1068.9ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 21:11:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-05-21 21:11:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 712. [2021-05-21 21:11:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-05-21 21:11:25,098 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-05-21 21:11:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:25,098 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-05-21 21:11:25,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-05-21 21:11:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:11:25,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:25,099 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:25,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:25,313 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 27 times [2021-05-21 21:11:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:25,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539767548] [2021-05-21 21:11:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:25,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:25,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539767548] [2021-05-21 21:11:25,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539767548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:25,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681309132] [2021-05-21 21:11:25,412 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 [2021-05-21 21:11:25,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:11:25,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:11:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:25,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681309132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:25,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:25,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:11:25,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645385814] [2021-05-21 21:11:25,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:11:25,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:25,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:11:25,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:11:25,705 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:27,126 INFO L93 Difference]: Finished difference Result 2749 states and 5737 transitions. [2021-05-21 21:11:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 21:11:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:27,132 INFO L225 Difference]: With dead ends: 2749 [2021-05-21 21:11:27,133 INFO L226 Difference]: Without dead ends: 2653 [2021-05-21 21:11:27,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1168.3ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 21:11:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-05-21 21:11:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 712. [2021-05-21 21:11:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-05-21 21:11:27,150 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-05-21 21:11:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:27,150 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-05-21 21:11:27,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-05-21 21:11:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:11:27,151 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:27,151 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:27,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 21:11:27,363 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 28 times [2021-05-21 21:11:27,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:27,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274612164] [2021-05-21 21:11:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:27,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:27,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274612164] [2021-05-21 21:11:27,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274612164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:27,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362644649] [2021-05-21 21:11:27,469 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) [2021-05-21 21:11:27,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:27,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:27,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:27,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362644649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:27,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:27,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-21 21:11:27,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389062005] [2021-05-21 21:11:27,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 21:11:27,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:27,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 21:11:27,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:11:27,745 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:28,934 INFO L93 Difference]: Finished difference Result 3359 states and 7152 transitions. [2021-05-21 21:11:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 21:11:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:28,938 INFO L225 Difference]: With dead ends: 3359 [2021-05-21 21:11:28,938 INFO L226 Difference]: Without dead ends: 3170 [2021-05-21 21:11:28,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1072.0ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 21:11:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-05-21 21:11:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 740. [2021-05-21 21:11:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.266576454668471) internal successors, (1675), 739 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1675 transitions. [2021-05-21 21:11:28,955 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1675 transitions. Word has length 35 [2021-05-21 21:11:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:28,956 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1675 transitions. [2021-05-21 21:11:28,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1675 transitions. [2021-05-21 21:11:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:11:28,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:28,957 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:29,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 21:11:29,172 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:29,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1190311629, now seen corresponding path program 29 times [2021-05-21 21:11:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:29,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917144760] [2021-05-21 21:11:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:29,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:29,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917144760] [2021-05-21 21:11:29,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917144760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:29,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511563325] [2021-05-21 21:11:29,238 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 [2021-05-21 21:11:29,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:11:29,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:29,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:11:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:29,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511563325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:29,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:29,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-05-21 21:11:29,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127717871] [2021-05-21 21:11:29,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:11:29,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:29,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:11:29,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:11:29,527 INFO L87 Difference]: Start difference. First operand 740 states and 1675 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:31,067 INFO L93 Difference]: Finished difference Result 2167 states and 4649 transitions. [2021-05-21 21:11:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 21:11:31,067 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:31,070 INFO L225 Difference]: With dead ends: 2167 [2021-05-21 21:11:31,070 INFO L226 Difference]: Without dead ends: 2163 [2021-05-21 21:11:31,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1386.1ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 21:11:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-05-21 21:11:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 800. [2021-05-21 21:11:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3204005006257824) internal successors, (1854), 799 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1854 transitions. [2021-05-21 21:11:31,087 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1854 transitions. Word has length 35 [2021-05-21 21:11:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:31,088 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1854 transitions. [2021-05-21 21:11:31,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1854 transitions. [2021-05-21 21:11:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:11:31,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:31,089 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:31,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 21:11:31,301 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 30 times [2021-05-21 21:11:31,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:31,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356702206] [2021-05-21 21:11:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:31,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:31,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356702206] [2021-05-21 21:11:31,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356702206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:31,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495780078] [2021-05-21 21:11:31,405 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 [2021-05-21 21:11:31,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:11:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:31,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:11:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:31,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495780078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:31,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:31,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-21 21:11:31,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295045368] [2021-05-21 21:11:31,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:11:31,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:11:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:11:31,757 INFO L87 Difference]: Start difference. First operand 800 states and 1854 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:33,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:33,144 INFO L93 Difference]: Finished difference Result 1623 states and 3425 transitions. [2021-05-21 21:11:33,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 21:11:33,144 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:33,145 INFO L225 Difference]: With dead ends: 1623 [2021-05-21 21:11:33,145 INFO L226 Difference]: Without dead ends: 1515 [2021-05-21 21:11:33,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 1279.5ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 21:11:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-05-21 21:11:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 807. [2021-05-21 21:11:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3089330024813894) internal successors, (1861), 806 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1861 transitions. [2021-05-21 21:11:33,155 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1861 transitions. Word has length 37 [2021-05-21 21:11:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:33,156 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1861 transitions. [2021-05-21 21:11:33,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1861 transitions. [2021-05-21 21:11:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:11:33,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:33,157 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:33,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:33,372 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:33,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 31 times [2021-05-21 21:11:33,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:33,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685091426] [2021-05-21 21:11:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:33,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:33,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685091426] [2021-05-21 21:11:33,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685091426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:33,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481475021] [2021-05-21 21:11:33,439 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 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 [2021-05-21 21:11:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:33,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:11:33,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:33,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481475021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:33,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:33,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-05-21 21:11:33,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713675235] [2021-05-21 21:11:33,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:11:33,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:11:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:11:33,727 INFO L87 Difference]: Start difference. First operand 807 states and 1861 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:34,988 INFO L93 Difference]: Finished difference Result 1315 states and 2845 transitions. [2021-05-21 21:11:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 21:11:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:34,990 INFO L225 Difference]: With dead ends: 1315 [2021-05-21 21:11:34,990 INFO L226 Difference]: Without dead ends: 1311 [2021-05-21 21:11:34,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1236.6ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 21:11:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-05-21 21:11:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 787. [2021-05-21 21:11:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.3155216284987277) internal successors, (1820), 786 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1820 transitions. [2021-05-21 21:11:35,000 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1820 transitions. Word has length 37 [2021-05-21 21:11:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:35,000 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1820 transitions. [2021-05-21 21:11:35,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1820 transitions. [2021-05-21 21:11:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:11:35,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:35,001 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:35,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-21 21:11:35,217 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1424137007, now seen corresponding path program 32 times [2021-05-21 21:11:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:35,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578139352] [2021-05-21 21:11:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:11:35,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:35,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578139352] [2021-05-21 21:11:35,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578139352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:35,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350796811] [2021-05-21 21:11:35,285 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 [2021-05-21 21:11:35,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:35,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:11:35,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:35,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350796811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:35,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:35,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-05-21 21:11:35,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963920672] [2021-05-21 21:11:35,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:11:35,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:11:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:11:35,593 INFO L87 Difference]: Start difference. First operand 787 states and 1820 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:36,647 INFO L93 Difference]: Finished difference Result 2091 states and 4512 transitions. [2021-05-21 21:11:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 21:11:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:36,650 INFO L225 Difference]: With dead ends: 2091 [2021-05-21 21:11:36,650 INFO L226 Difference]: Without dead ends: 2082 [2021-05-21 21:11:36,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 21:11:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-05-21 21:11:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1285. [2021-05-21 21:11:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 2.367601246105919) internal successors, (3040), 1284 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3040 transitions. [2021-05-21 21:11:36,672 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3040 transitions. Word has length 37 [2021-05-21 21:11:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:36,672 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 3040 transitions. [2021-05-21 21:11:36,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3040 transitions. [2021-05-21 21:11:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:11:36,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:36,674 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:36,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 21:11:36,886 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:36,887 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-05-21 21:11:36,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:36,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034222386] [2021-05-21 21:11:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:36,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:36,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034222386] [2021-05-21 21:11:36,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034222386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:36,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469575490] [2021-05-21 21:11:36,962 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 [2021-05-21 21:11:36,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:11:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:36,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 21:11:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:37,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469575490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:37,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:37,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-05-21 21:11:37,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424480478] [2021-05-21 21:11:37,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:11:37,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:37,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:11:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:11:37,141 INFO L87 Difference]: Start difference. First operand 1285 states and 3040 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-05-21 21:11:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:37,255 INFO L93 Difference]: Finished difference Result 1931 states and 4496 transitions. [2021-05-21 21:11:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:11:37,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 39 [2021-05-21 21:11:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:37,258 INFO L225 Difference]: With dead ends: 1931 [2021-05-21 21:11:37,258 INFO L226 Difference]: Without dead ends: 1874 [2021-05-21 21:11:37,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:11:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-05-21 21:11:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1608. [2021-05-21 21:11:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.40261356565028) internal successors, (3861), 1607 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 3861 transitions. [2021-05-21 21:11:37,277 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 3861 transitions. Word has length 39 [2021-05-21 21:11:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:37,277 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 3861 transitions. [2021-05-21 21:11:37,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-05-21 21:11:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 3861 transitions. [2021-05-21 21:11:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:11:37,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:37,279 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:37,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-21 21:11:37,495 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 34 times [2021-05-21 21:11:37,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:37,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27827703] [2021-05-21 21:11:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:37,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:37,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27827703] [2021-05-21 21:11:37,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27827703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:37,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631822543] [2021-05-21 21:11:37,600 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 [2021-05-21 21:11:37,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:37,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:37,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 21:11:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631822543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:37,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:37,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-05-21 21:11:37,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748398010] [2021-05-21 21:11:37,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 21:11:37,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:37,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 21:11:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:11:37,977 INFO L87 Difference]: Start difference. First operand 1608 states and 3861 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:39,998 INFO L93 Difference]: Finished difference Result 3088 states and 6943 transitions. [2021-05-21 21:11:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 21:11:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:40,002 INFO L225 Difference]: With dead ends: 3088 [2021-05-21 21:11:40,002 INFO L226 Difference]: Without dead ends: 3084 [2021-05-21 21:11:40,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1497.0ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 21:11:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-05-21 21:11:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1766. [2021-05-21 21:11:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.424929178470255) internal successors, (4280), 1765 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-05-21 21:11:40,026 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-05-21 21:11:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:40,026 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-05-21 21:11:40,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-05-21 21:11:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:11:40,028 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:40,028 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:40,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-21 21:11:40,244 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 35 times [2021-05-21 21:11:40,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:40,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656245513] [2021-05-21 21:11:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:40,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:40,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656245513] [2021-05-21 21:11:40,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656245513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:40,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430382686] [2021-05-21 21:11:40,358 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 [2021-05-21 21:11:40,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 21:11:40,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 21:11:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:40,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430382686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:40,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:40,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-21 21:11:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472026747] [2021-05-21 21:11:40,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:11:40,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:40,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:11:40,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:11:40,702 INFO L87 Difference]: Start difference. First operand 1766 states and 4280 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:43,063 INFO L93 Difference]: Finished difference Result 4762 states and 10494 transitions. [2021-05-21 21:11:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-21 21:11:43,064 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:11:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:43,068 INFO L225 Difference]: With dead ends: 4762 [2021-05-21 21:11:43,068 INFO L226 Difference]: Without dead ends: 4714 [2021-05-21 21:11:43,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3935 ImplicationChecksByTransitivity, 1761.5ms TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2021-05-21 21:11:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-05-21 21:11:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 1566. [2021-05-21 21:11:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.4255591054313097) internal successors, (3796), 1565 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-05-21 21:11:43,094 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-05-21 21:11:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:43,094 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-05-21 21:11:43,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-05-21 21:11:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:11:43,096 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:43,096 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:43,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:43,296 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:43,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:43,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 36 times [2021-05-21 21:11:43,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:43,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267625551] [2021-05-21 21:11:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:43,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:43,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267625551] [2021-05-21 21:11:43,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267625551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:43,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020798152] [2021-05-21 21:11:43,423 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 [2021-05-21 21:11:43,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:11:43,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 21:11:43,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:43,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020798152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:43,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:43,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-21 21:11:43,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336081337] [2021-05-21 21:11:43,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:11:43,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:43,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:11:43,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:11:43,782 INFO L87 Difference]: Start difference. First operand 1566 states and 3796 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:45,468 INFO L93 Difference]: Finished difference Result 5523 states and 12031 transitions. [2021-05-21 21:11:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 21:11:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:11:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:45,473 INFO L225 Difference]: With dead ends: 5523 [2021-05-21 21:11:45,473 INFO L226 Difference]: Without dead ends: 5397 [2021-05-21 21:11:45,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1416.7ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 21:11:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-05-21 21:11:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-05-21 21:11:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.4212523719165087) internal successors, (3828), 1581 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-05-21 21:11:45,497 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-05-21 21:11:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:45,497 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-05-21 21:11:45,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-05-21 21:11:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:11:45,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:45,499 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:45,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-21 21:11:45,713 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:45,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:45,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 37 times [2021-05-21 21:11:45,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:45,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486314247] [2021-05-21 21:11:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:45,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:45,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486314247] [2021-05-21 21:11:45,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486314247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:45,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877869167] [2021-05-21 21:11:45,854 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) [2021-05-21 21:11:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:45,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:45,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:46,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877869167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:46,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:46,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-21 21:11:46,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129951990] [2021-05-21 21:11:46,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:11:46,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:46,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:11:46,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:11:46,207 INFO L87 Difference]: Start difference. First operand 1582 states and 3828 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:47,782 INFO L93 Difference]: Finished difference Result 5929 states and 13118 transitions. [2021-05-21 21:11:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 21:11:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:11:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:47,787 INFO L225 Difference]: With dead ends: 5929 [2021-05-21 21:11:47,787 INFO L226 Difference]: Without dead ends: 5656 [2021-05-21 21:11:47,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1442.0ms TimeCoverageRelationStatistics Valid=1779, Invalid=7533, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 21:11:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-05-21 21:11:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 1758. [2021-05-21 21:11:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.363118952760387) internal successors, (4152), 1757 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-05-21 21:11:47,816 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-05-21 21:11:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:47,816 INFO L482 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-05-21 21:11:47,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-05-21 21:11:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:11:47,818 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:47,818 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:48,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-05-21 21:11:48,018 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 38 times [2021-05-21 21:11:48,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:48,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389496443] [2021-05-21 21:11:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:48,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:48,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389496443] [2021-05-21 21:11:48,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389496443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:48,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347016497] [2021-05-21 21:11:48,106 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 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 [2021-05-21 21:11:48,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:48,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:11:48,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:48,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347016497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:48,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:48,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-05-21 21:11:48,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735605609] [2021-05-21 21:11:48,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:11:48,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:11:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:11:48,455 INFO L87 Difference]: Start difference. First operand 1758 states and 4152 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:50,698 INFO L93 Difference]: Finished difference Result 3958 states and 8761 transitions. [2021-05-21 21:11:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-21 21:11:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:50,702 INFO L225 Difference]: With dead ends: 3958 [2021-05-21 21:11:50,702 INFO L226 Difference]: Without dead ends: 3954 [2021-05-21 21:11:50,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2056.0ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:11:50,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-05-21 21:11:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-05-21 21:11:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.3892799133730374) internal successors, (4413), 1847 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:50,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-05-21 21:11:50,726 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-05-21 21:11:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:50,726 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-05-21 21:11:50,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-05-21 21:11:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:11:50,728 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:50,728 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:50,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:50,944 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 39 times [2021-05-21 21:11:50,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:50,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255254461] [2021-05-21 21:11:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:51,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255254461] [2021-05-21 21:11:51,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255254461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623628425] [2021-05-21 21:11:51,089 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 [2021-05-21 21:11:51,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:11:51,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 21:11:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:51,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623628425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:51,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:51,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-21 21:11:51,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809708768] [2021-05-21 21:11:51,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:11:51,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:11:51,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:11:51,496 INFO L87 Difference]: Start difference. First operand 1848 states and 4413 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:53,339 INFO L93 Difference]: Finished difference Result 3268 states and 7276 transitions. [2021-05-21 21:11:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-21 21:11:53,339 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-21 21:11:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:53,341 INFO L225 Difference]: With dead ends: 3268 [2021-05-21 21:11:53,341 INFO L226 Difference]: Without dead ends: 3049 [2021-05-21 21:11:53,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 1745.4ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-05-21 21:11:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-05-21 21:11:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1787. [2021-05-21 21:11:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.379619260918253) internal successors, (4250), 1786 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-05-21 21:11:53,363 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-05-21 21:11:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:53,363 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-05-21 21:11:53,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-05-21 21:11:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:11:53,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:53,365 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:53,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 21:11:53,581 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 40 times [2021-05-21 21:11:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:53,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927998343] [2021-05-21 21:11:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:53,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:53,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927998343] [2021-05-21 21:11:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927998343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:53,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893632344] [2021-05-21 21:11:53,652 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:11:53,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:53,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:53,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:53,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:53,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893632344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:53,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:53,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-05-21 21:11:53,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698218531] [2021-05-21 21:11:53,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:11:53,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:11:53,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:11:53,989 INFO L87 Difference]: Start difference. First operand 1787 states and 4250 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:55,823 INFO L93 Difference]: Finished difference Result 2437 states and 5514 transitions. [2021-05-21 21:11:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-21 21:11:55,824 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-21 21:11:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:55,826 INFO L225 Difference]: With dead ends: 2437 [2021-05-21 21:11:55,826 INFO L226 Difference]: Without dead ends: 2433 [2021-05-21 21:11:55,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1719.3ms TimeCoverageRelationStatistics Valid=2626, Invalid=8504, Unknown=0, NotChecked=0, Total=11130 [2021-05-21 21:11:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-05-21 21:11:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1763. [2021-05-21 21:11:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.38422247446084) internal successors, (4201), 1762 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-05-21 21:11:55,843 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-05-21 21:11:55,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:55,844 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-05-21 21:11:55,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:55,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-05-21 21:11:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:11:55,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:55,845 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:56,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:56,065 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 41 times [2021-05-21 21:11:56,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:56,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902971822] [2021-05-21 21:11:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:56,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902971822] [2021-05-21 21:11:56,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902971822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565429232] [2021-05-21 21:11:56,139 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 [2021-05-21 21:11:56,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:11:56,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 21:11:56,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:56,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565429232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:56,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:56,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-21 21:11:56,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490015482] [2021-05-21 21:11:56,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:11:56,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:56,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:11:56,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:11:56,230 INFO L87 Difference]: Start difference. First operand 1763 states and 4201 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-05-21 21:11:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:56,314 INFO L93 Difference]: Finished difference Result 2486 states and 5827 transitions. [2021-05-21 21:11:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:11:56,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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 43 [2021-05-21 21:11:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:56,317 INFO L225 Difference]: With dead ends: 2486 [2021-05-21 21:11:56,317 INFO L226 Difference]: Without dead ends: 2429 [2021-05-21 21:11:56,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:11:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-05-21 21:11:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2196. [2021-05-21 21:11:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.4314350797266515) internal successors, (5337), 2195 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5337 transitions. [2021-05-21 21:11:56,338 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5337 transitions. Word has length 43 [2021-05-21 21:11:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:56,339 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 5337 transitions. [2021-05-21 21:11:56,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-05-21 21:11:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5337 transitions. [2021-05-21 21:11:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:11:56,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:56,341 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:56,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 21:11:56,545 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 42 times [2021-05-21 21:11:56,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:56,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497717738] [2021-05-21 21:11:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:56,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497717738] [2021-05-21 21:11:56,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497717738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989985141] [2021-05-21 21:11:56,677 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 [2021-05-21 21:11:56,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 21:11:56,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 21:11:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:57,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989985141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:57,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:57,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-05-21 21:11:57,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839742811] [2021-05-21 21:11:57,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:11:57,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:57,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:11:57,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:11:57,145 INFO L87 Difference]: Start difference. First operand 2196 states and 5337 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:59,883 INFO L93 Difference]: Finished difference Result 5082 states and 11297 transitions. [2021-05-21 21:11:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-21 21:11:59,883 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:11:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:59,887 INFO L225 Difference]: With dead ends: 5082 [2021-05-21 21:11:59,887 INFO L226 Difference]: Without dead ends: 5049 [2021-05-21 21:11:59,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 1982.0ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-05-21 21:11:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2021-05-21 21:11:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 2469. [2021-05-21 21:11:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 2.4315235008103726) internal successors, (6001), 2468 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 6001 transitions. [2021-05-21 21:11:59,916 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 6001 transitions. Word has length 43 [2021-05-21 21:11:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:59,916 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 6001 transitions. [2021-05-21 21:11:59,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 6001 transitions. [2021-05-21 21:11:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:11:59,918 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:59,918 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:00,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 21:12:00,128 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 43 times [2021-05-21 21:12:00,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:00,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159472592] [2021-05-21 21:12:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:00,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:00,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159472592] [2021-05-21 21:12:00,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159472592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:00,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965644846] [2021-05-21 21:12:00,240 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 [2021-05-21 21:12:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:00,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 21:12:00,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:00,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965644846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:00,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:00,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-05-21 21:12:00,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738268146] [2021-05-21 21:12:00,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:12:00,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:00,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:12:00,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:12:00,640 INFO L87 Difference]: Start difference. First operand 2469 states and 6001 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:02,932 INFO L93 Difference]: Finished difference Result 4063 states and 9266 transitions. [2021-05-21 21:12:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 21:12:02,932 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:12:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:02,936 INFO L225 Difference]: With dead ends: 4063 [2021-05-21 21:12:02,936 INFO L226 Difference]: Without dead ends: 4059 [2021-05-21 21:12:02,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 1670.9ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 21:12:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-05-21 21:12:02,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 2259. [2021-05-21 21:12:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.425597874224978) internal successors, (5477), 2258 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 5477 transitions. [2021-05-21 21:12:02,968 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 5477 transitions. Word has length 43 [2021-05-21 21:12:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:02,968 INFO L482 AbstractCegarLoop]: Abstraction has 2259 states and 5477 transitions. [2021-05-21 21:12:02,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 5477 transitions. [2021-05-21 21:12:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:12:02,971 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:02,971 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:03,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:03,185 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 44 times [2021-05-21 21:12:03,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:03,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077297914] [2021-05-21 21:12:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:03,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:03,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077297914] [2021-05-21 21:12:03,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077297914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:03,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287874581] [2021-05-21 21:12:03,358 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 [2021-05-21 21:12:03,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:03,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:12:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:03,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287874581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:03,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:03,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-05-21 21:12:03,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730898024] [2021-05-21 21:12:03,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:12:03,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:12:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:12:03,782 INFO L87 Difference]: Start difference. First operand 2259 states and 5477 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:07,122 INFO L93 Difference]: Finished difference Result 5894 states and 13012 transitions. [2021-05-21 21:12:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-21 21:12:07,123 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:07,128 INFO L225 Difference]: With dead ends: 5894 [2021-05-21 21:12:07,128 INFO L226 Difference]: Without dead ends: 5846 [2021-05-21 21:12:07,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 2328.2ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-05-21 21:12:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-05-21 21:12:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 2347. [2021-05-21 21:12:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 2.411764705882353) internal successors, (5658), 2346 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 5658 transitions. [2021-05-21 21:12:07,160 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 5658 transitions. Word has length 43 [2021-05-21 21:12:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:07,160 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 5658 transitions. [2021-05-21 21:12:07,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 5658 transitions. [2021-05-21 21:12:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:12:07,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:07,163 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:07,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 21:12:07,363 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:07,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 45 times [2021-05-21 21:12:07,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:07,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118738024] [2021-05-21 21:12:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:07,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:07,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118738024] [2021-05-21 21:12:07,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118738024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:07,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806334905] [2021-05-21 21:12:07,503 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 [2021-05-21 21:12:07,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 21:12:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:07,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:12:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:07,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806334905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:07,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:07,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-21 21:12:07,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085039929] [2021-05-21 21:12:07,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:12:07,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:07,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:12:07,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:12:07,912 INFO L87 Difference]: Start difference. First operand 2347 states and 5658 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:10,516 INFO L93 Difference]: Finished difference Result 7652 states and 16783 transitions. [2021-05-21 21:12:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-21 21:12:10,517 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:10,524 INFO L225 Difference]: With dead ends: 7652 [2021-05-21 21:12:10,524 INFO L226 Difference]: Without dead ends: 7478 [2021-05-21 21:12:10,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5177 ImplicationChecksByTransitivity, 2103.5ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-05-21 21:12:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-05-21 21:12:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 2225. [2021-05-21 21:12:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 2.428956834532374) internal successors, (5402), 2224 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 5402 transitions. [2021-05-21 21:12:10,561 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 5402 transitions. Word has length 43 [2021-05-21 21:12:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:10,561 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 5402 transitions. [2021-05-21 21:12:10,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 5402 transitions. [2021-05-21 21:12:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:12:10,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:10,563 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:10,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:10,764 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 46 times [2021-05-21 21:12:10,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:10,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179979169] [2021-05-21 21:12:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:10,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:10,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179979169] [2021-05-21 21:12:10,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179979169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:10,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262997163] [2021-05-21 21:12:10,918 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 [2021-05-21 21:12:10,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:10,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 21:12:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:11,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262997163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:11,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:11,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-21 21:12:11,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336213653] [2021-05-21 21:12:11,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:12:11,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:11,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:12:11,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:12:11,295 INFO L87 Difference]: Start difference. First operand 2225 states and 5402 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:13,511 INFO L93 Difference]: Finished difference Result 8464 states and 18466 transitions. [2021-05-21 21:12:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-21 21:12:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:13,519 INFO L225 Difference]: With dead ends: 8464 [2021-05-21 21:12:13,519 INFO L226 Difference]: Without dead ends: 8230 [2021-05-21 21:12:13,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 1821.8ms TimeCoverageRelationStatistics Valid=2344, Invalid=10996, Unknown=0, NotChecked=0, Total=13340 [2021-05-21 21:12:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-05-21 21:12:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 2241. [2021-05-21 21:12:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.4258928571428573) internal successors, (5434), 2240 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 5434 transitions. [2021-05-21 21:12:13,561 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 5434 transitions. Word has length 43 [2021-05-21 21:12:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:13,561 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 5434 transitions. [2021-05-21 21:12:13,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 5434 transitions. [2021-05-21 21:12:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:12:13,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:13,563 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:13,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-21 21:12:13,773 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 47 times [2021-05-21 21:12:13,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:13,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601408379] [2021-05-21 21:12:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:13,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:13,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601408379] [2021-05-21 21:12:13,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601408379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:13,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201663040] [2021-05-21 21:12:13,920 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 [2021-05-21 21:12:13,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:12:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 21:12:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:14,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201663040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:14,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:14,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:12:14,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804952618] [2021-05-21 21:12:14,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:12:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:12:14,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:12:14,319 INFO L87 Difference]: Start difference. First operand 2241 states and 5434 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:16,732 INFO L93 Difference]: Finished difference Result 7868 states and 17355 transitions. [2021-05-21 21:12:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-21 21:12:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:16,739 INFO L225 Difference]: With dead ends: 7868 [2021-05-21 21:12:16,739 INFO L226 Difference]: Without dead ends: 7508 [2021-05-21 21:12:16,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 2184.2ms TimeCoverageRelationStatistics Valid=3415, Invalid=13615, Unknown=0, NotChecked=0, Total=17030 [2021-05-21 21:12:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-05-21 21:12:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 2254. [2021-05-21 21:12:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 2.361739902352419) internal successors, (5321), 2253 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5321 transitions. [2021-05-21 21:12:16,782 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5321 transitions. Word has length 43 [2021-05-21 21:12:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:16,782 INFO L482 AbstractCegarLoop]: Abstraction has 2254 states and 5321 transitions. [2021-05-21 21:12:16,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5321 transitions. [2021-05-21 21:12:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:12:16,784 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:16,785 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:16,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:16,992 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 48 times [2021-05-21 21:12:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:16,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669833994] [2021-05-21 21:12:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:17,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:17,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669833994] [2021-05-21 21:12:17,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669833994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:17,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065593021] [2021-05-21 21:12:17,077 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 [2021-05-21 21:12:17,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:12:17,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:17,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:12:17,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:17,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065593021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:17,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:17,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-05-21 21:12:17,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715742780] [2021-05-21 21:12:17,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:12:17,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:12:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:12:17,440 INFO L87 Difference]: Start difference. First operand 2254 states and 5321 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:20,786 INFO L93 Difference]: Finished difference Result 5015 states and 11067 transitions. [2021-05-21 21:12:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-21 21:12:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:12:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:20,790 INFO L225 Difference]: With dead ends: 5015 [2021-05-21 21:12:20,790 INFO L226 Difference]: Without dead ends: 5011 [2021-05-21 21:12:20,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 2984.9ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-05-21 21:12:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-05-21 21:12:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 2303. [2021-05-21 21:12:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.385317115551694) internal successors, (5491), 2302 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 5491 transitions. [2021-05-21 21:12:20,815 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 5491 transitions. Word has length 43 [2021-05-21 21:12:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:20,815 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 5491 transitions. [2021-05-21 21:12:20,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 5491 transitions. [2021-05-21 21:12:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:12:20,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:20,817 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:21,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:21,018 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:21,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:21,018 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 49 times [2021-05-21 21:12:21,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:21,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156339731] [2021-05-21 21:12:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:21,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:21,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156339731] [2021-05-21 21:12:21,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156339731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:21,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179113677] [2021-05-21 21:12:21,156 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) [2021-05-21 21:12:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 21:12:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:21,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179113677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:21,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:21,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-05-21 21:12:21,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481928864] [2021-05-21 21:12:21,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 21:12:21,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:21,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 21:12:21,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:12:21,558 INFO L87 Difference]: Start difference. First operand 2303 states and 5491 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2021-05-21 21:12:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:24,125 INFO L93 Difference]: Finished difference Result 3620 states and 8022 transitions. [2021-05-21 21:12:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-21 21:12:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 [2021-05-21 21:12:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:24,128 INFO L225 Difference]: With dead ends: 3620 [2021-05-21 21:12:24,128 INFO L226 Difference]: Without dead ends: 3422 [2021-05-21 21:12:24,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2288.5ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-05-21 21:12:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-05-21 21:12:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2306. [2021-05-21 21:12:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3800433839479394) internal successors, (5486), 2305 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5486 transitions. [2021-05-21 21:12:24,151 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5486 transitions. Word has length 45 [2021-05-21 21:12:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:24,151 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5486 transitions. [2021-05-21 21:12:24,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2021-05-21 21:12:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5486 transitions. [2021-05-21 21:12:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:12:24,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:24,154 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:24,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:24,358 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:24,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 50 times [2021-05-21 21:12:24,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:24,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092521625] [2021-05-21 21:12:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:24,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092521625] [2021-05-21 21:12:24,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092521625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120500914] [2021-05-21 21:12:24,434 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 [2021-05-21 21:12:24,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:24,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:24,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:12:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:24,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120500914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:24,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:24,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-05-21 21:12:24,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679658176] [2021-05-21 21:12:24,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:24,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:24,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:24,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:24,805 INFO L87 Difference]: Start difference. First operand 2306 states and 5486 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:27,141 INFO L93 Difference]: Finished difference Result 3140 states and 7114 transitions. [2021-05-21 21:12:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-21 21:12:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:27,145 INFO L225 Difference]: With dead ends: 3140 [2021-05-21 21:12:27,145 INFO L226 Difference]: Without dead ends: 3136 [2021-05-21 21:12:27,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 2160.5ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-05-21 21:12:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-05-21 21:12:27,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2306. [2021-05-21 21:12:27,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3796095444685466) internal successors, (5485), 2305 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5485 transitions. [2021-05-21 21:12:27,167 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5485 transitions. Word has length 45 [2021-05-21 21:12:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:27,167 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5485 transitions. [2021-05-21 21:12:27,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5485 transitions. [2021-05-21 21:12:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:12:27,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:27,169 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:27,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:27,369 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:27,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1657156185, now seen corresponding path program 51 times [2021-05-21 21:12:27,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:27,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010032280] [2021-05-21 21:12:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:12:27,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010032280] [2021-05-21 21:12:27,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010032280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545478696] [2021-05-21 21:12:27,459 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 [2021-05-21 21:12:27,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 21:12:27,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:27,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:12:27,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:27,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545478696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:27,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:27,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-05-21 21:12:27,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909439645] [2021-05-21 21:12:27,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 21:12:27,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:27,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 21:12:27,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:12:27,886 INFO L87 Difference]: Start difference. First operand 2306 states and 5485 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 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) [2021-05-21 21:12:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:30,150 INFO L93 Difference]: Finished difference Result 6205 states and 13891 transitions. [2021-05-21 21:12:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-21 21:12:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 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 [2021-05-21 21:12:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:30,156 INFO L225 Difference]: With dead ends: 6205 [2021-05-21 21:12:30,156 INFO L226 Difference]: Without dead ends: 6205 [2021-05-21 21:12:30,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 2146.4ms TimeCoverageRelationStatistics Valid=3242, Invalid=10098, Unknown=0, NotChecked=0, Total=13340 [2021-05-21 21:12:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-05-21 21:12:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 3688. [2021-05-21 21:12:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.414429075128831) internal successors, (8902), 3687 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 8902 transitions. [2021-05-21 21:12:30,198 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 8902 transitions. Word has length 45 [2021-05-21 21:12:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:30,198 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 8902 transitions. [2021-05-21 21:12:30,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 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) [2021-05-21 21:12:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 8902 transitions. [2021-05-21 21:12:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:12:30,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:30,201 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:30,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-21 21:12:30,402 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:30,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:30,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 52 times [2021-05-21 21:12:30,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:30,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364329834] [2021-05-21 21:12:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:30,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:30,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364329834] [2021-05-21 21:12:30,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364329834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:30,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926657557] [2021-05-21 21:12:30,500 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 [2021-05-21 21:12:30,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:30,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:30,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 21:12:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:30,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926657557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:30,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:30,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-21 21:12:30,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990911877] [2021-05-21 21:12:30,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:12:30,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:30,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:12:30,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:12:30,627 INFO L87 Difference]: Start difference. First operand 3688 states and 8902 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:30,727 INFO L93 Difference]: Finished difference Result 4861 states and 11682 transitions. [2021-05-21 21:12:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:12:30,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:12:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:30,731 INFO L225 Difference]: With dead ends: 4861 [2021-05-21 21:12:30,731 INFO L226 Difference]: Without dead ends: 4798 [2021-05-21 21:12:30,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:12:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-05-21 21:12:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4433. [2021-05-21 21:12:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4432 states have (on average 2.4490072202166067) internal successors, (10854), 4432 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 10854 transitions. [2021-05-21 21:12:30,778 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 10854 transitions. Word has length 47 [2021-05-21 21:12:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:30,778 INFO L482 AbstractCegarLoop]: Abstraction has 4433 states and 10854 transitions. [2021-05-21 21:12:30,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 10854 transitions. [2021-05-21 21:12:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:12:30,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:30,782 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:30,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:30,997 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 53 times [2021-05-21 21:12:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:30,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890319971] [2021-05-21 21:12:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:31,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:31,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890319971] [2021-05-21 21:12:31,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890319971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:31,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449807179] [2021-05-21 21:12:31,227 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 [2021-05-21 21:12:31,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 21:12:31,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:31,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:12:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:31,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449807179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:31,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:31,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-05-21 21:12:31,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778698066] [2021-05-21 21:12:31,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-21 21:12:31,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:31,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-21 21:12:31,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 21:12:31,788 INFO L87 Difference]: Start difference. First operand 4433 states and 10854 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:34,663 INFO L93 Difference]: Finished difference Result 5913 states and 13861 transitions. [2021-05-21 21:12:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 21:12:34,663 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:34,668 INFO L225 Difference]: With dead ends: 5913 [2021-05-21 21:12:34,669 INFO L226 Difference]: Without dead ends: 5907 [2021-05-21 21:12:34,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2124.7ms TimeCoverageRelationStatistics Valid=978, Invalid=10152, Unknown=0, NotChecked=0, Total=11130 [2021-05-21 21:12:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-05-21 21:12:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 4386. [2021-05-21 21:12:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 2.4408209806157353) internal successors, (10703), 4385 states have internal predecessors, (10703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 10703 transitions. [2021-05-21 21:12:34,732 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 10703 transitions. Word has length 47 [2021-05-21 21:12:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:34,732 INFO L482 AbstractCegarLoop]: Abstraction has 4386 states and 10703 transitions. [2021-05-21 21:12:34,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 10703 transitions. [2021-05-21 21:12:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:12:34,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:34,736 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:34,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:34,937 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 54 times [2021-05-21 21:12:34,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:34,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524483585] [2021-05-21 21:12:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:35,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524483585] [2021-05-21 21:12:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524483585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322182706] [2021-05-21 21:12:35,073 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 [2021-05-21 21:12:35,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 21:12:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-21 21:12:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:35,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322182706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:35,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:35,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-05-21 21:12:35,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059357948] [2021-05-21 21:12:35,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:12:35,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:35,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:12:35,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:12:35,535 INFO L87 Difference]: Start difference. First operand 4386 states and 10703 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:39,120 INFO L93 Difference]: Finished difference Result 8676 states and 19853 transitions. [2021-05-21 21:12:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-21 21:12:39,120 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:39,133 INFO L225 Difference]: With dead ends: 8676 [2021-05-21 21:12:39,133 INFO L226 Difference]: Without dead ends: 8652 [2021-05-21 21:12:39,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 2398.5ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-05-21 21:12:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2021-05-21 21:12:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 4780. [2021-05-21 21:12:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 2.446746181209458) internal successors, (11693), 4779 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 11693 transitions. [2021-05-21 21:12:39,188 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 11693 transitions. Word has length 47 [2021-05-21 21:12:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:39,188 INFO L482 AbstractCegarLoop]: Abstraction has 4780 states and 11693 transitions. [2021-05-21 21:12:39,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 11693 transitions. [2021-05-21 21:12:39,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:12:39,192 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:39,192 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:39,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:39,397 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 55 times [2021-05-21 21:12:39,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:39,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72466747] [2021-05-21 21:12:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:39,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:39,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72466747] [2021-05-21 21:12:39,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72466747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:39,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427047373] [2021-05-21 21:12:39,533 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) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:39,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-21 21:12:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:40,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427047373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:40,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:40,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-05-21 21:12:40,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865346295] [2021-05-21 21:12:40,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:12:40,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:40,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:12:40,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:12:40,021 INFO L87 Difference]: Start difference. First operand 4780 states and 11693 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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) [2021-05-21 21:12:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:42,868 INFO L93 Difference]: Finished difference Result 6903 states and 16158 transitions. [2021-05-21 21:12:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-21 21:12:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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 47 [2021-05-21 21:12:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:42,875 INFO L225 Difference]: With dead ends: 6903 [2021-05-21 21:12:42,875 INFO L226 Difference]: Without dead ends: 6899 [2021-05-21 21:12:42,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2003.3ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-05-21 21:12:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-05-21 21:12:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4480. [2021-05-21 21:12:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 2.444965394061174) internal successors, (10951), 4479 states have internal predecessors, (10951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 10951 transitions. [2021-05-21 21:12:42,925 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 10951 transitions. Word has length 47 [2021-05-21 21:12:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:42,925 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 10951 transitions. [2021-05-21 21:12:42,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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) [2021-05-21 21:12:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 10951 transitions. [2021-05-21 21:12:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:12:42,930 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:42,930 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:43,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 21:12:43,134 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:43,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 56 times [2021-05-21 21:12:43,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:43,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948418923] [2021-05-21 21:12:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:43,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948418923] [2021-05-21 21:12:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948418923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273351289] [2021-05-21 21:12:43,278 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 [2021-05-21 21:12:43,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:43,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:12:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:43,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273351289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:43,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:43,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-05-21 21:12:43,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485264055] [2021-05-21 21:12:43,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:12:43,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:12:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:12:43,773 INFO L87 Difference]: Start difference. First operand 4480 states and 10951 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:47,974 INFO L93 Difference]: Finished difference Result 10549 states and 24047 transitions. [2021-05-21 21:12:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-21 21:12:47,975 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:47,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:47,984 INFO L225 Difference]: With dead ends: 10549 [2021-05-21 21:12:47,984 INFO L226 Difference]: Without dead ends: 10501 [2021-05-21 21:12:47,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 2812.9ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-05-21 21:12:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-05-21 21:12:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 4420. [2021-05-21 21:12:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 2.4433129667345552) internal successors, (10797), 4419 states have internal predecessors, (10797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 10797 transitions. [2021-05-21 21:12:48,046 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 10797 transitions. Word has length 47 [2021-05-21 21:12:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:48,047 INFO L482 AbstractCegarLoop]: Abstraction has 4420 states and 10797 transitions. [2021-05-21 21:12:48,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 10797 transitions. [2021-05-21 21:12:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:12:48,050 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:48,050 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:48,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 21:12:48,250 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:48,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 57 times [2021-05-21 21:12:48,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:48,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310714551] [2021-05-21 21:12:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:48,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:48,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310714551] [2021-05-21 21:12:48,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310714551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:48,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108470066] [2021-05-21 21:12:48,403 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 [2021-05-21 21:12:48,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 21:12:48,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:12:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:48,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108470066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:48,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:48,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-05-21 21:12:48,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290719946] [2021-05-21 21:12:48,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:12:48,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:48,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:12:48,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:12:48,896 INFO L87 Difference]: Start difference. First operand 4420 states and 10797 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:52,949 INFO L93 Difference]: Finished difference Result 12102 states and 27344 transitions. [2021-05-21 21:12:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-21 21:12:52,950 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:52,960 INFO L225 Difference]: With dead ends: 12102 [2021-05-21 21:12:52,960 INFO L226 Difference]: Without dead ends: 12024 [2021-05-21 21:12:52,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 2872.1ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-05-21 21:12:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-05-21 21:12:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 4352. [2021-05-21 21:12:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 2.4474833371638702) internal successors, (10649), 4351 states have internal predecessors, (10649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 10649 transitions. [2021-05-21 21:12:53,025 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 10649 transitions. Word has length 47 [2021-05-21 21:12:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:53,025 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 10649 transitions. [2021-05-21 21:12:53,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 10649 transitions. [2021-05-21 21:12:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:12:53,028 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:53,028 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:53,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:53,237 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:53,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:53,237 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 58 times [2021-05-21 21:12:53,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:53,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392487493] [2021-05-21 21:12:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:53,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:53,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392487493] [2021-05-21 21:12:53,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392487493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:53,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900432461] [2021-05-21 21:12:53,380 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) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:53,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:53,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:53,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 21:12:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:53,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900432461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:53,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:53,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-05-21 21:12:53,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963299998] [2021-05-21 21:12:53,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 21:12:53,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 21:12:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:12:53,845 INFO L87 Difference]: Start difference. First operand 4352 states and 10649 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:56,430 INFO L93 Difference]: Finished difference Result 14421 states and 32596 transitions. [2021-05-21 21:12:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-21 21:12:56,431 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:12:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:56,446 INFO L225 Difference]: With dead ends: 14421 [2021-05-21 21:12:56,446 INFO L226 Difference]: Without dead ends: 14229 [2021-05-21 21:12:56,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 2125.8ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-05-21 21:12:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14229 states. [2021-05-21 21:12:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14229 to 4384. [2021-05-21 21:12:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4442162902121836) internal successors, (10713), 4383 states have internal predecessors, (10713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10713 transitions. [2021-05-21 21:12:56,527 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10713 transitions. Word has length 47 [2021-05-21 21:12:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:56,527 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 10713 transitions. [2021-05-21 21:12:56,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10713 transitions. [2021-05-21 21:12:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:12:56,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:56,530 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:56,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-05-21 21:12:56,730 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:56,731 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 59 times [2021-05-21 21:12:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:56,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843510421] [2021-05-21 21:12:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:56,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:56,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843510421] [2021-05-21 21:12:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843510421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:56,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775566921] [2021-05-21 21:12:56,893 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 [2021-05-21 21:12:56,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 21:12:56,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:56,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:57,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775566921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:57,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:57,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-05-21 21:12:57,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479578264] [2021-05-21 21:12:57,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-21 21:12:57,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:57,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-21 21:12:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 21:12:57,352 INFO L87 Difference]: Start difference. First operand 4384 states and 10713 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:00,333 INFO L93 Difference]: Finished difference Result 14220 states and 31957 transitions. [2021-05-21 21:13:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-21 21:13:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:13:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:00,349 INFO L225 Difference]: With dead ends: 14220 [2021-05-21 21:13:00,349 INFO L226 Difference]: Without dead ends: 13917 [2021-05-21 21:13:00,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8361 ImplicationChecksByTransitivity, 2536.6ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-05-21 21:13:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2021-05-21 21:13:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 4404. [2021-05-21 21:13:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.4421985010220304) internal successors, (10753), 4403 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 10753 transitions. [2021-05-21 21:13:00,430 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 10753 transitions. Word has length 47 [2021-05-21 21:13:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:00,430 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 10753 transitions. [2021-05-21 21:13:00,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 10753 transitions. [2021-05-21 21:13:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:13:00,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:00,433 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:00,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:00,634 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:00,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 60 times [2021-05-21 21:13:00,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:00,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646071813] [2021-05-21 21:13:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:00,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:00,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646071813] [2021-05-21 21:13:00,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646071813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:00,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128802104] [2021-05-21 21:13:00,822 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 [2021-05-21 21:13:00,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:13:00,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-21 21:13:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128802104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:01,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:01,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:13:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212949514] [2021-05-21 21:13:01,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:13:01,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:01,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:13:01,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:13:01,315 INFO L87 Difference]: Start difference. First operand 4404 states and 10753 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:04,451 INFO L93 Difference]: Finished difference Result 13609 states and 30879 transitions. [2021-05-21 21:13:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-21 21:13:04,451 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:13:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:04,463 INFO L225 Difference]: With dead ends: 13609 [2021-05-21 21:13:04,463 INFO L226 Difference]: Without dead ends: 13078 [2021-05-21 21:13:04,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8506 ImplicationChecksByTransitivity, 2849.0ms TimeCoverageRelationStatistics Valid=4891, Invalid=19289, Unknown=0, NotChecked=0, Total=24180 [2021-05-21 21:13:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-05-21 21:13:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 4605. [2021-05-21 21:13:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.386185925282363) internal successors, (10986), 4604 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 10986 transitions. [2021-05-21 21:13:04,540 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 10986 transitions. Word has length 47 [2021-05-21 21:13:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:04,540 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 10986 transitions. [2021-05-21 21:13:04,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 10986 transitions. [2021-05-21 21:13:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:13:04,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:04,544 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:04,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-05-21 21:13:04,745 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:04,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:04,745 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 61 times [2021-05-21 21:13:04,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:04,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370548870] [2021-05-21 21:13:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:04,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:04,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370548870] [2021-05-21 21:13:04,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370548870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:04,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974060582] [2021-05-21 21:13:04,849 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 [2021-05-21 21:13:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 21:13:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:05,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974060582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:05,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:05,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2021-05-21 21:13:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956327357] [2021-05-21 21:13:05,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:13:05,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:13:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:13:05,269 INFO L87 Difference]: Start difference. First operand 4605 states and 10986 transitions. Second operand has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 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) [2021-05-21 21:13:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:07,899 INFO L93 Difference]: Finished difference Result 9014 states and 20637 transitions. [2021-05-21 21:13:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-21 21:13:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 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 47 [2021-05-21 21:13:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:07,908 INFO L225 Difference]: With dead ends: 9014 [2021-05-21 21:13:07,908 INFO L226 Difference]: Without dead ends: 9010 [2021-05-21 21:13:07,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6196 ImplicationChecksByTransitivity, 2356.5ms TimeCoverageRelationStatistics Valid=3809, Invalid=13221, Unknown=0, NotChecked=0, Total=17030 [2021-05-21 21:13:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-05-21 21:13:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4724. [2021-05-21 21:13:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 2.4084268473427906) internal successors, (11375), 4723 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 11375 transitions. [2021-05-21 21:13:07,972 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 11375 transitions. Word has length 47 [2021-05-21 21:13:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:07,973 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 11375 transitions. [2021-05-21 21:13:07,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 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) [2021-05-21 21:13:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 11375 transitions. [2021-05-21 21:13:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 21:13:07,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:07,976 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:08,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:08,176 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 62 times [2021-05-21 21:13:08,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:08,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750164463] [2021-05-21 21:13:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:08,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:08,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750164463] [2021-05-21 21:13:08,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750164463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:08,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209815205] [2021-05-21 21:13:08,357 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 [2021-05-21 21:13:08,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:13:08,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:08,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 21:13:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:08,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209815205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:08,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:08,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-05-21 21:13:08,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096129952] [2021-05-21 21:13:08,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-21 21:13:08,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:08,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-21 21:13:08,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 21:13:08,834 INFO L87 Difference]: Start difference. First operand 4724 states and 11375 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:12,035 INFO L93 Difference]: Finished difference Result 6691 states and 15329 transitions. [2021-05-21 21:13:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-21 21:13:12,035 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:13:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:12,040 INFO L225 Difference]: With dead ends: 6691 [2021-05-21 21:13:12,040 INFO L226 Difference]: Without dead ends: 6421 [2021-05-21 21:13:12,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 2892.6ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-05-21 21:13:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-05-21 21:13:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4591. [2021-05-21 21:13:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 2.4004357298474948) internal successors, (11018), 4590 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 11018 transitions. [2021-05-21 21:13:12,090 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 11018 transitions. Word has length 49 [2021-05-21 21:13:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:12,090 INFO L482 AbstractCegarLoop]: Abstraction has 4591 states and 11018 transitions. [2021-05-21 21:13:12,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:12,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 11018 transitions. [2021-05-21 21:13:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 21:13:12,093 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:12,093 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:12,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-05-21 21:13:12,297 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 63 times [2021-05-21 21:13:12,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:12,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98195759] [2021-05-21 21:13:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:12,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:12,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98195759] [2021-05-21 21:13:12,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98195759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:12,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843296067] [2021-05-21 21:13:12,388 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 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 [2021-05-21 21:13:12,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 21:13:12,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-21 21:13:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 17 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:12,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843296067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:12,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:12,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2021-05-21 21:13:12,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978390435] [2021-05-21 21:13:12,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:12,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:12,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:12,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:12,868 INFO L87 Difference]: Start difference. First operand 4591 states and 11018 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:18,250 INFO L93 Difference]: Finished difference Result 8254 states and 18601 transitions. [2021-05-21 21:13:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-05-21 21:13:18,251 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:13:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:18,257 INFO L225 Difference]: With dead ends: 8254 [2021-05-21 21:13:18,257 INFO L226 Difference]: Without dead ends: 8250 [2021-05-21 21:13:18,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19820 ImplicationChecksByTransitivity, 4717.0ms TimeCoverageRelationStatistics Valid=9481, Invalid=36529, Unknown=0, NotChecked=0, Total=46010 [2021-05-21 21:13:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8250 states. [2021-05-21 21:13:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8250 to 4599. [2021-05-21 21:13:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 4598 states have (on average 2.4006089604175727) internal successors, (11038), 4598 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 11038 transitions. [2021-05-21 21:13:18,308 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 11038 transitions. Word has length 49 [2021-05-21 21:13:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:18,308 INFO L482 AbstractCegarLoop]: Abstraction has 4599 states and 11038 transitions. [2021-05-21 21:13:18,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 11038 transitions. [2021-05-21 21:13:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:18,312 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:18,312 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:18,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:18,512 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 64 times [2021-05-21 21:13:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734913197] [2021-05-21 21:13:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:18,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:18,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734913197] [2021-05-21 21:13:18,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734913197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:18,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398448237] [2021-05-21 21:13:18,607 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 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 [2021-05-21 21:13:18,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:13:18,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 21:13:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:18,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398448237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:18,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:18,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-21 21:13:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622847778] [2021-05-21 21:13:18,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:13:18,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:13:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:13:18,702 INFO L87 Difference]: Start difference. First operand 4599 states and 11038 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:18,826 INFO L93 Difference]: Finished difference Result 5889 states and 14053 transitions. [2021-05-21 21:13:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:13:18,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:13:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:18,832 INFO L225 Difference]: With dead ends: 5889 [2021-05-21 21:13:18,832 INFO L226 Difference]: Without dead ends: 5820 [2021-05-21 21:13:18,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:13:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-05-21 21:13:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5433. [2021-05-21 21:13:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5432 states have (on average 2.43740795287187) internal successors, (13240), 5432 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 13240 transitions. [2021-05-21 21:13:18,887 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 13240 transitions. Word has length 51 [2021-05-21 21:13:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:18,887 INFO L482 AbstractCegarLoop]: Abstraction has 5433 states and 13240 transitions. [2021-05-21 21:13:18,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 13240 transitions. [2021-05-21 21:13:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:18,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:18,891 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:19,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-21 21:13:19,091 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:19,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:19,091 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 65 times [2021-05-21 21:13:19,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:19,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772008132] [2021-05-21 21:13:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:19,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:19,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772008132] [2021-05-21 21:13:19,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772008132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:19,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360280375] [2021-05-21 21:13:19,363 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 [2021-05-21 21:13:19,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 21:13:19,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:19,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-21 21:13:19,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:20,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360280375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:20,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:20,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-05-21 21:13:20,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474118641] [2021-05-21 21:13:20,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-21 21:13:20,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:20,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-21 21:13:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:13:20,006 INFO L87 Difference]: Start difference. First operand 5433 states and 13240 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:23,220 INFO L93 Difference]: Finished difference Result 7094 states and 16636 transitions. [2021-05-21 21:13:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-21 21:13:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:13:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:23,230 INFO L225 Difference]: With dead ends: 7094 [2021-05-21 21:13:23,230 INFO L226 Difference]: Without dead ends: 7088 [2021-05-21 21:13:23,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 2521.0ms TimeCoverageRelationStatistics Valid=1100, Invalid=12706, Unknown=0, NotChecked=0, Total=13806 [2021-05-21 21:13:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2021-05-21 21:13:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 5314. [2021-05-21 21:13:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 5313 states have (on average 2.43553547901374) internal successors, (12940), 5313 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 12940 transitions. [2021-05-21 21:13:23,299 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 12940 transitions. Word has length 51 [2021-05-21 21:13:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:23,299 INFO L482 AbstractCegarLoop]: Abstraction has 5314 states and 12940 transitions. [2021-05-21 21:13:23,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 12940 transitions. [2021-05-21 21:13:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:23,304 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:23,304 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:23,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-21 21:13:23,520 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 66 times [2021-05-21 21:13:23,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:23,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40790831] [2021-05-21 21:13:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:23,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:23,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40790831] [2021-05-21 21:13:23,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40790831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:23,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607782809] [2021-05-21 21:13:23,718 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 [2021-05-21 21:13:23,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 21:13:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:23,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-21 21:13:23,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:24,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607782809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:24,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:24,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-05-21 21:13:24,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124917579] [2021-05-21 21:13:24,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 21:13:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 21:13:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:13:24,288 INFO L87 Difference]: Start difference. First operand 5314 states and 12940 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:28,598 INFO L93 Difference]: Finished difference Result 10585 states and 24178 transitions. [2021-05-21 21:13:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-21 21:13:28,598 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:13:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:28,609 INFO L225 Difference]: With dead ends: 10585 [2021-05-21 21:13:28,609 INFO L226 Difference]: Without dead ends: 10561 [2021-05-21 21:13:28,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 2882.9ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-05-21 21:13:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-05-21 21:13:28,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 5782. [2021-05-21 21:13:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5782 states, 5781 states have (on average 2.44075419477599) internal successors, (14110), 5781 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 14110 transitions. [2021-05-21 21:13:28,686 INFO L78 Accepts]: Start accepts. Automaton has 5782 states and 14110 transitions. Word has length 51 [2021-05-21 21:13:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:28,686 INFO L482 AbstractCegarLoop]: Abstraction has 5782 states and 14110 transitions. [2021-05-21 21:13:28,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5782 states and 14110 transitions. [2021-05-21 21:13:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:28,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:28,690 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:28,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-05-21 21:13:28,901 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash 279303115, now seen corresponding path program 67 times [2021-05-21 21:13:28,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:28,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283512658] [2021-05-21 21:13:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:29,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:29,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283512658] [2021-05-21 21:13:29,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283512658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:29,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782095259] [2021-05-21 21:13:29,049 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 [2021-05-21 21:13:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-21 21:13:29,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:29,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782095259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:29,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:29,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-05-21 21:13:29,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681366766] [2021-05-21 21:13:29,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:13:29,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:29,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:13:29,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:13:29,627 INFO L87 Difference]: Start difference. First operand 5782 states and 14110 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:33,145 INFO L93 Difference]: Finished difference Result 8201 states and 19178 transitions. [2021-05-21 21:13:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-21 21:13:33,146 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:13:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:33,152 INFO L225 Difference]: With dead ends: 8201 [2021-05-21 21:13:33,152 INFO L226 Difference]: Without dead ends: 8197 [2021-05-21 21:13:33,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 2456.0ms TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-05-21 21:13:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-05-21 21:13:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 5452. [2021-05-21 21:13:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 2.439185470555861) internal successors, (13296), 5451 states have internal predecessors, (13296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 13296 transitions. [2021-05-21 21:13:33,209 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 13296 transitions. Word has length 51 [2021-05-21 21:13:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:33,209 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 13296 transitions. [2021-05-21 21:13:33,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 13296 transitions. [2021-05-21 21:13:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:33,213 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:33,213 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:33,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:33,433 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:33,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1388875227, now seen corresponding path program 68 times [2021-05-21 21:13:33,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:33,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838093645] [2021-05-21 21:13:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:33,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:33,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838093645] [2021-05-21 21:13:33,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838093645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:33,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752893608] [2021-05-21 21:13:33,607 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 [2021-05-21 21:13:33,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:13:33,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:34,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752893608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:34,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:34,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-05-21 21:13:34,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38442064] [2021-05-21 21:13:34,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-21 21:13:34,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:34,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-21 21:13:34,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 21:13:34,221 INFO L87 Difference]: Start difference. First operand 5452 states and 13296 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:39,556 INFO L93 Difference]: Finished difference Result 12411 states and 28171 transitions. [2021-05-21 21:13:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-21 21:13:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:13:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:39,568 INFO L225 Difference]: With dead ends: 12411 [2021-05-21 21:13:39,569 INFO L226 Difference]: Without dead ends: 12363 [2021-05-21 21:13:39,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 3544.6ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-05-21 21:13:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2021-05-21 21:13:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 5448. [2021-05-21 21:13:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.4384064622728108) internal successors, (13282), 5447 states have internal predecessors, (13282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 13282 transitions. [2021-05-21 21:13:39,652 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 13282 transitions. Word has length 51 [2021-05-21 21:13:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:39,652 INFO L482 AbstractCegarLoop]: Abstraction has 5448 states and 13282 transitions. [2021-05-21 21:13:39,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 13282 transitions. [2021-05-21 21:13:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:39,656 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:39,656 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:39,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:39,857 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:39,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1681194409, now seen corresponding path program 69 times [2021-05-21 21:13:39,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:39,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419910397] [2021-05-21 21:13:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:40,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:40,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419910397] [2021-05-21 21:13:40,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419910397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:40,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282705325] [2021-05-21 21:13:40,029 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 [2021-05-21 21:13:40,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 21:13:40,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:40,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:40,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:40,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282705325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:40,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:40,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-05-21 21:13:40,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253258375] [2021-05-21 21:13:40,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-21 21:13:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-21 21:13:40,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 21:13:40,595 INFO L87 Difference]: Start difference. First operand 5448 states and 13282 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:46,057 INFO L93 Difference]: Finished difference Result 15077 states and 34147 transitions. [2021-05-21 21:13:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-05-21 21:13:46,058 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:13:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:46,074 INFO L225 Difference]: With dead ends: 15077 [2021-05-21 21:13:46,074 INFO L226 Difference]: Without dead ends: 14999 [2021-05-21 21:13:46,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 3800.5ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-05-21 21:13:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14999 states. [2021-05-21 21:13:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14999 to 5335. [2021-05-21 21:13:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5334 states have (on average 2.4401949756280463) internal successors, (13016), 5334 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 13016 transitions. [2021-05-21 21:13:46,197 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 13016 transitions. Word has length 51 [2021-05-21 21:13:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:46,197 INFO L482 AbstractCegarLoop]: Abstraction has 5335 states and 13016 transitions. [2021-05-21 21:13:46,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 13016 transitions. [2021-05-21 21:13:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:46,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:46,201 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:46,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-21 21:13:46,405 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash -393169363, now seen corresponding path program 70 times [2021-05-21 21:13:46,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:46,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863072802] [2021-05-21 21:13:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:46,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:46,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863072802] [2021-05-21 21:13:46,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863072802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:46,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216176659] [2021-05-21 21:13:46,593 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 [2021-05-21 21:13:46,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:13:46,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:46,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-21 21:13:46,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:47,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216176659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:47,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:47,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-05-21 21:13:47,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540231093] [2021-05-21 21:13:47,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:13:47,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:13:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:13:47,124 INFO L87 Difference]: Start difference. First operand 5335 states and 13016 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:51,268 INFO L93 Difference]: Finished difference Result 16843 states and 37762 transitions. [2021-05-21 21:13:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-21 21:13:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:13:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:51,284 INFO L225 Difference]: With dead ends: 16843 [2021-05-21 21:13:51,284 INFO L226 Difference]: Without dead ends: 16573 [2021-05-21 21:13:51,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10182 ImplicationChecksByTransitivity, 3187.8ms TimeCoverageRelationStatistics Valid=4084, Invalid=23972, Unknown=0, NotChecked=0, Total=28056 [2021-05-21 21:13:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2021-05-21 21:13:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 5289. [2021-05-21 21:13:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 5288 states have (on average 2.440998487140696) internal successors, (12908), 5288 states have internal predecessors, (12908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 12908 transitions. [2021-05-21 21:13:51,366 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 12908 transitions. Word has length 51 [2021-05-21 21:13:51,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:51,366 INFO L482 AbstractCegarLoop]: Abstraction has 5289 states and 12908 transitions. [2021-05-21 21:13:51,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 12908 transitions. [2021-05-21 21:13:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:51,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:51,369 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:51,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-05-21 21:13:51,569 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:51,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1111204943, now seen corresponding path program 71 times [2021-05-21 21:13:51,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:51,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218096431] [2021-05-21 21:13:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:51,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:51,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218096431] [2021-05-21 21:13:51,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218096431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:51,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807365679] [2021-05-21 21:13:51,751 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 [2021-05-21 21:13:51,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 21:13:51,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:51,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-21 21:13:51,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:52,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807365679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:52,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:52,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-05-21 21:13:52,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473285081] [2021-05-21 21:13:52,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-21 21:13:52,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-21 21:13:52,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:13:52,308 INFO L87 Difference]: Start difference. First operand 5289 states and 12908 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:55,939 INFO L93 Difference]: Finished difference Result 18875 states and 42539 transitions. [2021-05-21 21:13:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-21 21:13:55,939 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:13:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:55,959 INFO L225 Difference]: With dead ends: 18875 [2021-05-21 21:13:55,959 INFO L226 Difference]: Without dead ends: 18587 [2021-05-21 21:13:55,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9833 ImplicationChecksByTransitivity, 2980.0ms TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-05-21 21:13:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18587 states. [2021-05-21 21:13:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18587 to 5317. [2021-05-21 21:13:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5316 states have (on average 2.438675696012039) internal successors, (12964), 5316 states have internal predecessors, (12964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 12964 transitions. [2021-05-21 21:13:56,070 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 12964 transitions. Word has length 51 [2021-05-21 21:13:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:56,071 INFO L482 AbstractCegarLoop]: Abstraction has 5317 states and 12964 transitions. [2021-05-21 21:13:56,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 12964 transitions. [2021-05-21 21:13:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:13:56,074 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:56,074 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:56,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:56,275 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:56,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:56,275 INFO L82 PathProgramCache]: Analyzing trace with hash -547770827, now seen corresponding path program 72 times [2021-05-21 21:13:56,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:56,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163291671] [2021-05-21 21:13:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:56,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:56,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163291671] [2021-05-21 21:13:56,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163291671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:56,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500548205] [2021-05-21 21:13:56,473 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 [2021-05-21 21:13:56,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 21:13:56,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-21 21:13:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:57,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500548205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:57,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:57,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-05-21 21:13:57,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243325220] [2021-05-21 21:13:57,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-21 21:13:57,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:57,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-21 21:13:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:13:57,006 INFO L87 Difference]: Start difference. First operand 5317 states and 12964 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:00,740 INFO L93 Difference]: Finished difference Result 16588 states and 36726 transitions. [2021-05-21 21:14:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-21 21:14:00,741 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:14:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:00,758 INFO L225 Difference]: With dead ends: 16588 [2021-05-21 21:14:00,758 INFO L226 Difference]: Without dead ends: 16174 [2021-05-21 21:14:00,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12160 ImplicationChecksByTransitivity, 3222.8ms TimeCoverageRelationStatistics Valid=5931, Invalid=25575, Unknown=0, NotChecked=0, Total=31506 [2021-05-21 21:14:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2021-05-21 21:14:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 5337. [2021-05-21 21:14:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 2.437031484257871) internal successors, (13004), 5336 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 13004 transitions. [2021-05-21 21:14:00,857 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 13004 transitions. Word has length 51 [2021-05-21 21:14:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:00,857 INFO L482 AbstractCegarLoop]: Abstraction has 5337 states and 13004 transitions. [2021-05-21 21:14:00,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 13004 transitions. [2021-05-21 21:14:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:14:00,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:00,861 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:01,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:01,061 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1021996473, now seen corresponding path program 73 times [2021-05-21 21:14:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:01,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248402908] [2021-05-21 21:14:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:01,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:01,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248402908] [2021-05-21 21:14:01,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248402908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:01,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294667890] [2021-05-21 21:14:01,276 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 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 [2021-05-21 21:14:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:14:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:01,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294667890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:01,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:01,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-05-21 21:14:01,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091486276] [2021-05-21 21:14:01,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-21 21:14:01,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-21 21:14:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:14:01,800 INFO L87 Difference]: Start difference. First operand 5337 states and 13004 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:05,352 INFO L93 Difference]: Finished difference Result 16800 states and 38164 transitions. [2021-05-21 21:14:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-21 21:14:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:14:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:05,368 INFO L225 Difference]: With dead ends: 16800 [2021-05-21 21:14:05,369 INFO L226 Difference]: Without dead ends: 16146 [2021-05-21 21:14:05,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 3094.4ms TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-05-21 21:14:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2021-05-21 21:14:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 4803. [2021-05-21 21:14:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 2.4123281965847565) internal successors, (11584), 4802 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 11584 transitions. [2021-05-21 21:14:05,470 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 11584 transitions. Word has length 51 [2021-05-21 21:14:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:05,470 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 11584 transitions. [2021-05-21 21:14:05,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 11584 transitions. [2021-05-21 21:14:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-21 21:14:05,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:05,474 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:05,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:05,674 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash -607302967, now seen corresponding path program 74 times [2021-05-21 21:14:05,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:05,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473053021] [2021-05-21 21:14:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:05,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:05,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473053021] [2021-05-21 21:14:05,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473053021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:05,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873814507] [2021-05-21 21:14:05,881 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 [2021-05-21 21:14:05,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:14:05,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-21 21:14:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:06,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873814507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:06,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:06,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-05-21 21:14:06,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734070056] [2021-05-21 21:14:06,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-21 21:14:06,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-21 21:14:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:14:06,440 INFO L87 Difference]: Start difference. First operand 4803 states and 11584 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:10,502 INFO L93 Difference]: Finished difference Result 6738 states and 15323 transitions. [2021-05-21 21:14:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-05-21 21:14:10,502 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-05-21 21:14:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:10,523 INFO L225 Difference]: With dead ends: 6738 [2021-05-21 21:14:10,523 INFO L226 Difference]: Without dead ends: 6426 [2021-05-21 21:14:10,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 3681.0ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-05-21 21:14:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-05-21 21:14:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 4802. [2021-05-21 21:14:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409289731305978) internal successors, (11567), 4801 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11567 transitions. [2021-05-21 21:14:10,570 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11567 transitions. Word has length 53 [2021-05-21 21:14:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:10,570 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11567 transitions. [2021-05-21 21:14:10,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11567 transitions. [2021-05-21 21:14:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-21 21:14:10,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:10,574 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:10,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:10,789 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1343145563, now seen corresponding path program 75 times [2021-05-21 21:14:10,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:10,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910803459] [2021-05-21 21:14:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:10,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:10,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910803459] [2021-05-21 21:14:10,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910803459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:10,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711929339] [2021-05-21 21:14:10,893 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 [2021-05-21 21:14:10,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 21:14:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:14:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:11,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711929339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:11,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:11,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-05-21 21:14:11,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886776500] [2021-05-21 21:14:11,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:14:11,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:14:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:14:11,466 INFO L87 Difference]: Start difference. First operand 4802 states and 11567 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:18,305 INFO L93 Difference]: Finished difference Result 6316 states and 14547 transitions. [2021-05-21 21:14:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-05-21 21:14:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-05-21 21:14:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:18,311 INFO L225 Difference]: With dead ends: 6316 [2021-05-21 21:14:18,311 INFO L226 Difference]: Without dead ends: 6312 [2021-05-21 21:14:18,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 6460.3ms TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-05-21 21:14:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-05-21 21:14:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 4802. [2021-05-21 21:14:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409081441366382) internal successors, (11566), 4801 states have internal predecessors, (11566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11566 transitions. [2021-05-21 21:14:18,359 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11566 transitions. Word has length 53 [2021-05-21 21:14:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:18,359 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11566 transitions. [2021-05-21 21:14:18,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11566 transitions. [2021-05-21 21:14:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:14:18,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:18,362 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:18,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:18,563 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:18,563 INFO L82 PathProgramCache]: Analyzing trace with hash -425284857, now seen corresponding path program 76 times [2021-05-21 21:14:18,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:18,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057170015] [2021-05-21 21:14:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:18,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:18,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057170015] [2021-05-21 21:14:18,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057170015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:18,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005948245] [2021-05-21 21:14:18,671 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 [2021-05-21 21:14:18,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:14:18,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:18,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:14:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:18,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005948245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:18,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:18,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-21 21:14:18,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726782182] [2021-05-21 21:14:18,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:14:18,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:14:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:14:18,776 INFO L87 Difference]: Start difference. First operand 4802 states and 11566 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:18,914 INFO L93 Difference]: Finished difference Result 6109 states and 14541 transitions. [2021-05-21 21:14:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:14:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:14:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:18,920 INFO L225 Difference]: With dead ends: 6109 [2021-05-21 21:14:18,920 INFO L226 Difference]: Without dead ends: 6034 [2021-05-21 21:14:18,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:14:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2021-05-21 21:14:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5577. [2021-05-21 21:14:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5576 states have (on average 2.438307030129125) internal successors, (13596), 5576 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 13596 transitions. [2021-05-21 21:14:18,980 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 13596 transitions. Word has length 55 [2021-05-21 21:14:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:18,980 INFO L482 AbstractCegarLoop]: Abstraction has 5577 states and 13596 transitions. [2021-05-21 21:14:18,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 13596 transitions. [2021-05-21 21:14:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:14:18,984 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:18,984 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:19,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:19,185 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1144269145, now seen corresponding path program 77 times [2021-05-21 21:14:19,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:19,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907874013] [2021-05-21 21:14:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:19,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:19,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907874013] [2021-05-21 21:14:19,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907874013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:19,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046487638] [2021-05-21 21:14:19,496 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 [2021-05-21 21:14:19,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 21:14:19,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-21 21:14:19,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:20,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046487638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:20,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:20,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-05-21 21:14:20,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47917469] [2021-05-21 21:14:20,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-21 21:14:20,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:20,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-21 21:14:20,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 21:14:20,231 INFO L87 Difference]: Start difference. First operand 5577 states and 13596 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:24,190 INFO L93 Difference]: Finished difference Result 7325 states and 17131 transitions. [2021-05-21 21:14:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-21 21:14:24,190 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:14:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:24,197 INFO L225 Difference]: With dead ends: 7325 [2021-05-21 21:14:24,197 INFO L226 Difference]: Without dead ends: 7319 [2021-05-21 21:14:24,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 3013.8ms TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-05-21 21:14:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2021-05-21 21:14:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 5539. [2021-05-21 21:14:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 5538 states have (on average 2.438605994944023) internal successors, (13505), 5538 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 13505 transitions. [2021-05-21 21:14:24,256 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 13505 transitions. Word has length 55 [2021-05-21 21:14:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:24,256 INFO L482 AbstractCegarLoop]: Abstraction has 5539 states and 13505 transitions. [2021-05-21 21:14:24,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 13505 transitions. [2021-05-21 21:14:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:14:24,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:24,260 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:24,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-05-21 21:14:24,461 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1722012963, now seen corresponding path program 78 times [2021-05-21 21:14:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:24,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227605661] [2021-05-21 21:14:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:24,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227605661] [2021-05-21 21:14:24,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227605661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963195709] [2021-05-21 21:14:24,643 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 [2021-05-21 21:14:24,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 21:14:24,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:14:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:25,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963195709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:25,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:25,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-05-21 21:14:25,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515506602] [2021-05-21 21:14:25,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:14:25,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:14:25,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:14:25,267 INFO L87 Difference]: Start difference. First operand 5539 states and 13505 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:30,353 INFO L93 Difference]: Finished difference Result 10773 states and 24488 transitions. [2021-05-21 21:14:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-21 21:14:30,353 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:14:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:30,362 INFO L225 Difference]: With dead ends: 10773 [2021-05-21 21:14:30,362 INFO L226 Difference]: Without dead ends: 10749 [2021-05-21 21:14:30,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 3313.6ms TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-05-21 21:14:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-05-21 21:14:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 5893. [2021-05-21 21:14:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 2.4414460285132384) internal successors, (14385), 5892 states have internal predecessors, (14385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 14385 transitions. [2021-05-21 21:14:30,438 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 14385 transitions. Word has length 55 [2021-05-21 21:14:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:30,438 INFO L482 AbstractCegarLoop]: Abstraction has 5893 states and 14385 transitions. [2021-05-21 21:14:30,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 14385 transitions. [2021-05-21 21:14:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:14:30,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:30,443 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:30,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:30,643 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:30,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1842588423, now seen corresponding path program 79 times [2021-05-21 21:14:30,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:30,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083814055] [2021-05-21 21:14:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:30,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:30,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083814055] [2021-05-21 21:14:30,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083814055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:30,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121957864] [2021-05-21 21:14:30,807 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 [2021-05-21 21:14:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:30,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:14:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:31,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121957864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:31,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:31,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-05-21 21:14:31,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984459966] [2021-05-21 21:14:31,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-21 21:14:31,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:31,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-21 21:14:31,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 21:14:31,452 INFO L87 Difference]: Start difference. First operand 5893 states and 14385 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:35,850 INFO L93 Difference]: Finished difference Result 8165 states and 19006 transitions. [2021-05-21 21:14:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-21 21:14:35,851 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:14:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:35,858 INFO L225 Difference]: With dead ends: 8165 [2021-05-21 21:14:35,858 INFO L226 Difference]: Without dead ends: 8161 [2021-05-21 21:14:35,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 2757.8ms TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-05-21 21:14:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-05-21 21:14:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 5628. [2021-05-21 21:14:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5627 states have (on average 2.438955038208637) internal successors, (13724), 5627 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 13724 transitions. [2021-05-21 21:14:35,916 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 13724 transitions. Word has length 55 [2021-05-21 21:14:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:35,916 INFO L482 AbstractCegarLoop]: Abstraction has 5628 states and 13724 transitions. [2021-05-21 21:14:35,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:35,916 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 13724 transitions. [2021-05-21 21:14:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:14:35,919 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:35,919 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:36,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:36,125 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1694161249, now seen corresponding path program 80 times [2021-05-21 21:14:36,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:36,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550337] [2021-05-21 21:14:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:36,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:36,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550337] [2021-05-21 21:14:36,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:36,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607452712] [2021-05-21 21:14:36,308 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 [2021-05-21 21:14:36,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:14:36,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-21 21:14:36,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:36,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607452712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:36,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:36,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-05-21 21:14:36,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960027310] [2021-05-21 21:14:36,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-21 21:14:36,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-21 21:14:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 21:14:36,954 INFO L87 Difference]: Start difference. First operand 5628 states and 13724 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:43,887 INFO L93 Difference]: Finished difference Result 12946 states and 29248 transitions. [2021-05-21 21:14:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-05-21 21:14:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:14:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:43,898 INFO L225 Difference]: With dead ends: 12946 [2021-05-21 21:14:43,898 INFO L226 Difference]: Without dead ends: 12898 [2021-05-21 21:14:43,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 4094.3ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-05-21 21:14:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2021-05-21 21:14:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 5600. [2021-05-21 21:14:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 2.4365065190212536) internal successors, (13642), 5599 states have internal predecessors, (13642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 13642 transitions. [2021-05-21 21:14:43,985 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 13642 transitions. Word has length 55 [2021-05-21 21:14:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:43,985 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 13642 transitions. [2021-05-21 21:14:43,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 13642 transitions. [2021-05-21 21:14:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:14:43,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:43,988 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:44,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-21 21:14:44,192 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash 661255397, now seen corresponding path program 81 times [2021-05-21 21:14:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:44,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938721838] [2021-05-21 21:14:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:44,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:44,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938721838] [2021-05-21 21:14:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938721838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:44,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043169527] [2021-05-21 21:14:44,372 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 [2021-05-21 21:14:44,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 21:14:44,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-21 21:14:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:44,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043169527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:44,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:44,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2021-05-21 21:14:44,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295806929] [2021-05-21 21:14:44,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-21 21:14:44,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:44,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-21 21:14:44,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:14:44,982 INFO L87 Difference]: Start difference. First operand 5600 states and 13642 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:51,461 INFO L93 Difference]: Finished difference Result 14970 states and 33594 transitions. [2021-05-21 21:14:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-05-21 21:14:51,461 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:14:51,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:51,472 INFO L225 Difference]: With dead ends: 14970 [2021-05-21 21:14:51,473 INFO L226 Difference]: Without dead ends: 14892 [2021-05-21 21:14:51,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16664 ImplicationChecksByTransitivity, 4600.3ms TimeCoverageRelationStatistics Valid=5098, Invalid=40058, Unknown=0, NotChecked=0, Total=45156 [2021-05-21 21:14:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-05-21 21:14:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 5524. [2021-05-21 21:14:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4349085641861308) internal successors, (13448), 5523 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13448 transitions. [2021-05-21 21:14:51,545 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13448 transitions. Word has length 55 [2021-05-21 21:14:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:51,545 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13448 transitions. [2021-05-21 21:14:51,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13448 transitions. [2021-05-21 21:14:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:14:51,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:51,549 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:51,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:51,749 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:51,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:51,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1592574615, now seen corresponding path program 82 times [2021-05-21 21:14:51,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:51,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939668235] [2021-05-21 21:14:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:51,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:51,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939668235] [2021-05-21 21:14:51,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939668235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:51,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877913442] [2021-05-21 21:14:51,958 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 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 [2021-05-21 21:14:51,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:14:51,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:51,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-21 21:14:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:52,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877913442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:52,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:52,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-05-21 21:14:52,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145230825] [2021-05-21 21:14:52,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-21 21:14:52,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:52,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-21 21:14:52,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:14:52,538 INFO L87 Difference]: Start difference. First operand 5524 states and 13448 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:58,392 INFO L93 Difference]: Finished difference Result 18186 states and 40794 transitions. [2021-05-21 21:14:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-05-21 21:14:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:14:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:58,412 INFO L225 Difference]: With dead ends: 18186 [2021-05-21 21:14:58,413 INFO L226 Difference]: Without dead ends: 18072 [2021-05-21 21:14:58,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15389 ImplicationChecksByTransitivity, 4228.6ms TimeCoverageRelationStatistics Valid=5445, Invalid=35967, Unknown=0, NotChecked=0, Total=41412 [2021-05-21 21:14:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18072 states. [2021-05-21 21:14:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18072 to 5412. [2021-05-21 21:14:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.4405839955645905) internal successors, (13206), 5411 states have internal predecessors, (13206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 13206 transitions. [2021-05-21 21:14:58,519 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 13206 transitions. Word has length 55 [2021-05-21 21:14:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:58,519 INFO L482 AbstractCegarLoop]: Abstraction has 5412 states and 13206 transitions. [2021-05-21 21:14:58,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 13206 transitions. [2021-05-21 21:14:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:14:58,523 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:58,523 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:58,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-05-21 21:14:58,723 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:58,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1315992301, now seen corresponding path program 83 times [2021-05-21 21:14:58,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:58,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244297048] [2021-05-21 21:14:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:58,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:58,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244297048] [2021-05-21 21:14:58,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244297048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:58,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484180792] [2021-05-21 21:14:58,934 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 [2021-05-21 21:14:58,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 21:14:58,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:14:58,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484180792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:59,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:59,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 47 [2021-05-21 21:14:59,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710376979] [2021-05-21 21:14:59,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-21 21:14:59,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-21 21:14:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:14:59,486 INFO L87 Difference]: Start difference. First operand 5412 states and 13206 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:03,572 INFO L93 Difference]: Finished difference Result 19113 states and 42468 transitions. [2021-05-21 21:15:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-21 21:15:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:15:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:03,594 INFO L225 Difference]: With dead ends: 19113 [2021-05-21 21:15:03,595 INFO L226 Difference]: Without dead ends: 18873 [2021-05-21 21:15:03,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 3273.6ms TimeCoverageRelationStatistics Valid=4545, Invalid=24867, Unknown=0, NotChecked=0, Total=29412 [2021-05-21 21:15:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2021-05-21 21:15:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 5360. [2021-05-21 21:15:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 2.4448591155066244) internal successors, (13102), 5359 states have internal predecessors, (13102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 13102 transitions. [2021-05-21 21:15:03,707 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 13102 transitions. Word has length 55 [2021-05-21 21:15:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:03,707 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 13102 transitions. [2021-05-21 21:15:03,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 13102 transitions. [2021-05-21 21:15:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:15:03,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:03,710 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:03,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-05-21 21:15:03,912 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash -469019279, now seen corresponding path program 84 times [2021-05-21 21:15:03,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:03,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67642625] [2021-05-21 21:15:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:04,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:04,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67642625] [2021-05-21 21:15:04,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67642625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:04,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974097047] [2021-05-21 21:15:04,164 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 [2021-05-21 21:15:04,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 21:15:04,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:04,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-21 21:15:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:04,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974097047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:04,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:04,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-05-21 21:15:04,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185172237] [2021-05-21 21:15:04,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-21 21:15:04,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-21 21:15:04,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 21:15:04,854 INFO L87 Difference]: Start difference. First operand 5360 states and 13102 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:09,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:09,551 INFO L93 Difference]: Finished difference Result 18758 states and 41177 transitions. [2021-05-21 21:15:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-05-21 21:15:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:15:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:09,569 INFO L225 Difference]: With dead ends: 18758 [2021-05-21 21:15:09,569 INFO L226 Difference]: Without dead ends: 18353 [2021-05-21 21:15:09,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14275 ImplicationChecksByTransitivity, 3994.1ms TimeCoverageRelationStatistics Valid=6292, Invalid=30380, Unknown=0, NotChecked=0, Total=36672 [2021-05-21 21:15:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-05-21 21:15:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5380. [2021-05-21 21:15:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 2.443205056701989) internal successors, (13142), 5379 states have internal predecessors, (13142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 13142 transitions. [2021-05-21 21:15:09,670 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 13142 transitions. Word has length 55 [2021-05-21 21:15:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:09,670 INFO L482 AbstractCegarLoop]: Abstraction has 5380 states and 13142 transitions. [2021-05-21 21:15:09,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 13142 transitions. [2021-05-21 21:15:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:15:09,673 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:09,673 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:09,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-05-21 21:15:09,874 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:09,874 INFO L82 PathProgramCache]: Analyzing trace with hash -897735435, now seen corresponding path program 85 times [2021-05-21 21:15:09,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:09,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105132930] [2021-05-21 21:15:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:10,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:10,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105132930] [2021-05-21 21:15:10,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105132930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:10,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315309422] [2021-05-21 21:15:10,084 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 [2021-05-21 21:15:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:10,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:15:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:10,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315309422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:10,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:10,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-05-21 21:15:10,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866460550] [2021-05-21 21:15:10,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-21 21:15:10,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-21 21:15:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 21:15:10,711 INFO L87 Difference]: Start difference. First operand 5380 states and 13142 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:15,217 INFO L93 Difference]: Finished difference Result 18854 states and 41231 transitions. [2021-05-21 21:15:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-05-21 21:15:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:15:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:15,235 INFO L225 Difference]: With dead ends: 18854 [2021-05-21 21:15:15,235 INFO L226 Difference]: Without dead ends: 18251 [2021-05-21 21:15:15,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 3851.1ms TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-05-21 21:15:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18251 states. [2021-05-21 21:15:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18251 to 5392. [2021-05-21 21:15:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 2.4422185123353737) internal successors, (13166), 5391 states have internal predecessors, (13166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 13166 transitions. [2021-05-21 21:15:15,342 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 13166 transitions. Word has length 55 [2021-05-21 21:15:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:15,342 INFO L482 AbstractCegarLoop]: Abstraction has 5392 states and 13166 transitions. [2021-05-21 21:15:15,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 13166 transitions. [2021-05-21 21:15:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:15:15,346 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:15,346 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:15,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:15,546 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1703861895, now seen corresponding path program 86 times [2021-05-21 21:15:15,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:15,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741261493] [2021-05-21 21:15:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:15,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:15,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741261493] [2021-05-21 21:15:15,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741261493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:15,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684541155] [2021-05-21 21:15:15,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:15:15,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:15:15,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:15,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:15:16,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:16,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684541155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:16,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:16,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-05-21 21:15:16,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326541162] [2021-05-21 21:15:16,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-21 21:15:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-21 21:15:16,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 21:15:16,579 INFO L87 Difference]: Start difference. First operand 5392 states and 13166 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:21,097 INFO L93 Difference]: Finished difference Result 15764 states and 34786 transitions. [2021-05-21 21:15:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-05-21 21:15:21,097 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:15:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:21,110 INFO L225 Difference]: With dead ends: 15764 [2021-05-21 21:15:21,110 INFO L226 Difference]: Without dead ends: 14963 [2021-05-21 21:15:21,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13296 ImplicationChecksByTransitivity, 3979.9ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-05-21 21:15:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14963 states. [2021-05-21 21:15:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14963 to 5551. [2021-05-21 21:15:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 2.4086486486486485) internal successors, (13368), 5550 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 13368 transitions. [2021-05-21 21:15:21,202 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 13368 transitions. Word has length 55 [2021-05-21 21:15:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:21,202 INFO L482 AbstractCegarLoop]: Abstraction has 5551 states and 13368 transitions. [2021-05-21 21:15:21,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 13368 transitions. [2021-05-21 21:15:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:15:21,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:21,205 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:21,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-05-21 21:15:21,406 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:21,406 INFO L82 PathProgramCache]: Analyzing trace with hash 335036743, now seen corresponding path program 87 times [2021-05-21 21:15:21,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:21,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017504590] [2021-05-21 21:15:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:21,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:21,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017504590] [2021-05-21 21:15:21,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017504590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:21,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803089428] [2021-05-21 21:15:21,524 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 [2021-05-21 21:15:21,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 21:15:21,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:15:21,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:22,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803089428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:22,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:22,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-05-21 21:15:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001619716] [2021-05-21 21:15:22,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-21 21:15:22,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-21 21:15:22,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 21:15:22,137 INFO L87 Difference]: Start difference. First operand 5551 states and 13368 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:29,542 INFO L93 Difference]: Finished difference Result 11259 states and 25238 transitions. [2021-05-21 21:15:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-05-21 21:15:29,542 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:15:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:29,551 INFO L225 Difference]: With dead ends: 11259 [2021-05-21 21:15:29,551 INFO L226 Difference]: Without dead ends: 11255 [2021-05-21 21:15:29,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32929 ImplicationChecksByTransitivity, 6726.3ms TimeCoverageRelationStatistics Valid=15649, Invalid=58063, Unknown=0, NotChecked=0, Total=73712 [2021-05-21 21:15:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2021-05-21 21:15:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 5626. [2021-05-21 21:15:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5625 states have (on average 2.4208) internal successors, (13617), 5625 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 13617 transitions. [2021-05-21 21:15:29,637 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 13617 transitions. Word has length 55 [2021-05-21 21:15:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:29,637 INFO L482 AbstractCegarLoop]: Abstraction has 5626 states and 13617 transitions. [2021-05-21 21:15:29,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 13617 transitions. [2021-05-21 21:15:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:15:29,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:29,641 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:29,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-05-21 21:15:29,849 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash 317372549, now seen corresponding path program 88 times [2021-05-21 21:15:29,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:29,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011225931] [2021-05-21 21:15:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:30,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:30,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011225931] [2021-05-21 21:15:30,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011225931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:30,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976690153] [2021-05-21 21:15:30,100 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 [2021-05-21 21:15:30,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:15:30,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:30,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-21 21:15:30,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:30,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976690153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:30,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:30,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-05-21 21:15:30,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097876090] [2021-05-21 21:15:30,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-21 21:15:30,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-21 21:15:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 21:15:30,728 INFO L87 Difference]: Start difference. First operand 5626 states and 13617 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:35,974 INFO L93 Difference]: Finished difference Result 7916 states and 18052 transitions. [2021-05-21 21:15:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-05-21 21:15:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:15:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:35,980 INFO L225 Difference]: With dead ends: 7916 [2021-05-21 21:15:35,980 INFO L226 Difference]: Without dead ends: 7538 [2021-05-21 21:15:35,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18266 ImplicationChecksByTransitivity, 4665.0ms TimeCoverageRelationStatistics Valid=12509, Invalid=34797, Unknown=0, NotChecked=0, Total=47306 [2021-05-21 21:15:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-05-21 21:15:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 5623. [2021-05-21 21:15:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.418000711490573) internal successors, (13594), 5622 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13594 transitions. [2021-05-21 21:15:36,043 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13594 transitions. Word has length 57 [2021-05-21 21:15:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:36,044 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13594 transitions. [2021-05-21 21:15:36,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13594 transitions. [2021-05-21 21:15:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 21:15:36,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:36,048 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:36,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:36,248 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:36,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1117608869, now seen corresponding path program 89 times [2021-05-21 21:15:36,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:36,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488952689] [2021-05-21 21:15:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:36,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:36,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488952689] [2021-05-21 21:15:36,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488952689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:36,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544507983] [2021-05-21 21:15:36,375 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 [2021-05-21 21:15:36,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 21:15:36,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:36,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 21:15:36,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:37,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544507983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:37,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:37,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2021-05-21 21:15:37,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689492590] [2021-05-21 21:15:37,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 21:15:37,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:37,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 21:15:37,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:15:37,001 INFO L87 Difference]: Start difference. First operand 5623 states and 13594 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:45,491 INFO L93 Difference]: Finished difference Result 7450 states and 17196 transitions. [2021-05-21 21:15:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-05-21 21:15:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 21:15:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:45,497 INFO L225 Difference]: With dead ends: 7450 [2021-05-21 21:15:45,497 INFO L226 Difference]: Without dead ends: 7446 [2021-05-21 21:15:45,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46028 ImplicationChecksByTransitivity, 7929.9ms TimeCoverageRelationStatistics Valid=21517, Invalid=78023, Unknown=0, NotChecked=0, Total=99540 [2021-05-21 21:15:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7446 states. [2021-05-21 21:15:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7446 to 5623. [2021-05-21 21:15:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.4178228388473855) internal successors, (13593), 5622 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13593 transitions. [2021-05-21 21:15:45,551 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13593 transitions. Word has length 57 [2021-05-21 21:15:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:45,551 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13593 transitions. [2021-05-21 21:15:45,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13593 transitions. [2021-05-21 21:15:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:15:45,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:45,555 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:45,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:45,762 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash -870344253, now seen corresponding path program 90 times [2021-05-21 21:15:45,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:45,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114641930] [2021-05-21 21:15:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:45,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:45,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114641930] [2021-05-21 21:15:45,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114641930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:45,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172256699] [2021-05-21 21:15:45,877 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 [2021-05-21 21:15:45,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 21:15:45,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:45,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-21 21:15:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:46,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172256699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:46,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:46,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 25 [2021-05-21 21:15:46,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363696978] [2021-05-21 21:15:46,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:15:46,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:46,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:15:46,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:15:46,144 INFO L87 Difference]: Start difference. First operand 5623 states and 13593 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:46,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:46,386 INFO L93 Difference]: Finished difference Result 7171 states and 17073 transitions. [2021-05-21 21:15:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:15:46,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:15:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:46,394 INFO L225 Difference]: With dead ends: 7171 [2021-05-21 21:15:46,394 INFO L226 Difference]: Without dead ends: 7081 [2021-05-21 21:15:46,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:15:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-05-21 21:15:46,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6483. [2021-05-21 21:15:46,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 2.4438444924406046) internal successors, (15841), 6482 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 15841 transitions. [2021-05-21 21:15:46,471 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 15841 transitions. Word has length 59 [2021-05-21 21:15:46,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:46,471 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 15841 transitions. [2021-05-21 21:15:46,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 15841 transitions. [2021-05-21 21:15:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:15:46,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:46,476 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:46,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:46,676 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:46,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1705145369, now seen corresponding path program 91 times [2021-05-21 21:15:46,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:46,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387099837] [2021-05-21 21:15:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:46,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387099837] [2021-05-21 21:15:46,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387099837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330230135] [2021-05-21 21:15:46,895 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 [2021-05-21 21:15:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:46,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-21 21:15:46,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:47,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330230135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:47,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:47,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2021-05-21 21:15:47,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485228386] [2021-05-21 21:15:47,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-21 21:15:47,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:47,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-21 21:15:47,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:15:47,601 INFO L87 Difference]: Start difference. First operand 6483 states and 15841 transitions. Second operand has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:53,542 INFO L93 Difference]: Finished difference Result 12343 states and 28098 transitions. [2021-05-21 21:15:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-21 21:15:53,542 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:15:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:53,552 INFO L225 Difference]: With dead ends: 12343 [2021-05-21 21:15:53,552 INFO L226 Difference]: Without dead ends: 12319 [2021-05-21 21:15:53,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10309 ImplicationChecksByTransitivity, 3862.3ms TimeCoverageRelationStatistics Valid=2449, Invalid=28351, Unknown=0, NotChecked=0, Total=30800 [2021-05-21 21:15:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2021-05-21 21:15:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 6755. [2021-05-21 21:15:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.447290494521765) internal successors, (16529), 6754 states have internal predecessors, (16529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 16529 transitions. [2021-05-21 21:15:53,639 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 16529 transitions. Word has length 59 [2021-05-21 21:15:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:53,639 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 16529 transitions. [2021-05-21 21:15:53,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 16529 transitions. [2021-05-21 21:15:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:15:53,643 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:53,643 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:53,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-05-21 21:15:53,843 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash 974779459, now seen corresponding path program 92 times [2021-05-21 21:15:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:53,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385449300] [2021-05-21 21:15:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:54,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385449300] [2021-05-21 21:15:54,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385449300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143440500] [2021-05-21 21:15:54,028 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 [2021-05-21 21:15:54,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:15:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-21 21:15:54,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:54,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143440500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:54,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:54,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 44 [2021-05-21 21:15:54,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925423629] [2021-05-21 21:15:54,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-21 21:15:54,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-21 21:15:54,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:15:54,787 INFO L87 Difference]: Start difference. First operand 6755 states and 16529 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:59,700 INFO L93 Difference]: Finished difference Result 9269 states and 21605 transitions. [2021-05-21 21:15:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-21 21:15:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:15:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:59,709 INFO L225 Difference]: With dead ends: 9269 [2021-05-21 21:15:59,709 INFO L226 Difference]: Without dead ends: 9265 [2021-05-21 21:15:59,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6382 ImplicationChecksByTransitivity, 3274.9ms TimeCoverageRelationStatistics Valid=1733, Invalid=19147, Unknown=0, NotChecked=0, Total=20880 [2021-05-21 21:15:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-05-21 21:15:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 6473. [2021-05-21 21:15:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6473 states, 6472 states have (on average 2.4456118665018542) internal successors, (15828), 6472 states have internal predecessors, (15828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6473 states to 6473 states and 15828 transitions. [2021-05-21 21:15:59,792 INFO L78 Accepts]: Start accepts. Automaton has 6473 states and 15828 transitions. Word has length 59 [2021-05-21 21:15:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:59,792 INFO L482 AbstractCegarLoop]: Abstraction has 6473 states and 15828 transitions. [2021-05-21 21:15:59,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6473 states and 15828 transitions. [2021-05-21 21:15:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:15:59,796 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:59,796 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:59,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:59,996 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1018344093, now seen corresponding path program 93 times [2021-05-21 21:15:59,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:59,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334769183] [2021-05-21 21:15:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:00,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:00,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334769183] [2021-05-21 21:16:00,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334769183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:00,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616742482] [2021-05-21 21:16:00,201 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 [2021-05-21 21:16:00,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 21:16:00,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-21 21:16:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:00,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616742482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:00,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:00,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-05-21 21:16:00,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395536290] [2021-05-21 21:16:00,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:16:00,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:00,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:16:00,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:16:00,893 INFO L87 Difference]: Start difference. First operand 6473 states and 15828 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:09,350 INFO L93 Difference]: Finished difference Result 14464 states and 32612 transitions. [2021-05-21 21:16:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-05-21 21:16:09,350 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:16:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:09,364 INFO L225 Difference]: With dead ends: 14464 [2021-05-21 21:16:09,365 INFO L226 Difference]: Without dead ends: 14416 [2021-05-21 21:16:09,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17435 ImplicationChecksByTransitivity, 5060.7ms TimeCoverageRelationStatistics Valid=4375, Invalid=43805, Unknown=0, NotChecked=0, Total=48180 [2021-05-21 21:16:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14416 states. [2021-05-21 21:16:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14416 to 6523. [2021-05-21 21:16:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 2.4449555351119288) internal successors, (15946), 6522 states have internal predecessors, (15946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 15946 transitions. [2021-05-21 21:16:09,462 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 15946 transitions. Word has length 59 [2021-05-21 21:16:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:09,462 INFO L482 AbstractCegarLoop]: Abstraction has 6523 states and 15946 transitions. [2021-05-21 21:16:09,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 15946 transitions. [2021-05-21 21:16:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:16:09,466 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:09,466 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:09,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:09,682 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash -194027999, now seen corresponding path program 94 times [2021-05-21 21:16:09,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:09,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970031214] [2021-05-21 21:16:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:10,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:10,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970031214] [2021-05-21 21:16:10,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970031214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:10,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514935208] [2021-05-21 21:16:10,011 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 [2021-05-21 21:16:10,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:16:10,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-21 21:16:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:10,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514935208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:10,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:10,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2021-05-21 21:16:10,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751806581] [2021-05-21 21:16:10,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-21 21:16:10,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-21 21:16:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:16:10,720 INFO L87 Difference]: Start difference. First operand 6523 states and 15946 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:18,570 INFO L93 Difference]: Finished difference Result 17210 states and 38597 transitions. [2021-05-21 21:16:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-05-21 21:16:18,570 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:16:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:18,589 INFO L225 Difference]: With dead ends: 17210 [2021-05-21 21:16:18,589 INFO L226 Difference]: Without dead ends: 17132 [2021-05-21 21:16:18,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22220 ImplicationChecksByTransitivity, 5673.0ms TimeCoverageRelationStatistics Valid=6045, Invalid=53247, Unknown=0, NotChecked=0, Total=59292 [2021-05-21 21:16:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2021-05-21 21:16:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 6424. [2021-05-21 21:16:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6424 states, 6423 states have (on average 2.4406040790907677) internal successors, (15676), 6423 states have internal predecessors, (15676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 15676 transitions. [2021-05-21 21:16:18,727 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 15676 transitions. Word has length 59 [2021-05-21 21:16:18,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:18,727 INFO L482 AbstractCegarLoop]: Abstraction has 6424 states and 15676 transitions. [2021-05-21 21:16:18,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 15676 transitions. [2021-05-21 21:16:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:16:18,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:18,731 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:18,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:18,932 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1178744485, now seen corresponding path program 95 times [2021-05-21 21:16:18,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:18,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605535762] [2021-05-21 21:16:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:19,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:19,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605535762] [2021-05-21 21:16:19,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605535762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:19,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574123410] [2021-05-21 21:16:19,135 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 [2021-05-21 21:16:19,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 21:16:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-21 21:16:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:19,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574123410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:19,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:19,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 49 [2021-05-21 21:16:19,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265473733] [2021-05-21 21:16:19,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-21 21:16:19,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:19,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-21 21:16:19,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 21:16:19,804 INFO L87 Difference]: Start difference. First operand 6424 states and 15676 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:27,365 INFO L93 Difference]: Finished difference Result 19569 states and 43599 transitions. [2021-05-21 21:16:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-05-21 21:16:27,365 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:16:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:27,385 INFO L225 Difference]: With dead ends: 19569 [2021-05-21 21:16:27,385 INFO L226 Difference]: Without dead ends: 19455 [2021-05-21 21:16:27,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22978 ImplicationChecksByTransitivity, 5436.2ms TimeCoverageRelationStatistics Valid=7134, Invalid=52646, Unknown=0, NotChecked=0, Total=59780 [2021-05-21 21:16:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19455 states. [2021-05-21 21:16:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19455 to 6298. [2021-05-21 21:16:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6298 states, 6297 states have (on average 2.4427505161187866) internal successors, (15382), 6297 states have internal predecessors, (15382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 15382 transitions. [2021-05-21 21:16:27,503 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 15382 transitions. Word has length 59 [2021-05-21 21:16:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:27,503 INFO L482 AbstractCegarLoop]: Abstraction has 6298 states and 15382 transitions. [2021-05-21 21:16:27,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 15382 transitions. [2021-05-21 21:16:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:16:27,507 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:27,507 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:27,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:27,708 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:27,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1738865705, now seen corresponding path program 96 times [2021-05-21 21:16:27,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:27,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139014580] [2021-05-21 21:16:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:27,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139014580] [2021-05-21 21:16:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139014580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344995589] [2021-05-21 21:16:27,937 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 [2021-05-21 21:16:27,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 21:16:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:28,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344995589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:28,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:28,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2021-05-21 21:16:28,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859430480] [2021-05-21 21:16:28,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:16:28,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:28,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:16:28,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:16:28,626 INFO L87 Difference]: Start difference. First operand 6298 states and 15382 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:34,355 INFO L93 Difference]: Finished difference Result 22986 states and 51049 transitions. [2021-05-21 21:16:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-05-21 21:16:34,355 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:16:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:34,378 INFO L225 Difference]: With dead ends: 22986 [2021-05-21 21:16:34,378 INFO L226 Difference]: Without dead ends: 22683 [2021-05-21 21:16:34,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17310 ImplicationChecksByTransitivity, 4409.7ms TimeCoverageRelationStatistics Valid=6385, Invalid=38771, Unknown=0, NotChecked=0, Total=45156 [2021-05-21 21:16:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22683 states. [2021-05-21 21:16:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22683 to 5441. [2021-05-21 21:16:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 2.4193014705882354) internal successors, (13161), 5440 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 13161 transitions. [2021-05-21 21:16:34,493 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 13161 transitions. Word has length 59 [2021-05-21 21:16:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:34,493 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 13161 transitions. [2021-05-21 21:16:34,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 13161 transitions. [2021-05-21 21:16:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:16:34,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:34,497 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:34,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-05-21 21:16:34,697 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:34,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2044629331, now seen corresponding path program 97 times [2021-05-21 21:16:34,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:34,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449525467] [2021-05-21 21:16:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:34,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:34,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449525467] [2021-05-21 21:16:34,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449525467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:34,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098961326] [2021-05-21 21:16:34,915 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 [2021-05-21 21:16:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-21 21:16:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:35,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098961326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:35,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:35,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-05-21 21:16:35,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756516268] [2021-05-21 21:16:35,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:16:35,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:16:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:16:35,557 INFO L87 Difference]: Start difference. First operand 5441 states and 13161 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:40,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:40,308 INFO L93 Difference]: Finished difference Result 22758 states and 49665 transitions. [2021-05-21 21:16:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-05-21 21:16:40,308 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:16:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:40,329 INFO L225 Difference]: With dead ends: 22758 [2021-05-21 21:16:40,329 INFO L226 Difference]: Without dead ends: 22332 [2021-05-21 21:16:40,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14328 ImplicationChecksByTransitivity, 3823.4ms TimeCoverageRelationStatistics Valid=5883, Invalid=32337, Unknown=0, NotChecked=0, Total=38220 [2021-05-21 21:16:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2021-05-21 21:16:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 5465. [2021-05-21 21:16:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 5464 states have (on average 2.417459736456808) internal successors, (13209), 5464 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 13209 transitions. [2021-05-21 21:16:40,442 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 13209 transitions. Word has length 59 [2021-05-21 21:16:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:40,442 INFO L482 AbstractCegarLoop]: Abstraction has 5465 states and 13209 transitions. [2021-05-21 21:16:40,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 13209 transitions. [2021-05-21 21:16:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:16:40,446 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:40,446 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:40,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:40,646 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1129401905, now seen corresponding path program 98 times [2021-05-21 21:16:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:40,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043884253] [2021-05-21 21:16:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:40,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:40,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043884253] [2021-05-21 21:16:40,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043884253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:40,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634386277] [2021-05-21 21:16:40,887 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 [2021-05-21 21:16:40,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:16:40,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-21 21:16:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:41,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634386277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:41,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:41,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2021-05-21 21:16:41,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775244375] [2021-05-21 21:16:41,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-21 21:16:41,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:41,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-21 21:16:41,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 21:16:41,538 INFO L87 Difference]: Start difference. First operand 5465 states and 13209 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:46,670 INFO L93 Difference]: Finished difference Result 22040 states and 47868 transitions. [2021-05-21 21:16:46,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-05-21 21:16:46,670 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:16:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:46,691 INFO L225 Difference]: With dead ends: 22040 [2021-05-21 21:16:46,691 INFO L226 Difference]: Without dead ends: 21506 [2021-05-21 21:16:46,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19899 ImplicationChecksByTransitivity, 4431.7ms TimeCoverageRelationStatistics Valid=8757, Invalid=41195, Unknown=0, NotChecked=0, Total=49952 [2021-05-21 21:16:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21506 states. [2021-05-21 21:16:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21506 to 5481. [2021-05-21 21:16:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 2.4162408759124085) internal successors, (13241), 5480 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 13241 transitions. [2021-05-21 21:16:46,807 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 13241 transitions. Word has length 59 [2021-05-21 21:16:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:46,807 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 13241 transitions. [2021-05-21 21:16:46,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 13241 transitions. [2021-05-21 21:16:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:16:46,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:46,810 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:47,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:47,010 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:47,010 INFO L82 PathProgramCache]: Analyzing trace with hash 819878581, now seen corresponding path program 99 times [2021-05-21 21:16:47,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:47,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568151670] [2021-05-21 21:16:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:47,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:47,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568151670] [2021-05-21 21:16:47,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568151670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:47,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277290543] [2021-05-21 21:16:47,243 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 [2021-05-21 21:16:47,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 21:16:47,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:16:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:47,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277290543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:47,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:47,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2021-05-21 21:16:47,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229554605] [2021-05-21 21:16:47,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-21 21:16:47,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:47,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-21 21:16:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:16:47,945 INFO L87 Difference]: Start difference. First operand 5481 states and 13241 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:53,587 INFO L93 Difference]: Finished difference Result 19025 states and 40337 transitions. [2021-05-21 21:16:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-05-21 21:16:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:16:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:53,604 INFO L225 Difference]: With dead ends: 19025 [2021-05-21 21:16:53,604 INFO L226 Difference]: Without dead ends: 18353 [2021-05-21 21:16:53,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23147 ImplicationChecksByTransitivity, 4872.7ms TimeCoverageRelationStatistics Valid=11132, Invalid=46228, Unknown=0, NotChecked=0, Total=57360 [2021-05-21 21:16:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-05-21 21:16:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5493. [2021-05-21 21:16:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.415331391114348) internal successors, (13265), 5492 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 13265 transitions. [2021-05-21 21:16:53,703 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 13265 transitions. Word has length 59 [2021-05-21 21:16:53,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:53,703 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 13265 transitions. [2021-05-21 21:16:53,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 13265 transitions. [2021-05-21 21:16:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:16:53,707 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:53,707 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:53,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-05-21 21:16:53,907 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1283609657, now seen corresponding path program 100 times [2021-05-21 21:16:53,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:53,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632545913] [2021-05-21 21:16:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:54,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:54,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632545913] [2021-05-21 21:16:54,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632545913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:54,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826715935] [2021-05-21 21:16:54,187 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 [2021-05-21 21:16:54,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:16:54,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:54,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-21 21:16:54,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826715935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:54,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:54,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-05-21 21:16:54,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830023324] [2021-05-21 21:16:54,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-21 21:16:54,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:54,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-21 21:16:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:16:54,834 INFO L87 Difference]: Start difference. First operand 5493 states and 13265 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:00,067 INFO L93 Difference]: Finished difference Result 17796 states and 38889 transitions. [2021-05-21 21:17:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-05-21 21:17:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:17:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:00,082 INFO L225 Difference]: With dead ends: 17796 [2021-05-21 21:17:00,083 INFO L226 Difference]: Without dead ends: 16833 [2021-05-21 21:17:00,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18178 ImplicationChecksByTransitivity, 4710.8ms TimeCoverageRelationStatistics Valid=10369, Invalid=38693, Unknown=0, NotChecked=0, Total=49062 [2021-05-21 21:17:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16833 states. [2021-05-21 21:17:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16833 to 5659. [2021-05-21 21:17:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.376458112407211) internal successors, (13446), 5658 states have internal predecessors, (13446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 13446 transitions. [2021-05-21 21:17:00,182 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 13446 transitions. Word has length 59 [2021-05-21 21:17:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:00,182 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 13446 transitions. [2021-05-21 21:17:00,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 13446 transitions. [2021-05-21 21:17:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-21 21:17:00,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:00,185 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:00,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-05-21 21:17:00,386 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:00,386 INFO L82 PathProgramCache]: Analyzing trace with hash -994946229, now seen corresponding path program 101 times [2021-05-21 21:17:00,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:00,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116633212] [2021-05-21 21:17:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:00,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:00,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116633212] [2021-05-21 21:17:00,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116633212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:00,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667097936] [2021-05-21 21:17:00,510 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 [2021-05-21 21:17:00,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 21:17:00,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:00,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:17:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:01,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667097936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:01,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:01,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-05-21 21:17:01,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903643967] [2021-05-21 21:17:01,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-21 21:17:01,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-21 21:17:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 21:17:01,161 INFO L87 Difference]: Start difference. First operand 5659 states and 13446 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:09,789 INFO L93 Difference]: Finished difference Result 12575 states and 27866 transitions. [2021-05-21 21:17:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-05-21 21:17:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-21 21:17:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:09,798 INFO L225 Difference]: With dead ends: 12575 [2021-05-21 21:17:09,798 INFO L226 Difference]: Without dead ends: 12571 [2021-05-21 21:17:09,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46972 ImplicationChecksByTransitivity, 7875.4ms TimeCoverageRelationStatistics Valid=21531, Invalid=80549, Unknown=0, NotChecked=0, Total=102080 [2021-05-21 21:17:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12571 states. [2021-05-21 21:17:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12571 to 5767. [2021-05-21 21:17:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 2.392126257370794) internal successors, (13793), 5766 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 13793 transitions. [2021-05-21 21:17:09,869 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 13793 transitions. Word has length 59 [2021-05-21 21:17:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:09,869 INFO L482 AbstractCegarLoop]: Abstraction has 5767 states and 13793 transitions. [2021-05-21 21:17:09,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 13793 transitions. [2021-05-21 21:17:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-21 21:17:09,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:09,873 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:10,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:10,074 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:10,074 INFO L82 PathProgramCache]: Analyzing trace with hash -192628671, now seen corresponding path program 102 times [2021-05-21 21:17:10,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:10,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117580493] [2021-05-21 21:17:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:10,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117580493] [2021-05-21 21:17:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117580493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600657411] [2021-05-21 21:17:10,344 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 [2021-05-21 21:17:10,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 21:17:10,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:17:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:11,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600657411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:11,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:11,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-05-21 21:17:11,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969991298] [2021-05-21 21:17:11,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-21 21:17:11,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:11,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-21 21:17:11,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2528, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 21:17:11,104 INFO L87 Difference]: Start difference. First operand 5767 states and 13793 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:17,122 INFO L93 Difference]: Finished difference Result 8440 states and 18980 transitions. [2021-05-21 21:17:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-05-21 21:17:17,122 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-05-21 21:17:17,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:17,129 INFO L225 Difference]: With dead ends: 8440 [2021-05-21 21:17:17,129 INFO L226 Difference]: Without dead ends: 7990 [2021-05-21 21:17:17,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24730 ImplicationChecksByTransitivity, 5448.7ms TimeCoverageRelationStatistics Valid=16440, Invalid=45312, Unknown=0, NotChecked=0, Total=61752 [2021-05-21 21:17:17,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-05-21 21:17:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 5762. [2021-05-21 21:17:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 2.389168547127235) internal successors, (13764), 5761 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 13764 transitions. [2021-05-21 21:17:17,186 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 13764 transitions. Word has length 61 [2021-05-21 21:17:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:17,186 INFO L482 AbstractCegarLoop]: Abstraction has 5762 states and 13764 transitions. [2021-05-21 21:17:17,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 13764 transitions. [2021-05-21 21:17:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-21 21:17:17,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:17,189 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:17,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:17,390 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:17,390 INFO L82 PathProgramCache]: Analyzing trace with hash 559420251, now seen corresponding path program 103 times [2021-05-21 21:17:17,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:17,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379430132] [2021-05-21 21:17:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:17,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:17,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379430132] [2021-05-21 21:17:17,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379430132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:17,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061338376] [2021-05-21 21:17:17,520 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 [2021-05-21 21:17:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:17:17,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:18,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061338376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:18,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:18,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28] total 42 [2021-05-21 21:17:18,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006181105] [2021-05-21 21:17:18,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:18,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:18,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:18,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:18,149 INFO L87 Difference]: Start difference. First operand 5762 states and 13764 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:23,588 INFO L93 Difference]: Finished difference Result 7544 states and 17272 transitions. [2021-05-21 21:17:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-05-21 21:17:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-05-21 21:17:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:23,594 INFO L225 Difference]: With dead ends: 7544 [2021-05-21 21:17:23,594 INFO L226 Difference]: Without dead ends: 7540 [2021-05-21 21:17:23,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23464 ImplicationChecksByTransitivity, 5172.5ms TimeCoverageRelationStatistics Valid=12941, Invalid=42519, Unknown=0, NotChecked=0, Total=55460 [2021-05-21 21:17:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2021-05-21 21:17:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 5718. [2021-05-21 21:17:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.391988805317474) internal successors, (13675), 5717 states have internal predecessors, (13675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 13675 transitions. [2021-05-21 21:17:23,644 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 13675 transitions. Word has length 61 [2021-05-21 21:17:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:23,645 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 13675 transitions. [2021-05-21 21:17:23,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 13675 transitions. [2021-05-21 21:17:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-21 21:17:23,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:23,648 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:23,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-05-21 21:17:23,849 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1867745943, now seen corresponding path program 104 times [2021-05-21 21:17:23,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:23,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556692797] [2021-05-21 21:17:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:17:23,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:23,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556692797] [2021-05-21 21:17:23,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556692797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:23,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173174864] [2021-05-21 21:17:23,983 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 [2021-05-21 21:17:24,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:17:24,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:24,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-21 21:17:24,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:24,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173174864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:24,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:24,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-05-21 21:17:24,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247635174] [2021-05-21 21:17:24,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-21 21:17:24,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:24,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-21 21:17:24,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 21:17:24,600 INFO L87 Difference]: Start difference. First operand 5718 states and 13675 transitions. Second operand has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:27,633 INFO L93 Difference]: Finished difference Result 12090 states and 27556 transitions. [2021-05-21 21:17:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:17:27,634 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-05-21 21:17:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:27,645 INFO L225 Difference]: With dead ends: 12090 [2021-05-21 21:17:27,645 INFO L226 Difference]: Without dead ends: 12081 [2021-05-21 21:17:27,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5212 ImplicationChecksByTransitivity, 2474.2ms TimeCoverageRelationStatistics Valid=2862, Invalid=14694, Unknown=0, NotChecked=0, Total=17556 [2021-05-21 21:17:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2021-05-21 21:17:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 7235. [2021-05-21 21:17:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 2.380702239424938) internal successors, (17222), 7234 states have internal predecessors, (17222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 17222 transitions. [2021-05-21 21:17:27,737 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 17222 transitions. Word has length 61 [2021-05-21 21:17:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:27,737 INFO L482 AbstractCegarLoop]: Abstraction has 7235 states and 17222 transitions. [2021-05-21 21:17:27,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 17222 transitions. [2021-05-21 21:17:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:17:27,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:27,743 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:27,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-05-21 21:17:27,943 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1355244929, now seen corresponding path program 105 times [2021-05-21 21:17:27,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:27,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271283829] [2021-05-21 21:17:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:28,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:28,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271283829] [2021-05-21 21:17:28,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271283829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:28,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144877449] [2021-05-21 21:17:28,090 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 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 [2021-05-21 21:17:28,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 21:17:28,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:17:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 25 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:28,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144877449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:28,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:28,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 23 [2021-05-21 21:17:28,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857961772] [2021-05-21 21:17:28,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:17:28,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:28,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:17:28,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:17:28,310 INFO L87 Difference]: Start difference. First operand 7235 states and 17222 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) [2021-05-21 21:17:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:28,627 INFO L93 Difference]: Finished difference Result 9195 states and 21714 transitions. [2021-05-21 21:17:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:17:28,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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 63 [2021-05-21 21:17:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:28,637 INFO L225 Difference]: With dead ends: 9195 [2021-05-21 21:17:28,637 INFO L226 Difference]: Without dead ends: 9102 [2021-05-21 21:17:28,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:17:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9102 states. [2021-05-21 21:17:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9102 to 8338. [2021-05-21 21:17:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 2.408900083963056) internal successors, (20083), 8337 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 20083 transitions. [2021-05-21 21:17:28,730 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 20083 transitions. Word has length 63 [2021-05-21 21:17:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:28,730 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 20083 transitions. [2021-05-21 21:17:28,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) [2021-05-21 21:17:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 20083 transitions. [2021-05-21 21:17:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:17:28,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:28,736 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:28,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:28,949 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2045530241, now seen corresponding path program 106 times [2021-05-21 21:17:28,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:28,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559592824] [2021-05-21 21:17:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:29,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:29,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559592824] [2021-05-21 21:17:29,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559592824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:29,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824793185] [2021-05-21 21:17:29,152 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 [2021-05-21 21:17:29,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:17:29,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-21 21:17:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:29,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824793185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:29,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:29,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30] total 47 [2021-05-21 21:17:29,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190751799] [2021-05-21 21:17:29,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-21 21:17:29,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:29,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-21 21:17:29,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:17:29,981 INFO L87 Difference]: Start difference. First operand 8338 states and 20083 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:36,759 INFO L93 Difference]: Finished difference Result 11486 states and 26531 transitions. [2021-05-21 21:17:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-21 21:17:36,759 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:17:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:36,772 INFO L225 Difference]: With dead ends: 11486 [2021-05-21 21:17:36,773 INFO L226 Difference]: Without dead ends: 11482 [2021-05-21 21:17:36,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8732 ImplicationChecksByTransitivity, 3964.1ms TimeCoverageRelationStatistics Valid=2129, Invalid=25593, Unknown=0, NotChecked=0, Total=27722 [2021-05-21 21:17:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-05-21 21:17:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 8616. [2021-05-21 21:17:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8616 states, 8615 states have (on average 2.4174114915844456) internal successors, (20826), 8615 states have internal predecessors, (20826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8616 states to 8616 states and 20826 transitions. [2021-05-21 21:17:36,865 INFO L78 Accepts]: Start accepts. Automaton has 8616 states and 20826 transitions. Word has length 63 [2021-05-21 21:17:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:36,865 INFO L482 AbstractCegarLoop]: Abstraction has 8616 states and 20826 transitions. [2021-05-21 21:17:36,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 8616 states and 20826 transitions. [2021-05-21 21:17:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:17:36,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:36,871 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:37,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:37,072 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:37,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2113535449, now seen corresponding path program 107 times [2021-05-21 21:17:37,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:37,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630439714] [2021-05-21 21:17:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:37,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:37,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630439714] [2021-05-21 21:17:37,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630439714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:37,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560534948] [2021-05-21 21:17:37,314 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 [2021-05-21 21:17:37,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 21:17:37,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-21 21:17:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:38,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560534948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:38,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:38,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 50 [2021-05-21 21:17:38,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876901520] [2021-05-21 21:17:38,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:17:38,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:17:38,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:17:38,138 INFO L87 Difference]: Start difference. First operand 8616 states and 20826 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:47,554 INFO L93 Difference]: Finished difference Result 18453 states and 41420 transitions. [2021-05-21 21:17:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-05-21 21:17:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:17:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:47,569 INFO L225 Difference]: With dead ends: 18453 [2021-05-21 21:17:47,569 INFO L226 Difference]: Without dead ends: 18405 [2021-05-21 21:17:47,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22263 ImplicationChecksByTransitivity, 5881.7ms TimeCoverageRelationStatistics Valid=5109, Invalid=55161, Unknown=0, NotChecked=0, Total=60270 [2021-05-21 21:17:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-05-21 21:17:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 8296. [2021-05-21 21:17:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8296 states, 8295 states have (on average 2.4176009644364074) internal successors, (20054), 8295 states have internal predecessors, (20054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8296 states to 8296 states and 20054 transitions. [2021-05-21 21:17:47,684 INFO L78 Accepts]: Start accepts. Automaton has 8296 states and 20054 transitions. Word has length 63 [2021-05-21 21:17:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:47,685 INFO L482 AbstractCegarLoop]: Abstraction has 8296 states and 20054 transitions. [2021-05-21 21:17:47,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 8296 states and 20054 transitions. [2021-05-21 21:17:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:17:47,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:47,691 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:47,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-05-21 21:17:47,891 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash 232798557, now seen corresponding path program 108 times [2021-05-21 21:17:47,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:47,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929957112] [2021-05-21 21:17:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:48,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:48,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929957112] [2021-05-21 21:17:48,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929957112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:48,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44027246] [2021-05-21 21:17:48,115 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 [2021-05-21 21:17:48,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 21:17:48,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:48,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-21 21:17:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:48,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44027246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:48,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:48,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2021-05-21 21:17:48,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468697741] [2021-05-21 21:17:48,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:17:48,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:17:48,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2297, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:17:48,884 INFO L87 Difference]: Start difference. First operand 8296 states and 20054 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:58,575 INFO L93 Difference]: Finished difference Result 20814 states and 46375 transitions. [2021-05-21 21:17:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-05-21 21:17:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:17:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:58,622 INFO L225 Difference]: With dead ends: 20814 [2021-05-21 21:17:58,622 INFO L226 Difference]: Without dead ends: 20736 [2021-05-21 21:17:58,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28610 ImplicationChecksByTransitivity, 6762.5ms TimeCoverageRelationStatistics Valid=6992, Invalid=68358, Unknown=0, NotChecked=0, Total=75350 [2021-05-21 21:17:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20736 states. [2021-05-21 21:17:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20736 to 8280. [2021-05-21 21:17:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 2.4179248701534) internal successors, (20018), 8279 states have internal predecessors, (20018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 20018 transitions. [2021-05-21 21:17:58,743 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 20018 transitions. Word has length 63 [2021-05-21 21:17:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:58,743 INFO L482 AbstractCegarLoop]: Abstraction has 8280 states and 20018 transitions. [2021-05-21 21:17:58,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 20018 transitions. [2021-05-21 21:17:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:17:58,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:58,749 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:58,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:58,954 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:58,955 INFO L82 PathProgramCache]: Analyzing trace with hash -742874655, now seen corresponding path program 109 times [2021-05-21 21:17:58,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:58,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731943060] [2021-05-21 21:17:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:59,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:59,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731943060] [2021-05-21 21:17:59,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731943060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:59,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743369671] [2021-05-21 21:17:59,183 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 [2021-05-21 21:17:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-21 21:17:59,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:59,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743369671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:59,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:59,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 51 [2021-05-21 21:17:59,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759105759] [2021-05-21 21:17:59,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-21 21:17:59,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:59,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-21 21:17:59,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 21:17:59,925 INFO L87 Difference]: Start difference. First operand 8280 states and 20018 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:09,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:09,098 INFO L93 Difference]: Finished difference Result 23395 states and 51906 transitions. [2021-05-21 21:18:09,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2021-05-21 21:18:09,098 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:18:09,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:09,119 INFO L225 Difference]: With dead ends: 23395 [2021-05-21 21:18:09,119 INFO L226 Difference]: Without dead ends: 23281 [2021-05-21 21:18:09,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31036 ImplicationChecksByTransitivity, 6770.1ms TimeCoverageRelationStatistics Valid=8486, Invalid=71886, Unknown=0, NotChecked=0, Total=80372 [2021-05-21 21:18:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23281 states. [2021-05-21 21:18:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23281 to 8204. [2021-05-21 21:18:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 2.4183835182250397) internal successors, (19838), 8203 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 19838 transitions. [2021-05-21 21:18:09,254 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 19838 transitions. Word has length 63 [2021-05-21 21:18:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:09,254 INFO L482 AbstractCegarLoop]: Abstraction has 8204 states and 19838 transitions. [2021-05-21 21:18:09,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 19838 transitions. [2021-05-21 21:18:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:18:09,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:09,260 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:09,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-05-21 21:18:09,460 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2113730405, now seen corresponding path program 110 times [2021-05-21 21:18:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:09,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365152879] [2021-05-21 21:18:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:09,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:09,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365152879] [2021-05-21 21:18:09,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365152879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:09,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597703385] [2021-05-21 21:18:09,726 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 [2021-05-21 21:18:09,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:18:09,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:18:09,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:10,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597703385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:10,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:10,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 52 [2021-05-21 21:18:10,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097456816] [2021-05-21 21:18:10,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-21 21:18:10,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:10,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-21 21:18:10,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 21:18:10,429 INFO L87 Difference]: Start difference. First operand 8204 states and 19838 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:18,753 INFO L93 Difference]: Finished difference Result 26465 states and 58445 transitions. [2021-05-21 21:18:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-05-21 21:18:18,753 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:18:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:18,779 INFO L225 Difference]: With dead ends: 26465 [2021-05-21 21:18:18,779 INFO L226 Difference]: Without dead ends: 26309 [2021-05-21 21:18:18,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26772 ImplicationChecksByTransitivity, 5625.3ms TimeCoverageRelationStatistics Valid=8589, Invalid=60843, Unknown=0, NotChecked=0, Total=69432 [2021-05-21 21:18:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26309 states. [2021-05-21 21:18:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26309 to 8152. [2021-05-21 21:18:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8151 states have (on average 2.4210526315789473) internal successors, (19734), 8151 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 19734 transitions. [2021-05-21 21:18:18,928 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 19734 transitions. Word has length 63 [2021-05-21 21:18:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:18,928 INFO L482 AbstractCegarLoop]: Abstraction has 8152 states and 19734 transitions. [2021-05-21 21:18:18,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 19734 transitions. [2021-05-21 21:18:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:18:18,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:18,934 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:19,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:19,135 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:19,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1932982761, now seen corresponding path program 111 times [2021-05-21 21:18:19,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:19,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850688930] [2021-05-21 21:18:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:19,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:19,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850688930] [2021-05-21 21:18:19,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850688930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:19,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603206480] [2021-05-21 21:18:19,372 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 [2021-05-21 21:18:19,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 21:18:19,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:19,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:18:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603206480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:20,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:20,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 53 [2021-05-21 21:18:20,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608065975] [2021-05-21 21:18:20,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-21 21:18:20,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-21 21:18:20,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:18:20,102 INFO L87 Difference]: Start difference. First operand 8152 states and 19734 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:25,588 INFO L93 Difference]: Finished difference Result 29047 states and 63963 transitions. [2021-05-21 21:18:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-05-21 21:18:25,589 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:18:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:25,618 INFO L225 Difference]: With dead ends: 29047 [2021-05-21 21:18:25,618 INFO L226 Difference]: Without dead ends: 28687 [2021-05-21 21:18:25,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16150 ImplicationChecksByTransitivity, 4308.2ms TimeCoverageRelationStatistics Valid=6194, Invalid=36862, Unknown=0, NotChecked=0, Total=43056 [2021-05-21 21:18:25,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2021-05-21 21:18:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 8192. [2021-05-21 21:18:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8191 states have (on average 2.418996459528751) internal successors, (19814), 8191 states have internal predecessors, (19814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 19814 transitions. [2021-05-21 21:18:25,780 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 19814 transitions. Word has length 63 [2021-05-21 21:18:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:25,780 INFO L482 AbstractCegarLoop]: Abstraction has 8192 states and 19814 transitions. [2021-05-21 21:18:25,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 19814 transitions. [2021-05-21 21:18:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:18:25,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:25,786 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:25,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-05-21 21:18:25,987 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1308649837, now seen corresponding path program 112 times [2021-05-21 21:18:25,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:25,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170688224] [2021-05-21 21:18:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:26,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:26,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170688224] [2021-05-21 21:18:26,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170688224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:26,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566345954] [2021-05-21 21:18:26,235 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 [2021-05-21 21:18:26,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:18:26,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:26,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-21 21:18:26,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:27,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566345954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:27,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:27,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2021-05-21 21:18:27,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140765224] [2021-05-21 21:18:27,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-21 21:18:27,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:27,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-21 21:18:27,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 21:18:27,002 INFO L87 Difference]: Start difference. First operand 8192 states and 19814 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:32,513 INFO L93 Difference]: Finished difference Result 29747 states and 65287 transitions. [2021-05-21 21:18:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-05-21 21:18:32,513 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:18:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:32,543 INFO L225 Difference]: With dead ends: 29747 [2021-05-21 21:18:32,543 INFO L226 Difference]: Without dead ends: 29174 [2021-05-21 21:18:32,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19920 ImplicationChecksByTransitivity, 4708.2ms TimeCoverageRelationStatistics Valid=8171, Invalid=43585, Unknown=0, NotChecked=0, Total=51756 [2021-05-21 21:18:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29174 states. [2021-05-21 21:18:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29174 to 8224. [2021-05-21 21:18:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8224 states, 8223 states have (on average 2.417365924844947) internal successors, (19878), 8223 states have internal predecessors, (19878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8224 states to 8224 states and 19878 transitions. [2021-05-21 21:18:32,708 INFO L78 Accepts]: Start accepts. Automaton has 8224 states and 19878 transitions. Word has length 63 [2021-05-21 21:18:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:32,708 INFO L482 AbstractCegarLoop]: Abstraction has 8224 states and 19878 transitions. [2021-05-21 21:18:32,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8224 states and 19878 transitions. [2021-05-21 21:18:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:18:32,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:32,714 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:32,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-05-21 21:18:32,917 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:32,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1493370353, now seen corresponding path program 113 times [2021-05-21 21:18:32,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:32,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215983300] [2021-05-21 21:18:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:33,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:33,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215983300] [2021-05-21 21:18:33,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215983300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:33,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962210422] [2021-05-21 21:18:33,174 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 [2021-05-21 21:18:33,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 21:18:33,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:33,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-21 21:18:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:33,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962210422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:33,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:33,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2021-05-21 21:18:33,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141495184] [2021-05-21 21:18:33,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-21 21:18:33,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-21 21:18:33,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:18:33,933 INFO L87 Difference]: Start difference. First operand 8224 states and 19878 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:40,786 INFO L93 Difference]: Finished difference Result 28419 states and 62099 transitions. [2021-05-21 21:18:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-05-21 21:18:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:18:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:40,812 INFO L225 Difference]: With dead ends: 28419 [2021-05-21 21:18:40,813 INFO L226 Difference]: Without dead ends: 27744 [2021-05-21 21:18:40,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26898 ImplicationChecksByTransitivity, 5595.1ms TimeCoverageRelationStatistics Valid=11861, Invalid=54445, Unknown=0, NotChecked=0, Total=66306 [2021-05-21 21:18:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2021-05-21 21:18:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 8248. [2021-05-21 21:18:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8248 states, 8247 states have (on average 2.4161513277555473) internal successors, (19926), 8247 states have internal predecessors, (19926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8248 states to 8248 states and 19926 transitions. [2021-05-21 21:18:40,966 INFO L78 Accepts]: Start accepts. Automaton has 8248 states and 19926 transitions. Word has length 63 [2021-05-21 21:18:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:40,966 INFO L482 AbstractCegarLoop]: Abstraction has 8248 states and 19926 transitions. [2021-05-21 21:18:40,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8248 states and 19926 transitions. [2021-05-21 21:18:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:18:40,971 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:40,972 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:41,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:41,172 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash 184061813, now seen corresponding path program 114 times [2021-05-21 21:18:41,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:41,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848154800] [2021-05-21 21:18:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:41,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:41,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848154800] [2021-05-21 21:18:41,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848154800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:41,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953861614] [2021-05-21 21:18:41,444 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 [2021-05-21 21:18:41,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 21:18:41,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:41,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:18:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:42,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953861614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:42,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:42,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-05-21 21:18:42,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438012356] [2021-05-21 21:18:42,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-21 21:18:42,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-21 21:18:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2768, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:18:42,204 INFO L87 Difference]: Start difference. First operand 8248 states and 19926 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:48,395 INFO L93 Difference]: Finished difference Result 27835 states and 60645 transitions. [2021-05-21 21:18:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-05-21 21:18:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:18:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:48,423 INFO L225 Difference]: With dead ends: 27835 [2021-05-21 21:18:48,423 INFO L226 Difference]: Without dead ends: 26926 [2021-05-21 21:18:48,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 5374.7ms TimeCoverageRelationStatistics Valid=12784, Invalid=52496, Unknown=0, NotChecked=0, Total=65280 [2021-05-21 21:18:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-05-21 21:18:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 8264. [2021-05-21 21:18:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8264 states, 8263 states have (on average 2.4153455161563597) internal successors, (19958), 8263 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8264 states to 8264 states and 19958 transitions. [2021-05-21 21:18:48,597 INFO L78 Accepts]: Start accepts. Automaton has 8264 states and 19958 transitions. Word has length 63 [2021-05-21 21:18:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:48,597 INFO L482 AbstractCegarLoop]: Abstraction has 8264 states and 19958 transitions. [2021-05-21 21:18:48,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8264 states and 19958 transitions. [2021-05-21 21:18:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:18:48,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:48,602 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:48,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:48,803 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2102737415, now seen corresponding path program 115 times [2021-05-21 21:18:48,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:48,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166148562] [2021-05-21 21:18:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:49,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166148562] [2021-05-21 21:18:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166148562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828440754] [2021-05-21 21:18:49,094 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 [2021-05-21 21:18:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:49,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:18:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:49,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828440754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:49,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:49,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-05-21 21:18:49,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112035708] [2021-05-21 21:18:49,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-21 21:18:49,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:49,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-21 21:18:49,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 21:18:49,886 INFO L87 Difference]: Start difference. First operand 8264 states and 19958 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:57,294 INFO L93 Difference]: Finished difference Result 25077 states and 55934 transitions. [2021-05-21 21:18:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-05-21 21:18:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:18:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:57,316 INFO L225 Difference]: With dead ends: 25077 [2021-05-21 21:18:57,316 INFO L226 Difference]: Without dead ends: 24000 [2021-05-21 21:18:57,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29595 ImplicationChecksByTransitivity, 6569.3ms TimeCoverageRelationStatistics Valid=15969, Invalid=59931, Unknown=0, NotChecked=0, Total=75900 [2021-05-21 21:18:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24000 states. [2021-05-21 21:18:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24000 to 8860. [2021-05-21 21:18:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8859 states have (on average 2.3754374082853595) internal successors, (21044), 8859 states have internal predecessors, (21044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 21044 transitions. [2021-05-21 21:18:57,481 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 21044 transitions. Word has length 63 [2021-05-21 21:18:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:57,481 INFO L482 AbstractCegarLoop]: Abstraction has 8860 states and 21044 transitions. [2021-05-21 21:18:57,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 21044 transitions. [2021-05-21 21:18:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-21 21:18:57,487 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:57,487 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:57,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-05-21 21:18:57,688 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:57,688 INFO L82 PathProgramCache]: Analyzing trace with hash 248636239, now seen corresponding path program 116 times [2021-05-21 21:18:57,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:57,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214258416] [2021-05-21 21:18:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:57,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:57,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214258416] [2021-05-21 21:18:57,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214258416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:57,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528289699] [2021-05-21 21:18:57,837 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 [2021-05-21 21:18:57,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:18:57,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:57,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-21 21:18:57,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:58,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528289699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:58,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:58,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 46 [2021-05-21 21:18:58,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689501553] [2021-05-21 21:18:58,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:58,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:58,552 INFO L87 Difference]: Start difference. First operand 8860 states and 21044 transitions. Second operand has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:09,306 INFO L93 Difference]: Finished difference Result 18047 states and 40389 transitions. [2021-05-21 21:19:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2021-05-21 21:19:09,307 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-21 21:19:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:09,321 INFO L225 Difference]: With dead ends: 18047 [2021-05-21 21:19:09,321 INFO L226 Difference]: Without dead ends: 18043 [2021-05-21 21:19:09,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65131 ImplicationChecksByTransitivity, 9777.3ms TimeCoverageRelationStatistics Valid=28937, Invalid=109075, Unknown=0, NotChecked=0, Total=138012 [2021-05-21 21:19:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18043 states. [2021-05-21 21:19:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18043 to 9034. [2021-05-21 21:19:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9034 states, 9033 states have (on average 2.3871360566810584) internal successors, (21563), 9033 states have internal predecessors, (21563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9034 states to 9034 states and 21563 transitions. [2021-05-21 21:19:09,436 INFO L78 Accepts]: Start accepts. Automaton has 9034 states and 21563 transitions. Word has length 63 [2021-05-21 21:19:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:09,436 INFO L482 AbstractCegarLoop]: Abstraction has 9034 states and 21563 transitions. [2021-05-21 21:19:09,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 9034 states and 21563 transitions. [2021-05-21 21:19:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:19:09,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:09,442 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:09,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:09,650 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash -892450307, now seen corresponding path program 117 times [2021-05-21 21:19:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:09,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319520780] [2021-05-21 21:19:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:09,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:09,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319520780] [2021-05-21 21:19:09,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319520780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:09,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444905468] [2021-05-21 21:19:09,957 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 [2021-05-21 21:19:09,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 21:19:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-21 21:19:09,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:10,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444905468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:10,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:10,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-05-21 21:19:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919494571] [2021-05-21 21:19:10,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-21 21:19:10,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-21 21:19:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:19:10,824 INFO L87 Difference]: Start difference. First operand 9034 states and 21563 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:18,312 INFO L93 Difference]: Finished difference Result 12913 states and 29503 transitions. [2021-05-21 21:19:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-05-21 21:19:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:19:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:18,323 INFO L225 Difference]: With dead ends: 12913 [2021-05-21 21:19:18,323 INFO L226 Difference]: Without dead ends: 12355 [2021-05-21 21:19:18,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32726 ImplicationChecksByTransitivity, 6755.3ms TimeCoverageRelationStatistics Valid=21240, Invalid=58002, Unknown=0, NotChecked=0, Total=79242 [2021-05-21 21:19:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12355 states. [2021-05-21 21:19:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12355 to 8889. [2021-05-21 21:19:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8889 states, 8888 states have (on average 2.3834383438343836) internal successors, (21184), 8888 states have internal predecessors, (21184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 21184 transitions. [2021-05-21 21:19:18,417 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 21184 transitions. Word has length 65 [2021-05-21 21:19:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:18,417 INFO L482 AbstractCegarLoop]: Abstraction has 8889 states and 21184 transitions. [2021-05-21 21:19:18,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 21184 transitions. [2021-05-21 21:19:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:19:18,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:18,424 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:18,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:18,624 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1356747611, now seen corresponding path program 118 times [2021-05-21 21:19:18,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:18,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840731078] [2021-05-21 21:19:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:18,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:18,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840731078] [2021-05-21 21:19:18,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840731078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:18,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572913559] [2021-05-21 21:19:18,768 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 [2021-05-21 21:19:18,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:18,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:18,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:19:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:19,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572913559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:19,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:19,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30] total 45 [2021-05-21 21:19:19,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174838586] [2021-05-21 21:19:19,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-21 21:19:19,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:19,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-21 21:19:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 21:19:19,515 INFO L87 Difference]: Start difference. First operand 8889 states and 21184 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:26,187 INFO L93 Difference]: Finished difference Result 10949 states and 25244 transitions. [2021-05-21 21:19:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-05-21 21:19:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 21:19:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:26,196 INFO L225 Difference]: With dead ends: 10949 [2021-05-21 21:19:26,196 INFO L226 Difference]: Without dead ends: 10945 [2021-05-21 21:19:26,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31134 ImplicationChecksByTransitivity, 6226.8ms TimeCoverageRelationStatistics Valid=16708, Invalid=54848, Unknown=0, NotChecked=0, Total=71556 [2021-05-21 21:19:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10945 states. [2021-05-21 21:19:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10945 to 8841. [2021-05-21 21:19:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 2.3854072398190045) internal successors, (21087), 8840 states have internal predecessors, (21087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 21087 transitions. [2021-05-21 21:19:26,288 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 21087 transitions. Word has length 65 [2021-05-21 21:19:26,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:26,288 INFO L482 AbstractCegarLoop]: Abstraction has 8841 states and 21087 transitions. [2021-05-21 21:19:26,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 21087 transitions. [2021-05-21 21:19:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:19:26,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:26,295 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:26,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-05-21 21:19:26,496 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:26,496 INFO L82 PathProgramCache]: Analyzing trace with hash 426028347, now seen corresponding path program 119 times [2021-05-21 21:19:26,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:26,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938408315] [2021-05-21 21:19:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 1 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:26,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:26,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938408315] [2021-05-21 21:19:26,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938408315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:26,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002380527] [2021-05-21 21:19:26,647 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 [2021-05-21 21:19:26,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 21:19:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-21 21:19:26,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:26,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002380527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:26,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:26,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-05-21 21:19:26,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368921782] [2021-05-21 21:19:26,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:19:26,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:19:26,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:19:26,775 INFO L87 Difference]: Start difference. First operand 8841 states and 21087 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:27,001 INFO L93 Difference]: Finished difference Result 10902 states and 25809 transitions. [2021-05-21 21:19:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:19:27,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:19:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:27,012 INFO L225 Difference]: With dead ends: 10902 [2021-05-21 21:19:27,012 INFO L226 Difference]: Without dead ends: 10809 [2021-05-21 21:19:27,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:19:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2021-05-21 21:19:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10150. [2021-05-21 21:19:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 2.4184648733865406) internal successors, (24545), 10149 states have internal predecessors, (24545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 24545 transitions. [2021-05-21 21:19:27,177 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 24545 transitions. Word has length 67 [2021-05-21 21:19:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:27,177 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 24545 transitions. [2021-05-21 21:19:27,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 24545 transitions. [2021-05-21 21:19:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:19:27,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:27,185 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:27,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:27,401 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash -815506287, now seen corresponding path program 120 times [2021-05-21 21:19:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:27,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001904218] [2021-05-21 21:19:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:27,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:27,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001904218] [2021-05-21 21:19:27,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001904218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:27,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464164097] [2021-05-21 21:19:27,698 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 [2021-05-21 21:19:27,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 21:19:27,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-21 21:19:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:28,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464164097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:28,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:28,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2021-05-21 21:19:28,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421876538] [2021-05-21 21:19:28,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-21 21:19:28,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:28,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-21 21:19:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 21:19:28,624 INFO L87 Difference]: Start difference. First operand 10150 states and 24545 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:37,298 INFO L93 Difference]: Finished difference Result 19443 states and 44030 transitions. [2021-05-21 21:19:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-05-21 21:19:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:19:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:37,315 INFO L225 Difference]: With dead ends: 19443 [2021-05-21 21:19:37,315 INFO L226 Difference]: Without dead ends: 19410 [2021-05-21 21:19:37,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14672 ImplicationChecksByTransitivity, 5003.2ms TimeCoverageRelationStatistics Valid=2943, Invalid=40113, Unknown=0, NotChecked=0, Total=43056 [2021-05-21 21:19:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19410 states. [2021-05-21 21:19:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19410 to 10699. [2021-05-21 21:19:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10699 states, 10698 states have (on average 2.419798093101514) internal successors, (25887), 10698 states have internal predecessors, (25887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10699 states to 10699 states and 25887 transitions. [2021-05-21 21:19:37,471 INFO L78 Accepts]: Start accepts. Automaton has 10699 states and 25887 transitions. Word has length 67 [2021-05-21 21:19:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:37,471 INFO L482 AbstractCegarLoop]: Abstraction has 10699 states and 25887 transitions. [2021-05-21 21:19:37,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 10699 states and 25887 transitions. [2021-05-21 21:19:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:19:37,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:37,479 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:37,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:37,679 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:37,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1545872197, now seen corresponding path program 121 times [2021-05-21 21:19:37,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:37,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418282330] [2021-05-21 21:19:37,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:37,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418282330] [2021-05-21 21:19:37,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418282330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587916073] [2021-05-21 21:19:37,934 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 [2021-05-21 21:19:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-21 21:19:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:38,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587916073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:38,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:38,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32] total 50 [2021-05-21 21:19:38,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698596475] [2021-05-21 21:19:38,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:19:38,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:38,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:19:38,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:19:38,841 INFO L87 Difference]: Start difference. First operand 10699 states and 25887 transitions. Second operand has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:45,536 INFO L93 Difference]: Finished difference Result 13973 states and 32494 transitions. [2021-05-21 21:19:45,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-21 21:19:45,536 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:19:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:45,549 INFO L225 Difference]: With dead ends: 13973 [2021-05-21 21:19:45,549 INFO L226 Difference]: Without dead ends: 13969 [2021-05-21 21:19:45,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8803 ImplicationChecksByTransitivity, 4142.4ms TimeCoverageRelationStatistics Valid=2057, Invalid=26335, Unknown=0, NotChecked=0, Total=28392 [2021-05-21 21:19:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2021-05-21 21:19:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 10321. [2021-05-21 21:19:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 10320 states have (on average 2.4169573643410853) internal successors, (24943), 10320 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 24943 transitions. [2021-05-21 21:19:45,668 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 24943 transitions. Word has length 67 [2021-05-21 21:19:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:45,668 INFO L482 AbstractCegarLoop]: Abstraction has 10321 states and 24943 transitions. [2021-05-21 21:19:45,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 24943 transitions. [2021-05-21 21:19:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:19:45,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:45,675 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:45,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:45,876 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:45,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1944828693, now seen corresponding path program 122 times [2021-05-21 21:19:45,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:45,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670619590] [2021-05-21 21:19:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:46,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:46,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670619590] [2021-05-21 21:19:46,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670619590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:46,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897319179] [2021-05-21 21:19:46,124 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 [2021-05-21 21:19:46,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:46,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:47,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897319179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:47,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:47,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31] total 52 [2021-05-21 21:19:47,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001570668] [2021-05-21 21:19:47,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-21 21:19:47,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:47,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-21 21:19:47,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 21:19:47,024 INFO L87 Difference]: Start difference. First operand 10321 states and 24943 transitions. Second operand has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:58,316 INFO L93 Difference]: Finished difference Result 22051 states and 49545 transitions. [2021-05-21 21:19:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-05-21 21:19:58,316 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:19:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:58,336 INFO L225 Difference]: With dead ends: 22051 [2021-05-21 21:19:58,336 INFO L226 Difference]: Without dead ends: 22003 [2021-05-21 21:19:58,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26033 ImplicationChecksByTransitivity, 6443.6ms TimeCoverageRelationStatistics Valid=5439, Invalid=65051, Unknown=0, NotChecked=0, Total=70490 [2021-05-21 21:19:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22003 states. [2021-05-21 21:19:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22003 to 10745. [2021-05-21 21:19:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.415860014892033) internal successors, (25956), 10744 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 25956 transitions. [2021-05-21 21:19:58,508 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 25956 transitions. Word has length 67 [2021-05-21 21:19:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:58,508 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 25956 transitions. [2021-05-21 21:19:58,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 25956 transitions. [2021-05-21 21:19:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:19:58,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:58,516 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:58,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:58,717 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2010613401, now seen corresponding path program 123 times [2021-05-21 21:19:58,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:58,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927224016] [2021-05-21 21:19:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:58,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:58,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927224016] [2021-05-21 21:19:58,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927224016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:58,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131936618] [2021-05-21 21:19:58,965 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 [2021-05-21 21:19:59,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-21 21:19:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:59,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:59,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:59,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131936618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:59,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:59,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 53 [2021-05-21 21:19:59,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329040774] [2021-05-21 21:19:59,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-21 21:19:59,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-21 21:19:59,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2592, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:19:59,868 INFO L87 Difference]: Start difference. First operand 10745 states and 25956 transitions. Second operand has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:13,370 INFO L93 Difference]: Finished difference Result 25316 states and 56566 transitions. [2021-05-21 21:20:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-05-21 21:20:13,371 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:20:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:13,394 INFO L225 Difference]: With dead ends: 25316 [2021-05-21 21:20:13,394 INFO L226 Difference]: Without dead ends: 25238 [2021-05-21 21:20:13,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35837 ImplicationChecksByTransitivity, 8017.9ms TimeCoverageRelationStatistics Valid=7939, Invalid=85391, Unknown=0, NotChecked=0, Total=93330 [2021-05-21 21:20:13,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25238 states. [2021-05-21 21:20:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25238 to 10379. [2021-05-21 21:20:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 2.4208903449604935) internal successors, (25124), 10378 states have internal predecessors, (25124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 25124 transitions. [2021-05-21 21:20:13,561 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 25124 transitions. Word has length 67 [2021-05-21 21:20:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:13,561 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 25124 transitions. [2021-05-21 21:20:13,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 25124 transitions. [2021-05-21 21:20:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:20:13,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:13,569 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:13,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-05-21 21:20:13,770 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash -963543267, now seen corresponding path program 124 times [2021-05-21 21:20:13,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:13,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068641880] [2021-05-21 21:20:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:14,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:14,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068641880] [2021-05-21 21:20:14,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068641880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:14,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859600756] [2021-05-21 21:20:14,024 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 [2021-05-21 21:20:14,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:20:14,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-21 21:20:14,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:14,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859600756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:14,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:14,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 54 [2021-05-21 21:20:14,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055966134] [2021-05-21 21:20:14,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-21 21:20:14,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:14,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-21 21:20:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 21:20:14,930 INFO L87 Difference]: Start difference. First operand 10379 states and 25124 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:28,065 INFO L93 Difference]: Finished difference Result 28045 states and 62416 transitions. [2021-05-21 21:20:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2021-05-21 21:20:28,065 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:20:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:28,095 INFO L225 Difference]: With dead ends: 28045 [2021-05-21 21:20:28,095 INFO L226 Difference]: Without dead ends: 27931 [2021-05-21 21:20:28,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40964 ImplicationChecksByTransitivity, 8278.4ms TimeCoverageRelationStatistics Valid=10037, Invalid=94615, Unknown=0, NotChecked=0, Total=104652 [2021-05-21 21:20:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27931 states. [2021-05-21 21:20:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27931 to 10315. [2021-05-21 21:20:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10315 states, 10314 states have (on average 2.4203994570486715) internal successors, (24964), 10314 states have internal predecessors, (24964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 24964 transitions. [2021-05-21 21:20:28,278 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 24964 transitions. Word has length 67 [2021-05-21 21:20:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:28,278 INFO L482 AbstractCegarLoop]: Abstraction has 10315 states and 24964 transitions. [2021-05-21 21:20:28,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 24964 transitions. [2021-05-21 21:20:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:20:28,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:28,286 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:28,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:28,487 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:28,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1200841889, now seen corresponding path program 125 times [2021-05-21 21:20:28,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:28,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834195748] [2021-05-21 21:20:28,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:28,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:28,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834195748] [2021-05-21 21:20:28,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834195748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:28,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333645118] [2021-05-21 21:20:28,749 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 [2021-05-21 21:20:28,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-05-21 21:20:28,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:28,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-21 21:20:28,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:29,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333645118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:29,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:29,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 56 [2021-05-21 21:20:29,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753250716] [2021-05-21 21:20:29,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-21 21:20:29,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:29,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-21 21:20:29,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:20:29,636 INFO L87 Difference]: Start difference. First operand 10315 states and 24964 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:40,269 INFO L93 Difference]: Finished difference Result 31079 states and 68899 transitions. [2021-05-21 21:20:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-05-21 21:20:40,270 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:20:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:40,299 INFO L225 Difference]: With dead ends: 31079 [2021-05-21 21:20:40,299 INFO L226 Difference]: Without dead ends: 30923 [2021-05-21 21:20:40,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39065 ImplicationChecksByTransitivity, 7837.6ms TimeCoverageRelationStatistics Valid=11051, Invalid=87231, Unknown=0, NotChecked=0, Total=98282 [2021-05-21 21:20:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30923 states. [2021-05-21 21:20:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30923 to 10231. [2021-05-21 21:20:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10231 states, 10230 states have (on average 2.4218963831867057) internal successors, (24776), 10230 states have internal predecessors, (24776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10231 states to 10231 states and 24776 transitions. [2021-05-21 21:20:40,477 INFO L78 Accepts]: Start accepts. Automaton has 10231 states and 24776 transitions. Word has length 67 [2021-05-21 21:20:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:40,477 INFO L482 AbstractCegarLoop]: Abstraction has 10231 states and 24776 transitions. [2021-05-21 21:20:40,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 10231 states and 24776 transitions. [2021-05-21 21:20:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:20:40,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:40,484 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:40,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-05-21 21:20:40,685 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1516697381, now seen corresponding path program 126 times [2021-05-21 21:20:40,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:40,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174411489] [2021-05-21 21:20:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:40,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:40,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174411489] [2021-05-21 21:20:40,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174411489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:40,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79737181] [2021-05-21 21:20:40,931 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 [2021-05-21 21:20:40,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-05-21 21:20:40,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-21 21:20:40,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:41,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79737181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:41,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:41,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 56 [2021-05-21 21:20:41,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574971309] [2021-05-21 21:20:41,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-21 21:20:41,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-21 21:20:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:20:41,770 INFO L87 Difference]: Start difference. First operand 10231 states and 24776 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:50,836 INFO L93 Difference]: Finished difference Result 35057 states and 77375 transitions. [2021-05-21 21:20:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-05-21 21:20:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:20:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:50,870 INFO L225 Difference]: With dead ends: 35057 [2021-05-21 21:20:50,870 INFO L226 Difference]: Without dead ends: 34541 [2021-05-21 21:20:50,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29483 ImplicationChecksByTransitivity, 6452.6ms TimeCoverageRelationStatistics Valid=9853, Invalid=66047, Unknown=0, NotChecked=0, Total=75900 [2021-05-21 21:20:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34541 states. [2021-05-21 21:20:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34541 to 10223. [2021-05-21 21:20:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10223 states, 10222 states have (on average 2.422226570142829) internal successors, (24760), 10222 states have internal predecessors, (24760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10223 states to 10223 states and 24760 transitions. [2021-05-21 21:20:51,077 INFO L78 Accepts]: Start accepts. Automaton has 10223 states and 24760 transitions. Word has length 67 [2021-05-21 21:20:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:51,077 INFO L482 AbstractCegarLoop]: Abstraction has 10223 states and 24760 transitions. [2021-05-21 21:20:51,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10223 states and 24760 transitions. [2021-05-21 21:20:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:20:51,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:51,084 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:51,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-05-21 21:20:51,289 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:51,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1386608297, now seen corresponding path program 127 times [2021-05-21 21:20:51,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:51,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922528088] [2021-05-21 21:20:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:51,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:51,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922528088] [2021-05-21 21:20:51,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922528088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:51,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500422819] [2021-05-21 21:20:51,560 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 [2021-05-21 21:20:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-21 21:20:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:52,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500422819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:52,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:52,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 57 [2021-05-21 21:20:52,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297552760] [2021-05-21 21:20:52,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-21 21:20:52,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:52,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-21 21:20:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:20:52,410 INFO L87 Difference]: Start difference. First operand 10223 states and 24760 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:59,381 INFO L93 Difference]: Finished difference Result 37059 states and 81726 transitions. [2021-05-21 21:20:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-05-21 21:20:59,381 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:20:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:59,418 INFO L225 Difference]: With dead ends: 37059 [2021-05-21 21:20:59,418 INFO L226 Difference]: Without dead ends: 36519 [2021-05-21 21:20:59,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22513 ImplicationChecksByTransitivity, 5277.8ms TimeCoverageRelationStatistics Valid=8563, Invalid=49759, Unknown=0, NotChecked=0, Total=58322 [2021-05-21 21:20:59,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36519 states. [2021-05-21 21:20:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36519 to 10263. [2021-05-21 21:20:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 2.420580783473007) internal successors, (24840), 10262 states have internal predecessors, (24840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 24840 transitions. [2021-05-21 21:20:59,627 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 24840 transitions. Word has length 67 [2021-05-21 21:20:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:59,627 INFO L482 AbstractCegarLoop]: Abstraction has 10263 states and 24840 transitions. [2021-05-21 21:20:59,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 24840 transitions. [2021-05-21 21:20:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:20:59,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:59,635 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:59,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-05-21 21:20:59,835 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:59,836 INFO L82 PathProgramCache]: Analyzing trace with hash -201710803, now seen corresponding path program 128 times [2021-05-21 21:20:59,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:59,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058281134] [2021-05-21 21:20:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:00,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:00,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058281134] [2021-05-21 21:21:00,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058281134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:00,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417508045] [2021-05-21 21:21:00,110 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 [2021-05-21 21:21:00,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:21:00,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:00,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:21:00,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:00,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417508045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:00,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:00,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 59 [2021-05-21 21:21:00,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358505634] [2021-05-21 21:21:00,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-21 21:21:00,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:00,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-21 21:21:00,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3118, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:21:00,915 INFO L87 Difference]: Start difference. First operand 10263 states and 24840 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:08,397 INFO L93 Difference]: Finished difference Result 36366 states and 79874 transitions. [2021-05-21 21:21:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-05-21 21:21:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:21:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:08,435 INFO L225 Difference]: With dead ends: 36366 [2021-05-21 21:21:08,435 INFO L226 Difference]: Without dead ends: 35634 [2021-05-21 21:21:08,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30002 ImplicationChecksByTransitivity, 6070.4ms TimeCoverageRelationStatistics Valid=12366, Invalid=62436, Unknown=0, NotChecked=0, Total=74802 [2021-05-21 21:21:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35634 states. [2021-05-21 21:21:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35634 to 10295. [2021-05-21 21:21:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10295 states, 10294 states have (on average 2.41927336312415) internal successors, (24904), 10294 states have internal predecessors, (24904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10295 states to 10295 states and 24904 transitions. [2021-05-21 21:21:08,630 INFO L78 Accepts]: Start accepts. Automaton has 10295 states and 24904 transitions. Word has length 67 [2021-05-21 21:21:08,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:08,631 INFO L482 AbstractCegarLoop]: Abstraction has 10295 states and 24904 transitions. [2021-05-21 21:21:08,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 10295 states and 24904 transitions. [2021-05-21 21:21:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:21:08,638 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:08,638 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:08,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:08,838 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:08,838 INFO L82 PathProgramCache]: Analyzing trace with hash -300073807, now seen corresponding path program 129 times [2021-05-21 21:21:08,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:08,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888780805] [2021-05-21 21:21:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:09,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:09,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888780805] [2021-05-21 21:21:09,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888780805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:09,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24637211] [2021-05-21 21:21:09,120 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 [2021-05-21 21:21:09,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 21:21:09,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:09,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-21 21:21:09,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:09,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24637211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:09,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:09,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-05-21 21:21:09,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827881548] [2021-05-21 21:21:09,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-21 21:21:09,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-21 21:21:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3099, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:21:09,910 INFO L87 Difference]: Start difference. First operand 10295 states and 24904 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:17,255 INFO L93 Difference]: Finished difference Result 35312 states and 77377 transitions. [2021-05-21 21:21:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-05-21 21:21:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:21:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:17,295 INFO L225 Difference]: With dead ends: 35312 [2021-05-21 21:21:17,295 INFO L226 Difference]: Without dead ends: 34400 [2021-05-21 21:21:17,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30734 ImplicationChecksByTransitivity, 6022.5ms TimeCoverageRelationStatistics Valid=13856, Invalid=63150, Unknown=0, NotChecked=0, Total=77006 [2021-05-21 21:21:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34400 states. [2021-05-21 21:21:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34400 to 10319. [2021-05-21 21:21:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 2.418298119790657) internal successors, (24952), 10318 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 24952 transitions. [2021-05-21 21:21:17,544 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 24952 transitions. Word has length 67 [2021-05-21 21:21:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:17,544 INFO L482 AbstractCegarLoop]: Abstraction has 10319 states and 24952 transitions. [2021-05-21 21:21:17,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,544 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 24952 transitions. [2021-05-21 21:21:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:21:17,551 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:17,551 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:17,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-05-21 21:21:17,751 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:17,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1490617141, now seen corresponding path program 130 times [2021-05-21 21:21:17,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:17,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329605091] [2021-05-21 21:21:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:18,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:18,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329605091] [2021-05-21 21:21:18,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329605091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:18,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917074901] [2021-05-21 21:21:18,055 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 [2021-05-21 21:21:18,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:21:18,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:18,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-21 21:21:18,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:18,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917074901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:18,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:18,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-05-21 21:21:18,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658759569] [2021-05-21 21:21:18,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-21 21:21:18,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:18,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-21 21:21:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 21:21:18,865 INFO L87 Difference]: Start difference. First operand 10319 states and 24952 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:26,258 INFO L93 Difference]: Finished difference Result 33658 states and 73530 transitions. [2021-05-21 21:21:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-05-21 21:21:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:21:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:26,292 INFO L225 Difference]: With dead ends: 33658 [2021-05-21 21:21:26,293 INFO L226 Difference]: Without dead ends: 32578 [2021-05-21 21:21:26,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33793 ImplicationChecksByTransitivity, 6462.3ms TimeCoverageRelationStatistics Valid=16733, Invalid=67077, Unknown=0, NotChecked=0, Total=83810 [2021-05-21 21:21:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32578 states. [2021-05-21 21:21:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32578 to 10335. [2021-05-21 21:21:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.4176504741629574) internal successors, (24984), 10334 states have internal predecessors, (24984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 24984 transitions. [2021-05-21 21:21:26,559 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 24984 transitions. Word has length 67 [2021-05-21 21:21:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:26,559 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 24984 transitions. [2021-05-21 21:21:26,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:26,559 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 24984 transitions. [2021-05-21 21:21:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:21:26,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:26,566 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:26,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:26,766 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:26,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:26,767 INFO L82 PathProgramCache]: Analyzing trace with hash 805779129, now seen corresponding path program 131 times [2021-05-21 21:21:26,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:26,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358028800] [2021-05-21 21:21:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:27,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:27,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358028800] [2021-05-21 21:21:27,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358028800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:27,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031085023] [2021-05-21 21:21:27,083 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 [2021-05-21 21:21:27,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 21:21:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-21 21:21:27,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:27,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031085023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:27,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:27,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-05-21 21:21:27,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000023884] [2021-05-21 21:21:27,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-21 21:21:27,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:27,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-21 21:21:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=3340, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 21:21:27,934 INFO L87 Difference]: Start difference. First operand 10335 states and 24984 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:36,600 INFO L93 Difference]: Finished difference Result 29282 states and 65375 transitions. [2021-05-21 21:21:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-05-21 21:21:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:21:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:36,628 INFO L225 Difference]: With dead ends: 29282 [2021-05-21 21:21:36,628 INFO L226 Difference]: Without dead ends: 28076 [2021-05-21 21:21:36,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39537 ImplicationChecksByTransitivity, 7706.1ms TimeCoverageRelationStatistics Valid=20497, Invalid=75913, Unknown=0, NotChecked=0, Total=96410 [2021-05-21 21:21:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28076 states. [2021-05-21 21:21:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28076 to 10468. [2021-05-21 21:21:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3830132798318524) internal successors, (24943), 10467 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 24943 transitions. [2021-05-21 21:21:36,805 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 24943 transitions. Word has length 67 [2021-05-21 21:21:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:36,805 INFO L482 AbstractCegarLoop]: Abstraction has 10468 states and 24943 transitions. [2021-05-21 21:21:36,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 24943 transitions. [2021-05-21 21:21:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-21 21:21:36,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:36,813 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:37,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:37,029 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1637879469, now seen corresponding path program 132 times [2021-05-21 21:21:37,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:37,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835412223] [2021-05-21 21:21:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:37,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:37,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835412223] [2021-05-21 21:21:37,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835412223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:37,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306679178] [2021-05-21 21:21:37,207 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 [2021-05-21 21:21:37,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 21:21:37,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:37,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-21 21:21:37,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:38,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306679178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:38,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:38,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32] total 49 [2021-05-21 21:21:38,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456903111] [2021-05-21 21:21:38,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-21 21:21:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-21 21:21:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 21:21:38,004 INFO L87 Difference]: Start difference. First operand 10468 states and 24943 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:51,031 INFO L93 Difference]: Finished difference Result 20078 states and 44963 transitions. [2021-05-21 21:21:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-05-21 21:21:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-21 21:21:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:51,048 INFO L225 Difference]: With dead ends: 20078 [2021-05-21 21:21:51,048 INFO L226 Difference]: Without dead ends: 20074 [2021-05-21 21:21:51,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88148 ImplicationChecksByTransitivity, 12068.8ms TimeCoverageRelationStatistics Valid=38110, Invalid=144646, Unknown=0, NotChecked=0, Total=182756 [2021-05-21 21:21:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20074 states. [2021-05-21 21:21:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20074 to 10541. [2021-05-21 21:21:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10541 states, 10540 states have (on average 2.3928842504743835) internal successors, (25221), 10540 states have internal predecessors, (25221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 25221 transitions. [2021-05-21 21:21:51,188 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 25221 transitions. Word has length 67 [2021-05-21 21:21:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:51,188 INFO L482 AbstractCegarLoop]: Abstraction has 10541 states and 25221 transitions. [2021-05-21 21:21:51,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 25221 transitions. [2021-05-21 21:21:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-21 21:21:51,195 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:51,195 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:51,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-05-21 21:21:51,396 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:51,396 INFO L82 PathProgramCache]: Analyzing trace with hash 192572857, now seen corresponding path program 133 times [2021-05-21 21:21:51,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:51,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064320077] [2021-05-21 21:21:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:51,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:51,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064320077] [2021-05-21 21:21:51,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064320077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:51,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112103597] [2021-05-21 21:21:51,724 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 [2021-05-21 21:21:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:21:51,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:52,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112103597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:52,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:52,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2021-05-21 21:21:52,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26702216] [2021-05-21 21:21:52,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-21 21:21:52,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:52,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-21 21:21:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:21:52,645 INFO L87 Difference]: Start difference. First operand 10541 states and 25221 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:01,519 INFO L93 Difference]: Finished difference Result 14048 states and 32048 transitions. [2021-05-21 21:22:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-05-21 21:22:01,519 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-05-21 21:22:01,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:01,530 INFO L225 Difference]: With dead ends: 14048 [2021-05-21 21:22:01,530 INFO L226 Difference]: Without dead ends: 13436 [2021-05-21 21:22:01,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42486 ImplicationChecksByTransitivity, 8081.3ms TimeCoverageRelationStatistics Valid=27030, Invalid=73142, Unknown=0, NotChecked=0, Total=100172 [2021-05-21 21:22:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2021-05-21 21:22:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 10532. [2021-05-21 21:22:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.3910359889849016) internal successors, (25180), 10531 states have internal predecessors, (25180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25180 transitions. [2021-05-21 21:22:01,641 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25180 transitions. Word has length 69 [2021-05-21 21:22:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:01,641 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25180 transitions. [2021-05-21 21:22:01,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25180 transitions. [2021-05-21 21:22:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-21 21:22:01,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:01,648 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:01,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:01,849 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1907055525, now seen corresponding path program 134 times [2021-05-21 21:22:01,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:01,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322581983] [2021-05-21 21:22:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:02,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:02,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322581983] [2021-05-21 21:22:02,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322581983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:02,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633334148] [2021-05-21 21:22:02,049 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 [2021-05-21 21:22:02,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:22:02,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:02,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:22:02,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:02,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633334148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:02,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:02,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32] total 48 [2021-05-21 21:22:02,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966826375] [2021-05-21 21:22:02,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-21 21:22:02,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-21 21:22:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1881, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 21:22:02,856 INFO L87 Difference]: Start difference. First operand 10532 states and 25180 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:10,663 INFO L93 Difference]: Finished difference Result 12908 states and 29868 transitions. [2021-05-21 21:22:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-05-21 21:22:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-05-21 21:22:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:10,674 INFO L225 Difference]: With dead ends: 12908 [2021-05-21 21:22:10,674 INFO L226 Difference]: Without dead ends: 12904 [2021-05-21 21:22:10,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40550 ImplicationChecksByTransitivity, 7449.7ms TimeCoverageRelationStatistics Valid=21246, Invalid=69656, Unknown=0, NotChecked=0, Total=90902 [2021-05-21 21:22:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2021-05-21 21:22:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 10532. [2021-05-21 21:22:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.390941031241098) internal successors, (25179), 10531 states have internal predecessors, (25179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25179 transitions. [2021-05-21 21:22:10,782 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25179 transitions. Word has length 69 [2021-05-21 21:22:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:10,782 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25179 transitions. [2021-05-21 21:22:10,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25179 transitions. [2021-05-21 21:22:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-21 21:22:10,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:10,790 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:10,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:10,991 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1564076785, now seen corresponding path program 135 times [2021-05-21 21:22:10,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:10,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278562742] [2021-05-21 21:22:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:22:11,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:11,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278562742] [2021-05-21 21:22:11,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278562742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:11,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591926668] [2021-05-21 21:22:11,149 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 [2021-05-21 21:22:11,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 21:22:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-21 21:22:11,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:12,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591926668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:12,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:12,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-05-21 21:22:12,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221863138] [2021-05-21 21:22:12,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:12,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:12,058 INFO L87 Difference]: Start difference. First operand 10532 states and 25179 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:19,186 INFO L93 Difference]: Finished difference Result 24107 states and 54772 transitions. [2021-05-21 21:22:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-05-21 21:22:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-05-21 21:22:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:19,207 INFO L225 Difference]: With dead ends: 24107 [2021-05-21 21:22:19,207 INFO L226 Difference]: Without dead ends: 24107 [2021-05-21 21:22:19,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21229 ImplicationChecksByTransitivity, 6533.7ms TimeCoverageRelationStatistics Valid=13586, Invalid=43296, Unknown=0, NotChecked=0, Total=56882 [2021-05-21 21:22:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24107 states. [2021-05-21 21:22:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24107 to 16231. [2021-05-21 21:22:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16231 states, 16230 states have (on average 2.4091189155884165) internal successors, (39100), 16230 states have internal predecessors, (39100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16231 states to 16231 states and 39100 transitions. [2021-05-21 21:22:19,405 INFO L78 Accepts]: Start accepts. Automaton has 16231 states and 39100 transitions. Word has length 69 [2021-05-21 21:22:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:19,405 INFO L482 AbstractCegarLoop]: Abstraction has 16231 states and 39100 transitions. [2021-05-21 21:22:19,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 16231 states and 39100 transitions. [2021-05-21 21:22:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-21 21:22:19,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:19,417 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:19,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-05-21 21:22:19,618 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:19,618 INFO L82 PathProgramCache]: Analyzing trace with hash -543763977, now seen corresponding path program 136 times [2021-05-21 21:22:19,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:19,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774019726] [2021-05-21 21:22:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 1 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:19,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:19,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774019726] [2021-05-21 21:22:19,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774019726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:19,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534513587] [2021-05-21 21:22:19,774 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 [2021-05-21 21:22:19,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:22:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-21 21:22:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:19,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534513587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:19,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:19,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-05-21 21:22:19,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562679519] [2021-05-21 21:22:19,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:22:19,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:19,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:22:19,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:22:19,896 INFO L87 Difference]: Start difference. First operand 16231 states and 39100 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:20,141 INFO L93 Difference]: Finished difference Result 19318 states and 46494 transitions. [2021-05-21 21:22:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:22:20,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-05-21 21:22:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:20,160 INFO L225 Difference]: With dead ends: 19318 [2021-05-21 21:22:20,161 INFO L226 Difference]: Without dead ends: 19219 [2021-05-21 21:22:20,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:22:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19219 states. [2021-05-21 21:22:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19219 to 18332. [2021-05-21 21:22:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18332 states, 18331 states have (on average 2.4355463422617425) internal successors, (44646), 18331 states have internal predecessors, (44646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18332 states to 18332 states and 44646 transitions. [2021-05-21 21:22:20,401 INFO L78 Accepts]: Start accepts. Automaton has 18332 states and 44646 transitions. Word has length 71 [2021-05-21 21:22:20,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:20,401 INFO L482 AbstractCegarLoop]: Abstraction has 18332 states and 44646 transitions. [2021-05-21 21:22:20,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 18332 states and 44646 transitions. [2021-05-21 21:22:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-21 21:22:20,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:20,415 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:20,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-05-21 21:22:20,616 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:20,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1240447561, now seen corresponding path program 137 times [2021-05-21 21:22:20,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:20,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96676391] [2021-05-21 21:22:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:21,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:21,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96676391] [2021-05-21 21:22:21,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96676391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:21,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104814127] [2021-05-21 21:22:21,109 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 [2021-05-21 21:22:21,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 21:22:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:21,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-21 21:22:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:22,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104814127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:22,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:22,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-05-21 21:22:22,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676772419] [2021-05-21 21:22:22,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-21 21:22:22,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-21 21:22:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=4037, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 21:22:22,315 INFO L87 Difference]: Start difference. First operand 18332 states and 44646 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:29,342 INFO L93 Difference]: Finished difference Result 22788 states and 54409 transitions. [2021-05-21 21:22:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-21 21:22:29,342 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-05-21 21:22:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:29,365 INFO L225 Difference]: With dead ends: 22788 [2021-05-21 21:22:29,365 INFO L226 Difference]: Without dead ends: 22782 [2021-05-21 21:22:29,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8535 ImplicationChecksByTransitivity, 5013.6ms TimeCoverageRelationStatistics Valid=1710, Invalid=29796, Unknown=0, NotChecked=0, Total=31506 [2021-05-21 21:22:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22782 states. [2021-05-21 21:22:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22782 to 18201. [2021-05-21 21:22:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18201 states, 18200 states have (on average 2.431263736263736) internal successors, (44249), 18200 states have internal predecessors, (44249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18201 states to 18201 states and 44249 transitions. [2021-05-21 21:22:29,611 INFO L78 Accepts]: Start accepts. Automaton has 18201 states and 44249 transitions. Word has length 71 [2021-05-21 21:22:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:29,611 INFO L482 AbstractCegarLoop]: Abstraction has 18201 states and 44249 transitions. [2021-05-21 21:22:29,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 18201 states and 44249 transitions. [2021-05-21 21:22:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-21 21:22:29,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:29,625 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:29,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-05-21 21:22:29,825 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:29,826 INFO L82 PathProgramCache]: Analyzing trace with hash -761922611, now seen corresponding path program 138 times [2021-05-21 21:22:29,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:29,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105024931] [2021-05-21 21:22:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:30,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105024931] [2021-05-21 21:22:30,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105024931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151117662] [2021-05-21 21:22:30,085 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 [2021-05-21 21:22:30,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 21:22:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:30,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-05-21 21:22:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:31,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151117662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:31,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:31,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 54 [2021-05-21 21:22:31,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421511638] [2021-05-21 21:22:31,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-21 21:22:31,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:31,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-21 21:22:31,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 21:22:31,079 INFO L87 Difference]: Start difference. First operand 18201 states and 44249 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:40,183 INFO L93 Difference]: Finished difference Result 32295 states and 74537 transitions. [2021-05-21 21:22:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-05-21 21:22:40,183 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-05-21 21:22:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:40,214 INFO L225 Difference]: With dead ends: 32295 [2021-05-21 21:22:40,214 INFO L226 Difference]: Without dead ends: 32271 [2021-05-21 21:22:40,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17146 ImplicationChecksByTransitivity, 5528.4ms TimeCoverageRelationStatistics Valid=3190, Invalid=46762, Unknown=0, NotChecked=0, Total=49952 [2021-05-21 21:22:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32271 states. [2021-05-21 21:22:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32271 to 18835. [2021-05-21 21:22:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18835 states, 18834 states have (on average 2.43320590421578) internal successors, (45827), 18834 states have internal predecessors, (45827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18835 states to 18835 states and 45827 transitions. [2021-05-21 21:22:40,472 INFO L78 Accepts]: Start accepts. Automaton has 18835 states and 45827 transitions. Word has length 71 [2021-05-21 21:22:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:40,472 INFO L482 AbstractCegarLoop]: Abstraction has 18835 states and 45827 transitions. [2021-05-21 21:22:40,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 18835 states and 45827 transitions. [2021-05-21 21:22:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-21 21:22:40,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:40,486 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:40,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:40,686 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1492288521, now seen corresponding path program 139 times [2021-05-21 21:22:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:40,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772937557] [2021-05-21 21:22:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:40,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:40,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772937557] [2021-05-21 21:22:40,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772937557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:40,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890892226] [2021-05-21 21:22:40,930 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 [2021-05-21 21:22:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:40,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-05-21 21:22:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:41,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890892226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:41,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:41,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34] total 53 [2021-05-21 21:22:41,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91370416] [2021-05-21 21:22:41,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-21 21:22:41,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:41,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-21 21:22:41,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2613, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:22:41,993 INFO L87 Difference]: Start difference. First operand 18835 states and 45827 transitions. Second operand has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:50,373 INFO L93 Difference]: Finished difference Result 22962 states and 54390 transitions. [2021-05-21 21:22:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-21 21:22:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-05-21 21:22:50,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:50,396 INFO L225 Difference]: With dead ends: 22962 [2021-05-21 21:22:50,396 INFO L226 Difference]: Without dead ends: 22958 [2021-05-21 21:22:50,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10162 ImplicationChecksByTransitivity, 4640.1ms TimeCoverageRelationStatistics Valid=2219, Invalid=30361, Unknown=0, NotChecked=0, Total=32580 [2021-05-21 21:22:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22958 states. [2021-05-21 21:22:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22958 to 18355. [2021-05-21 21:22:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18355 states, 18354 states have (on average 2.4328756674294434) internal successors, (44653), 18354 states have internal predecessors, (44653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18355 states to 18355 states and 44653 transitions. [2021-05-21 21:22:50,695 INFO L78 Accepts]: Start accepts. Automaton has 18355 states and 44653 transitions. Word has length 71 [2021-05-21 21:22:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:50,695 INFO L482 AbstractCegarLoop]: Abstraction has 18355 states and 44653 transitions. [2021-05-21 21:22:50,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 18355 states and 44653 transitions. [2021-05-21 21:22:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-21 21:22:50,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:50,710 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:50,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-05-21 21:22:50,911 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash -350033327, now seen corresponding path program 140 times [2021-05-21 21:22:50,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:50,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113214706] [2021-05-21 21:22:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:51,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113214706] [2021-05-21 21:22:51,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113214706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285429984] [2021-05-21 21:22:51,178 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 [2021-05-21 21:22:51,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:22:51,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-21 21:22:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:52,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285429984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:52,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:52,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33] total 55 [2021-05-21 21:22:52,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874946149] [2021-05-21 21:22:52,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-21 21:22:52,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:52,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-21 21:22:52,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2813, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 21:22:52,155 INFO L87 Difference]: Start difference. First operand 18355 states and 44653 transitions. Second operand has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:04,795 INFO L93 Difference]: Finished difference Result 37702 states and 86336 transitions. [2021-05-21 21:23:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-05-21 21:23:04,796 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-05-21 21:23:04,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:04,838 INFO L225 Difference]: With dead ends: 37702 [2021-05-21 21:23:04,838 INFO L226 Difference]: Without dead ends: 37654 [2021-05-21 21:23:04,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30992 ImplicationChecksByTransitivity, 7326.0ms TimeCoverageRelationStatistics Valid=5971, Invalid=77261, Unknown=0, NotChecked=0, Total=83232 [2021-05-21 21:23:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37654 states. [2021-05-21 21:23:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37654 to 18337. [2021-05-21 21:23:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18337 states, 18336 states have (on average 2.4334096858638743) internal successors, (44619), 18336 states have internal predecessors, (44619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 44619 transitions. [2021-05-21 21:23:05,171 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 44619 transitions. Word has length 71 [2021-05-21 21:23:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:05,171 INFO L482 AbstractCegarLoop]: Abstraction has 18337 states and 44619 transitions. [2021-05-21 21:23:05,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 44619 transitions. [2021-05-21 21:23:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-21 21:23:05,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:05,184 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:05,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:05,385 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2012235221, now seen corresponding path program 141 times [2021-05-21 21:23:05,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:05,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051985219] [2021-05-21 21:23:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:05,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051985219] [2021-05-21 21:23:05,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051985219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171679668] [2021-05-21 21:23:05,677 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 [2021-05-21 21:23:05,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-05-21 21:23:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:05,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-21 21:23:05,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:06,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171679668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:06,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:06,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-05-21 21:23:06,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140299695] [2021-05-21 21:23:06,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-21 21:23:06,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:06,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-21 21:23:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2905, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:23:06,665 INFO L87 Difference]: Start difference. First operand 18337 states and 44619 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:22,019 INFO L93 Difference]: Finished difference Result 40824 states and 93013 transitions. [2021-05-21 21:23:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2021-05-21 21:23:22,019 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-05-21 21:23:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:22,059 INFO L225 Difference]: With dead ends: 40824 [2021-05-21 21:23:22,059 INFO L226 Difference]: Without dead ends: 40746 [2021-05-21 21:23:22,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43904 ImplicationChecksByTransitivity, 9006.1ms TimeCoverageRelationStatistics Valid=8886, Invalid=104346, Unknown=0, NotChecked=0, Total=113232 [2021-05-21 21:23:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40746 states. [2021-05-21 21:23:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40746 to 18395. [2021-05-21 21:23:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18395 states, 18394 states have (on average 2.434326410786126) internal successors, (44777), 18394 states have internal predecessors, (44777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 44777 transitions. [2021-05-21 21:23:22,348 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 44777 transitions. Word has length 71 [2021-05-21 21:23:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:22,348 INFO L482 AbstractCegarLoop]: Abstraction has 18395 states and 44777 transitions. [2021-05-21 21:23:22,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 44777 transitions. [2021-05-21 21:23:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-21 21:23:22,361 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:22,361 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:22,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-05-21 21:23:22,562 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1654141351, now seen corresponding path program 142 times [2021-05-21 21:23:22,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:22,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141282387] [2021-05-21 21:23:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 12 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:22,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:22,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141282387] [2021-05-21 21:23:22,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141282387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:22,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31038223] [2021-05-21 21:23:22,834 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 [2021-05-21 21:23:22,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:23:22,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-21 21:23:22,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 12 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:23,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31038223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:23,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:23,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33] total 57 [2021-05-21 21:23:23,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944203626] [2021-05-21 21:23:23,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-21 21:23:23,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:23,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-21 21:23:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2997, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:23:23,827 INFO L87 Difference]: Start difference. First operand 18395 states and 44777 transitions. Second operand has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:37,904 INFO L93 Difference]: Finished difference Result 45054 states and 102607 transitions. [2021-05-21 21:23:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2021-05-21 21:23:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-05-21 21:23:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:37,954 INFO L225 Difference]: With dead ends: 45054 [2021-05-21 21:23:37,954 INFO L226 Difference]: Without dead ends: 44940 [2021-05-21 21:23:37,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52320 ImplicationChecksByTransitivity, 9639.7ms TimeCoverageRelationStatistics Valid=11585, Invalid=120547, Unknown=0, NotChecked=0, Total=132132 [2021-05-21 21:23:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44940 states. [2021-05-21 21:23:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44940 to 18331. [2021-05-21 21:23:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18331 states, 18330 states have (on average 2.4338788870703763) internal successors, (44613), 18330 states have internal predecessors, (44613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18331 states to 18331 states and 44613 transitions. [2021-05-21 21:23:38,287 INFO L78 Accepts]: Start accepts. Automaton has 18331 states and 44613 transitions. Word has length 71 [2021-05-21 21:23:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:38,288 INFO L482 AbstractCegarLoop]: Abstraction has 18331 states and 44613 transitions. [2021-05-21 21:23:38,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18331 states and 44613 transitions. [2021-05-21 21:23:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-21 21:23:38,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:38,301 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:38,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-05-21 21:23:38,501 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1006846941, now seen corresponding path program 143 times [2021-05-21 21:23:38,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:38,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147770842] [2021-05-21 21:23:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 20 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:38,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:38,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147770842] [2021-05-21 21:23:38,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147770842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:38,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152066246] [2021-05-21 21:23:38,781 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 [2021-05-21 21:23:38,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-05-21 21:23:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-21 21:23:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 20 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152066246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:39,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:39,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 34] total 59 [2021-05-21 21:23:39,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828930578] [2021-05-21 21:23:39,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-21 21:23:39,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-21 21:23:39,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3192, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:23:39,758 INFO L87 Difference]: Start difference. First operand 18331 states and 44613 transitions. Second operand has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 59 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-05-21 21:23:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-21 21:23:43,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:43,809 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:23:43,810 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:23:43,811 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 21:23:43,812 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:23:43 BasicIcfg [2021-05-21 21:23:43,812 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:23:43,812 INFO L168 Benchmark]: Toolchain (without parser) took 768609.03 ms. Allocated memory was 371.2 MB in the beginning and 1.8 GB in the end (delta: 1.4 GB). Free memory was 350.8 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 376.6 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:43,812 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 371.2 MB. Free memory was 351.9 MB in the beginning and 351.9 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:23:43,812 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.13 ms. Allocated memory is still 371.2 MB. Free memory was 350.8 MB in the beginning and 349.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:43,812 INFO L168 Benchmark]: Boogie Preprocessor took 13.33 ms. Allocated memory is still 371.2 MB. Free memory was 349.3 MB in the beginning and 348.4 MB in the end (delta: 956.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:43,812 INFO L168 Benchmark]: RCFGBuilder took 190.23 ms. Allocated memory is still 371.2 MB. Free memory was 348.3 MB in the beginning and 337.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:43,812 INFO L168 Benchmark]: TraceAbstraction took 768381.12 ms. Allocated memory was 371.2 MB in the beginning and 1.8 GB in the end (delta: 1.4 GB). Free memory was 336.6 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 361.9 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:43,813 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 0.13 ms. Allocated memory is still 371.2 MB. Free memory was 351.9 MB in the beginning and 351.9 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.13 ms. Allocated memory is still 371.2 MB. Free memory was 350.8 MB in the beginning and 349.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.33 ms. Allocated memory is still 371.2 MB. Free memory was 349.3 MB in the beginning and 348.4 MB in the end (delta: 956.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 190.23 ms. Allocated memory is still 371.2 MB. Free memory was 348.3 MB in the beginning and 337.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 768381.12 ms. Allocated memory was 371.2 MB in the beginning and 1.8 GB in the end (delta: 1.4 GB). Free memory was 336.6 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 361.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (18331states) and FLOYD_HOARE automaton (currently 95 states, 60 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 150 known predicates. - 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: 768291.3ms, OverallIterations: 145, TraceHistogramMax: 14, EmptinessCheckTime: 554.7ms, AutomataDifference: 626064.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9357 SDtfs, 77724 SDslu, 169784 SDs, 0 SdLazy, 507762 SolverSat, 24229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 157294.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27263 GetRequests, 4950 SyntacticMatches, 94 SemanticMatches, 22218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882840 ImplicationChecksByTransitivity, 480519.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18835occurred in iteration=140, InterpolantAutomatonStates: 17654, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11719.8ms AutomataMinimizationTime, 144 MinimizatonAttempts, 930644 StatesRemovedByMinimization, 144 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 537.2ms SsaConstructionTime, 2825.2ms SatisfiabilityAnalysisTime, 94045.6ms InterpolantComputationTime, 14394 NumberOfCodeBlocks, 14394 NumberOfCodeBlocksAsserted, 1068 NumberOfCheckSat, 14106 ConstructedInterpolants, 0 QuantifiedInterpolants, 131283 SizeOfPredicates, 536 NumberOfNonLiveVariables, 16737 ConjunctsInSsa, 6319 ConjunctsInUnsatCore, 288 InterpolantComputations, 2 PerfectInterpolantSequences, 8550/51613 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